summaryrefslogtreecommitdiffstats
path: root/application/basilisk/base/content/browser.js
blob: be0a4d5bba4cdee6a8c26de82f3f4829ad0a27c3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var Ci = Components.interfaces;
var Cu = Components.utils;
var Cc = Components.classes;
var Cr = Components.results;

Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/ContextualIdentityService.jsm");
Cu.import("resource://gre/modules/NotificationDB.jsm");

// lazy module getters

/* global AboutHome:false, AddonWatcher:false,
          BrowserUITelemetry:false, BrowserUsageTelemetry:false, BrowserUtils:false,
          CastingApps:false, CharsetMenu:false, Color:false, ContentSearch:false,
          Deprecated:false, E10SUtils:false, FormValidationHandler:false,
          GMPInstallManager:false, LightweightThemeManager:false, Log:false,
          LoginManagerParent:false, NewTabUtils:false, PageThumbs:false,
          PluralForm:false, Preferences:false, PrivateBrowsingUtils:false,
          ProcessHangMonitor:false, PromiseUtils:false, ReaderMode:false,
          ReaderParent:false, RecentWindow:false, SessionStore:false,
          ShortcutUtils:false, SimpleServiceDiscovery:false, SitePermissions:false,
          TabCrashHandler:false, Task:false, TelemetryStopwatch:false,
          Translation:false, UITour:false, UpdateUtils:false, Weave:false,
          fxAccounts:false, gDevTools:false, gDevToolsBrowser:false, webrtcUI:false,
          URLBarZoom:false
 */

/**
 * IF YOU ADD OR REMOVE FROM THIS LIST, PLEASE UPDATE THE LIST ABOVE AS WELL.
 * XXX Bug 1325373 is for making eslint detect these automatically.
 */
[
  ["AboutHome", "resource:///modules/AboutHome.jsm"],
  ["AddonWatcher", "resource://gre/modules/AddonWatcher.jsm"],
  ["BrowserUITelemetry", "resource:///modules/BrowserUITelemetry.jsm"],
  ["BrowserUsageTelemetry", "resource:///modules/BrowserUsageTelemetry.jsm"],
  ["BrowserUtils", "resource://gre/modules/BrowserUtils.jsm"],
  ["CastingApps", "resource:///modules/CastingApps.jsm"],
  ["CharsetMenu", "resource://gre/modules/CharsetMenu.jsm"],
  ["Color", "resource://gre/modules/Color.jsm"],
  ["ContentSearch", "resource:///modules/ContentSearch.jsm"],
  ["Deprecated", "resource://gre/modules/Deprecated.jsm"],
  ["E10SUtils", "resource:///modules/E10SUtils.jsm"],
  ["ExtensionsUI", "resource:///modules/ExtensionsUI.jsm"],
  ["FormValidationHandler", "resource:///modules/FormValidationHandler.jsm"],
  ["GMPInstallManager", "resource://gre/modules/GMPInstallManager.jsm"],
  ["LightweightThemeManager", "resource://gre/modules/LightweightThemeManager.jsm"],
  ["Log", "resource://gre/modules/Log.jsm"],
  ["LoginManagerParent", "resource://gre/modules/LoginManagerParent.jsm"],
  ["NewTabUtils", "resource://gre/modules/NewTabUtils.jsm"],
  ["PageThumbs", "resource://gre/modules/PageThumbs.jsm"],
  ["PluralForm", "resource://gre/modules/PluralForm.jsm"],
  ["Preferences", "resource://gre/modules/Preferences.jsm"],
  ["PrivateBrowsingUtils", "resource://gre/modules/PrivateBrowsingUtils.jsm"],
  ["ProcessHangMonitor", "resource:///modules/ProcessHangMonitor.jsm"],
  ["PromiseUtils", "resource://gre/modules/PromiseUtils.jsm"],
  ["ReaderMode", "resource://gre/modules/ReaderMode.jsm"],
  ["ReaderParent", "resource:///modules/ReaderParent.jsm"],
  ["RecentWindow", "resource:///modules/RecentWindow.jsm"],
  ["SessionStore", "resource:///modules/sessionstore/SessionStore.jsm"],
  ["ShortcutUtils", "resource://gre/modules/ShortcutUtils.jsm"],
  ["SimpleServiceDiscovery", "resource://gre/modules/SimpleServiceDiscovery.jsm"],
  ["SitePermissions", "resource:///modules/SitePermissions.jsm"],
  ["TabCrashHandler", "resource:///modules/ContentCrashHandlers.jsm"],
  ["Task", "resource://gre/modules/Task.jsm"],
  ["TelemetryStopwatch", "resource://gre/modules/TelemetryStopwatch.jsm"],
  ["Translation", "resource:///modules/translation/Translation.jsm"],
  ["UITour", "resource:///modules/UITour.jsm"],
  ["UpdateUtils", "resource://gre/modules/UpdateUtils.jsm"],
  ["URLBarZoom", "resource:///modules/URLBarZoom.jsm"],
  ["Weave", "resource://services-sync/main.js"],
  ["fxAccounts", "resource://gre/modules/FxAccounts.jsm"],
  ["gDevTools", "resource://devtools/client/framework/gDevTools.jsm"],
  ["gDevToolsBrowser", "resource://devtools/client/framework/gDevTools.jsm"],
  ["webrtcUI", "resource:///modules/webrtcUI.jsm"],
].forEach(([name, resource]) => XPCOMUtils.defineLazyModuleGetter(this, name, resource));

XPCOMUtils.defineLazyModuleGetter(this, "SafeBrowsing",
  "resource://gre/modules/SafeBrowsing.jsm");

// lazy service getters

/* global Favicons:false, WindowsUIUtils:false, gAboutNewTabService:false,
          gDNSService:false
*/
/**
 * IF YOU ADD OR REMOVE FROM THIS LIST, PLEASE UPDATE THE LIST ABOVE AS WELL.
 * XXX Bug 1325373 is for making eslint detect these automatically.
 */
[
  ["Favicons", "@mozilla.org/browser/favicon-service;1", "mozIAsyncFavicons"],
  ["WindowsUIUtils", "@mozilla.org/windows-ui-utils;1", "nsIWindowsUIUtils"],
  ["gAboutNewTabService", "@mozilla.org/browser/aboutnewtab-service;1", "nsIAboutNewTabService"],
  ["gDNSService", "@mozilla.org/network/dns-service;1", "nsIDNSService"],
].forEach(([name, cc, ci]) => XPCOMUtils.defineLazyServiceGetter(this, name, cc, ci));

XPCOMUtils.defineLazyServiceGetter(this, "gSerializationHelper",
                                   "@mozilla.org/network/serialization-helper;1",
                                   "nsISerializationHelper");

XPCOMUtils.defineLazyGetter(this, "BrowserToolboxProcess", function() {
  let tmp = {};
  Cu.import("resource://devtools/client/framework/ToolboxProcess.jsm", tmp);
  return tmp.BrowserToolboxProcess;
});

XPCOMUtils.defineLazyGetter(this, "gBrowserBundle", function() {
  return Services.strings.createBundle("chrome://browser/locale/browser.properties");
});

XPCOMUtils.defineLazyGetter(this, "gCustomizeMode", function() {
  let scope = {};
  Cu.import("resource:///modules/CustomizeMode.jsm", scope);
  return new scope.CustomizeMode(window);
});

XPCOMUtils.defineLazyGetter(this, "gPrefService", function() {
  return Services.prefs;
});

XPCOMUtils.defineLazyGetter(this, "InlineSpellCheckerUI", function() {
  let tmp = {};
  Cu.import("resource://gre/modules/InlineSpellChecker.jsm", tmp);
  return new tmp.InlineSpellChecker();
});

XPCOMUtils.defineLazyGetter(this, "PageMenuParent", function() {
  let tmp = {};
  Cu.import("resource://gre/modules/PageMenu.jsm", tmp);
  return new tmp.PageMenuParent();
});

XPCOMUtils.defineLazyGetter(this, "PopupNotifications", function() {
  let tmp = {};
  Cu.import("resource://gre/modules/PopupNotifications.jsm", tmp);
  try {
    // Hide all notifications while the URL is being edited and the address bar
    // has focus, including the virtual focus in the results popup.
    // We also have to hide notifications explicitly when the window is
    // minimized because of the effects of the "noautohide" attribute on Linux.
    // This can be removed once bug 545265 and bug 1320361 are fixed.
    let shouldSuppress = () => {
      return window.windowState == window.STATE_MINIMIZED ||
             (gURLBar.getAttribute("pageproxystate") != "valid" &&
             gURLBar.focused);
    };
    return new tmp.PopupNotifications(gBrowser,
                                      document.getElementById("notification-popup"),
                                      document.getElementById("notification-popup-box"),
                                      { shouldSuppress });
  } catch (ex) {
    Cu.reportError(ex);
    return null;
  }
});

XPCOMUtils.defineLazyGetter(this, "Win7Features", function() {
#ifdef XP_WIN
  const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1";
  if (WINTASKBAR_CONTRACTID in Cc &&
      Cc[WINTASKBAR_CONTRACTID].getService(Ci.nsIWinTaskbar).available) {
    let AeroPeek = Cu.import("resource:///modules/WindowsPreviewPerTab.jsm", {}).AeroPeek;
    return {
      onOpenWindow() {
        AeroPeek.onOpenWindow(window);
      },
      onCloseWindow() {
        AeroPeek.onCloseWindow(window);
      }
    };
  }
#endif
  return null;
});

const nsIWebNavigation = Ci.nsIWebNavigation;

var gLastBrowserCharset = null;
var gLastValidURLStr = "";
var gInPrintPreviewMode = false;
var gContextMenu = null; // nsContextMenu instance
var gMultiProcessBrowser =
  window.QueryInterface(Ci.nsIInterfaceRequestor)
        .getInterface(Ci.nsIWebNavigation)
        .QueryInterface(Ci.nsILoadContext)
        .useRemoteTabs;
var gAppInfo = Cc["@mozilla.org/xre/app-info;1"]
                  .getService(Ci.nsIXULAppInfo)
                  .QueryInterface(Ci.nsIXULRuntime);

#ifndef XP_MACOSX
var gEditUIVisible = true;
#endif

/* globals gBrowser, gNavToolbox, gURLBar, gNavigatorBundle*/
[
  ["gBrowser",            "content"],
  ["gNavToolbox",         "navigator-toolbox"],
  ["gURLBar",             "urlbar"],
  ["gNavigatorBundle",    "bundle_browser"]
].forEach(function(elementGlobal) {
  var [name, id] = elementGlobal;
  window.__defineGetter__(name, function() {
    var element = document.getElementById(id);
    if (!element)
      return null;
    delete window[name];
    return window[name] = element;
  });
  window.__defineSetter__(name, function(val) {
    delete window[name];
    return window[name] = val;
  });
});

// Smart getter for the findbar.  If you don't wish to force the creation of
// the findbar, check gFindBarInitialized first.

this.__defineGetter__("gFindBar", function() {
  return window.gBrowser.getFindBar();
});

this.__defineGetter__("gFindBarInitialized", function() {
  return window.gBrowser.isFindBarInitialized();
});

this.__defineGetter__("AddonManager", function() {
  let tmp = {};
  Cu.import("resource://gre/modules/AddonManager.jsm", tmp);
  return this.AddonManager = tmp.AddonManager;
});
this.__defineSetter__("AddonManager", function(val) {
  delete this.AddonManager;
  return this.AddonManager = val;
});


var gInitialPages = [
  "about:blank",
  "about:newtab",
  "about:home",
  "about:privatebrowsing",
  "about:welcomeback",
  "about:sessionrestore"
];

function* browserWindows() {
  let windows = Services.wm.getEnumerator("navigator:browser");
  while (windows.hasMoreElements())
    yield windows.getNext();
}

/**
* We can avoid adding multiple load event listeners and save some time by adding
* one listener that calls all real handlers.
*/
function pageShowEventHandlers(persisted) {
  XULBrowserWindow.asyncUpdateUI();
}

function UpdateBackForwardCommands(aWebNavigation) {
  var backBroadcaster = document.getElementById("Browser:Back");
  var forwardBroadcaster = document.getElementById("Browser:Forward");

  // Avoid setting attributes on broadcasters if the value hasn't changed!
  // Remember, guys, setting attributes on elements is expensive!  They
  // get inherited into anonymous content, broadcast to other widgets, etc.!
  // Don't do it if the value hasn't changed! - dwh

  var backDisabled = backBroadcaster.hasAttribute("disabled");
  var forwardDisabled = forwardBroadcaster.hasAttribute("disabled");
  if (backDisabled == aWebNavigation.canGoBack) {
    if (backDisabled)
      backBroadcaster.removeAttribute("disabled");
    else
      backBroadcaster.setAttribute("disabled", true);
  }

  if (forwardDisabled == aWebNavigation.canGoForward) {
    if (forwardDisabled)
      forwardBroadcaster.removeAttribute("disabled");
    else
      forwardBroadcaster.setAttribute("disabled", true);
  }
}

/**
 * Click-and-Hold implementation for the Back and Forward buttons
 * XXXmano: should this live in toolbarbutton.xml?
 */
function SetClickAndHoldHandlers() {
  // Bug 414797: Clone the back/forward buttons' context menu into both buttons.
  let popup = document.getElementById("backForwardMenu").cloneNode(true);
  popup.removeAttribute("id");
  // Prevent the back/forward buttons' context attributes from being inherited.
  popup.setAttribute("context", "");

  let backButton = document.getElementById("back-button");
  backButton.setAttribute("type", "menu");
  backButton.appendChild(popup);
  gClickAndHoldListenersOnElement.add(backButton);

  let forwardButton = document.getElementById("forward-button");
  popup = popup.cloneNode(true);
  forwardButton.setAttribute("type", "menu");
  forwardButton.appendChild(popup);
  gClickAndHoldListenersOnElement.add(forwardButton);
}


const gClickAndHoldListenersOnElement = {
  _timers: new Map(),

  _mousedownHandler(aEvent) {
    if (aEvent.button != 0 ||
        aEvent.currentTarget.open ||
        aEvent.currentTarget.disabled)
      return;

    // Prevent the menupopup from opening immediately
    aEvent.currentTarget.firstChild.hidden = true;

    aEvent.currentTarget.addEventListener("mouseout", this);
    aEvent.currentTarget.addEventListener("mouseup", this);
    this._timers.set(aEvent.currentTarget, setTimeout((b) => this._openMenu(b), 500, aEvent.currentTarget));
  },

  _clickHandler(aEvent) {
    if (aEvent.button == 0 &&
        aEvent.target == aEvent.currentTarget &&
        !aEvent.currentTarget.open &&
        !aEvent.currentTarget.disabled) {
      let cmdEvent = document.createEvent("xulcommandevent");
      cmdEvent.initCommandEvent("command", true, true, window, 0,
                                aEvent.ctrlKey, aEvent.altKey, aEvent.shiftKey,
                                aEvent.metaKey, null);
      aEvent.currentTarget.dispatchEvent(cmdEvent);

      // This is here to cancel the XUL default event
      // dom.click() triggers a command even if there is a click handler
      // however this can now be prevented with preventDefault().
      aEvent.preventDefault();
    }
  },

  _openMenu(aButton) {
    this._cancelHold(aButton);
    aButton.firstChild.hidden = false;
    aButton.open = true;
  },

  _mouseoutHandler(aEvent) {
    let buttonRect = aEvent.currentTarget.getBoundingClientRect();
    if (aEvent.clientX >= buttonRect.left &&
        aEvent.clientX <= buttonRect.right &&
        aEvent.clientY >= buttonRect.bottom)
      this._openMenu(aEvent.currentTarget);
    else
      this._cancelHold(aEvent.currentTarget);
  },

  _mouseupHandler(aEvent) {
    this._cancelHold(aEvent.currentTarget);
  },

  _cancelHold(aButton) {
    clearTimeout(this._timers.get(aButton));
    aButton.removeEventListener("mouseout", this);
    aButton.removeEventListener("mouseup", this);
  },

  handleEvent(e) {
    switch (e.type) {
      case "mouseout":
        this._mouseoutHandler(e);
        break;
      case "mousedown":
        this._mousedownHandler(e);
        break;
      case "click":
        this._clickHandler(e);
        break;
      case "mouseup":
        this._mouseupHandler(e);
        break;
    }
  },

  remove(aButton) {
    aButton.removeEventListener("mousedown", this, true);
    aButton.removeEventListener("click", this, true);
  },

  add(aElm) {
    this._timers.delete(aElm);

    aElm.addEventListener("mousedown", this, true);
    aElm.addEventListener("click", this, true);
  }
};

const gSessionHistoryObserver = {
  observe(subject, topic, data) {
    if (topic != "browser:purge-session-history")
      return;

    var backCommand = document.getElementById("Browser:Back");
    backCommand.setAttribute("disabled", "true");
    var fwdCommand = document.getElementById("Browser:Forward");
    fwdCommand.setAttribute("disabled", "true");

    // Hide session restore button on about:home
    window.messageManager.broadcastAsyncMessage("Browser:HideSessionRestoreButton");

    // Clear undo history of the URL bar
    gURLBar.editor.transactionManager.clear()
  }
};

/**
 * Given a starting docshell and a URI to look up, find the docshell the URI
 * is loaded in.
 * @param   aDocument
 *          A document to find instead of using just a URI - this is more specific.
 * @param   aDocShell
 *          The doc shell to start at
 * @param   aSoughtURI
 *          The URI that we're looking for
 * @returns The doc shell that the sought URI is loaded in. Can be in
 *          subframes.
 */
function findChildShell(aDocument, aDocShell, aSoughtURI) {
  aDocShell.QueryInterface(Components.interfaces.nsIWebNavigation);
  aDocShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
  var doc = aDocShell.getInterface(Components.interfaces.nsIDOMDocument);
  if ((aDocument && doc == aDocument) ||
      (aSoughtURI && aSoughtURI.spec == aDocShell.currentURI.spec))
    return aDocShell;

  var node = aDocShell.QueryInterface(Components.interfaces.nsIDocShellTreeItem);
  for (var i = 0; i < node.childCount; ++i) {
    var docShell = node.getChildAt(i);
    docShell = findChildShell(aDocument, docShell, aSoughtURI);
    if (docShell)
      return docShell;
  }
  return null;
}

var gPopupBlockerObserver = {
  _reportButton: null,

  onReportButtonMousedown(aEvent) {
    // The button is part of the textbox that is considered the popup's anchor,
    // thus consumeoutsideclicks="false" is ignored. Moreover On OS X the popup
    // is hidden well before mousedown gets dispatched.
    // Thus, if the popup is open and the user clicks on the button, it gets
    // hidden before mousedown, and may then be unexpectedly reopened by click.
    // To avoid this, we check if mousedown is in the same tick as popupHidden,
    // and, in such a case, we don't handle the click event.
    // Note we can't just openPopup in mousedown, cause this popup is shared by
    // multiple anchors, and we could end up opening it just before the other
    // anchor tries to hide it.
    if (aEvent.button != 0 || aEvent.target != this._reportButton || this.isPopupHidingTick)
      return;

    this._reportButton.addEventListener("click", event => {
      document.getElementById("blockedPopupOptions")
              .openPopup(event.target, "after_end", 0, 2, false, false, event);
    }, { once: true });
  },

  handleEvent(aEvent) {
    if (aEvent.originalTarget != gBrowser.selectedBrowser)
      return;

    if (!this._reportButton)
      this._reportButton = document.getElementById("page-report-button");

    if (!gBrowser.selectedBrowser.blockedPopups ||
        !gBrowser.selectedBrowser.blockedPopups.length) {
      // Hide the icon in the location bar (if the location bar exists)
      this._reportButton.hidden = true;

      // Hide the notification box (if it's visible).
      let notificationBox = gBrowser.getNotificationBox();
      let notification = notificationBox.getNotificationWithValue("popup-blocked");
      if (notification) {
        notificationBox.removeNotification(notification, false);
      }
      return;
    }

    this._reportButton.hidden = false;

    // Only show the notification again if we've not already shown it. Since
    // notifications are per-browser, we don't need to worry about re-adding
    // it.
    if (!gBrowser.selectedBrowser.blockedPopups.reported) {
      if (gPrefService.getBoolPref("privacy.popups.showBrowserMessage")) {
        var brandBundle = document.getElementById("bundle_brand");
        var brandShortName = brandBundle.getString("brandShortName");
        var popupCount = gBrowser.selectedBrowser.blockedPopups.length;

        var stringKey = "popupWarningButton";

        var popupButtonText = gNavigatorBundle.getString(stringKey);
        var popupButtonAccesskey = gNavigatorBundle.getString(stringKey + ".accesskey");

        var messageBase = gNavigatorBundle.getString("popupWarning.message");
        var message = PluralForm.get(popupCount, messageBase)
                                .replace("#1", brandShortName)
                                .replace("#2", popupCount);

        let notificationBox = gBrowser.getNotificationBox();
        let notification = notificationBox.getNotificationWithValue("popup-blocked");
        if (notification) {
          notification.label = message;
        } else {
          var buttons = [{
            label: popupButtonText,
            accessKey: popupButtonAccesskey,
            popup: "blockedPopupOptions",
            callback: null
          }];

          const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
          notificationBox.appendNotification(message, "popup-blocked",
                                             "chrome://browser/skin/Info.png",
                                             priority, buttons);
        }
      }

      // Record the fact that we've reported this blocked popup, so we don't
      // show it again.
      gBrowser.selectedBrowser.blockedPopups.reported = true;
    }
  },

  toggleAllowPopupsForSite(aEvent) {
    var pm = Services.perms;
    var shouldBlock = aEvent.target.getAttribute("block") == "true";
    var perm = shouldBlock ? pm.DENY_ACTION : pm.ALLOW_ACTION;
    pm.addFromPrincipal(gBrowser.contentPrincipal, "popup", perm);

    if (!shouldBlock)
      this.showAllBlockedPopups(gBrowser.selectedBrowser);

    gBrowser.getNotificationBox().removeCurrentNotification();
  },

  fillPopupList(aEvent) {
    // XXXben - rather than using |currentURI| here, which breaks down on multi-framed sites
    //          we should really walk the blockedPopups and create a list of "allow for <host>"
    //          menuitems for the common subset of hosts present in the report, this will
    //          make us frame-safe.
    //
    // XXXjst - Note that when this is fixed to work with multi-framed sites,
    //          also back out the fix for bug 343772 where
    //          nsGlobalWindow::CheckOpenAllow() was changed to also
    //          check if the top window's location is whitelisted.
    let browser = gBrowser.selectedBrowser;
    var uri = browser.contentPrincipal.URI || browser.currentURI;
    var blockedPopupAllowSite = document.getElementById("blockedPopupAllowSite");
    try {
      blockedPopupAllowSite.removeAttribute("hidden");
      let uriHost = uri.asciiHost ? uri.host : uri.spec;
      var pm = Services.perms;
      if (pm.testPermission(uri, "popup") == pm.ALLOW_ACTION) {
        // Offer an item to block popups for this site, if a whitelist entry exists
        // already for it.
        let blockString = gNavigatorBundle.getFormattedString("popupBlock", [uriHost]);
        blockedPopupAllowSite.setAttribute("label", blockString);
        blockedPopupAllowSite.setAttribute("block", "true");
      } else {
        // Offer an item to allow popups for this site
        let allowString = gNavigatorBundle.getFormattedString("popupAllow", [uriHost]);
        blockedPopupAllowSite.setAttribute("label", allowString);
        blockedPopupAllowSite.removeAttribute("block");
      }
    } catch (e) {
      blockedPopupAllowSite.setAttribute("hidden", "true");
    }

    if (PrivateBrowsingUtils.isWindowPrivate(window))
      blockedPopupAllowSite.setAttribute("disabled", "true");
    else
      blockedPopupAllowSite.removeAttribute("disabled");

    let blockedPopupDontShowMessage = document.getElementById("blockedPopupDontShowMessage");
    let showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
    blockedPopupDontShowMessage.setAttribute("checked", !showMessage);
    if (aEvent.target.anchorNode.id == "page-report-button") {
      aEvent.target.anchorNode.setAttribute("open", "true");
      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromLocationbar"));
    } else {
      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromMessage"));
    }

    let blockedPopupsSeparator =
        document.getElementById("blockedPopupsSeparator");
    blockedPopupsSeparator.setAttribute("hidden", true);

    gBrowser.selectedBrowser.retrieveListOfBlockedPopups().then(blockedPopups => {
      let foundUsablePopupURI = false;
      if (blockedPopups) {
        for (let i = 0; i < blockedPopups.length; i++) {
          let blockedPopup = blockedPopups[i];

          // popupWindowURI will be null if the file picker popup is blocked.
          // xxxdz this should make the option say "Show file picker" and do it (Bug 590306)
          if (!blockedPopup.popupWindowURIspec)
            continue;

          var popupURIspec = blockedPopup.popupWindowURIspec;

          // Sometimes the popup URI that we get back from the blockedPopup
          // isn't useful (for instance, netscape.com's popup URI ends up
          // being "http://www.netscape.com", which isn't really the URI of
          // the popup they're trying to show).  This isn't going to be
          // useful to the user, so we won't create a menu item for it.
          if (popupURIspec == "" || popupURIspec == "about:blank" ||
              popupURIspec == "<self>" ||
              popupURIspec == uri.spec)
            continue;

          // Because of the short-circuit above, we may end up in a situation
          // in which we don't have any usable popup addresses to show in
          // the menu, and therefore we shouldn't show the separator.  However,
          // since we got past the short-circuit, we must've found at least
          // one usable popup URI and thus we'll turn on the separator later.
          foundUsablePopupURI = true;

          var menuitem = document.createElement("menuitem");
          var label = gNavigatorBundle.getFormattedString("popupShowPopupPrefix",
                                                          [popupURIspec]);
          menuitem.setAttribute("label", label);
          menuitem.setAttribute("oncommand", "gPopupBlockerObserver.showBlockedPopup(event);");
          menuitem.setAttribute("popupReportIndex", i);
          menuitem.popupReportBrowser = browser;
          aEvent.target.appendChild(menuitem);
        }
      }

      // Show the separator if we added any
      // showable popup addresses to the menu.
      if (foundUsablePopupURI)
        blockedPopupsSeparator.removeAttribute("hidden");
    }, null);
  },

  onPopupHiding(aEvent) {
    if (aEvent.target.anchorNode.id == "page-report-button") {
      aEvent.target.anchorNode.removeAttribute("open");

      this.isPopupHidingTick = true;
      setTimeout(() => this.isPopupHidingTick = false, 0);
    }

    let item = aEvent.target.lastChild;
    while (item && item.getAttribute("observes") != "blockedPopupsSeparator") {
      let next = item.previousSibling;
      item.parentNode.removeChild(item);
      item = next;
    }
  },

  showBlockedPopup(aEvent) {
    var target = aEvent.target;
    var popupReportIndex = target.getAttribute("popupReportIndex");
    let browser = target.popupReportBrowser;
    browser.unblockPopup(popupReportIndex);
  },

  showAllBlockedPopups(aBrowser) {
    aBrowser.retrieveListOfBlockedPopups().then(popups => {
      for (let i = 0; i < popups.length; i++) {
        if (popups[i].popupWindowURIspec)
          aBrowser.unblockPopup(i);
      }
    }, null);
  },

  editPopupSettings() {
    let prefillValue = "";
    try {
      // We use contentPrincipal rather than currentURI to get the right
      // value in case this is a data: URI that's inherited off something else.
      // Some principals don't have URIs, so fall back in case URI is not present.
      let principalURI = gBrowser.contentPrincipal.URI || gBrowser.currentURI;
      if (principalURI) {
        // asciiHost conveniently doesn't throw.
        if (principalURI.asciiHost) {
          prefillValue = principalURI.prePath;
        } else {
          // For host-less URIs like file://, prePath would effectively allow
          // popups everywhere on file://. Use the full spec:
          prefillValue = principalURI.spec;
        }
      }
    } catch (e) { }

    var bundlePreferences = document.getElementById("bundle_preferences");
    var params = { blockVisible   : false,
                   sessionVisible : false,
                   allowVisible   : true,
                   prefilledHost  : prefillValue,
                   permissionType : "popup",
                   windowTitle    : bundlePreferences.getString("popuppermissionstitle"),
                   introText      : bundlePreferences.getString("popuppermissionstext") };
    var existingWindow = Services.wm.getMostRecentWindow("Browser:Permissions");
    if (existingWindow) {
      existingWindow.initWithParams(params);
      existingWindow.focus();
    } else
      window.openDialog("chrome://browser/content/preferences/permissions.xul",
                        "_blank", "resizable,dialog=no,centerscreen", params);
  },

  dontShowMessage() {
    var showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
    gPrefService.setBoolPref("privacy.popups.showBrowserMessage", !showMessage);
    gBrowser.getNotificationBox().removeCurrentNotification();
  }
};

function gKeywordURIFixup({ target: browser, data: fixupInfo }) {
  let deserializeURI = (spec) => spec ? makeURI(spec) : null;

  // We get called irrespective of whether we did a keyword search, or
  // whether the original input would be vaguely interpretable as a URL,
  // so figure that out first.
  let alternativeURI = deserializeURI(fixupInfo.fixedURI);
  if (!fixupInfo.keywordProviderName || !alternativeURI || !alternativeURI.host) {
    return;
  }

  // At this point we're still only just about to load this URI.
  // When the async DNS lookup comes back, we may be in any of these states:
  // 1) still on the previous URI, waiting for the preferredURI (keyword
  //    search) to respond;
  // 2) at the keyword search URI (preferredURI)
  // 3) at some other page because the user stopped navigation.
  // We keep track of the currentURI to detect case (1) in the DNS lookup
  // callback.
  let previousURI = browser.currentURI;
  let preferredURI = deserializeURI(fixupInfo.preferredURI);

  // now swap for a weak ref so we don't hang on to browser needlessly
  // even if the DNS query takes forever
  let weakBrowser = Cu.getWeakReference(browser);
  browser = null;

  // Additionally, we need the host of the parsed url
  let hostName = alternativeURI.host;
  // and the ascii-only host for the pref:
  let asciiHost = alternativeURI.asciiHost;
  // Normalize out a single trailing dot - NB: not using endsWith/lastIndexOf
  // because we need to be sure this last dot is the *only* dot, too.
  // More generally, this is used for the pref and should stay in sync with
  // the code in nsDefaultURIFixup::KeywordURIFixup .
  if (asciiHost.indexOf(".") == asciiHost.length - 1) {
    asciiHost = asciiHost.slice(0, -1);
  }

  let isIPv4Address = host => {
    let parts = host.split(".");
    if (parts.length != 4) {
      return false;
    }
    return parts.every(part => {
      let n = parseInt(part, 10);
      return n >= 0 && n <= 255;
    });
  };
  // Avoid showing fixup information if we're suggesting an IP. Note that
  // decimal representations of IPs are normalized to a 'regular'
  // dot-separated IP address by network code, but that only happens for
  // numbers that don't overflow. Longer numbers do not get normalized,
  // but still work to access IP addresses. So for instance,
  // 1097347366913 (ff7f000001) gets resolved by using the final bytes,
  // making it the same as 7f000001, which is 127.0.0.1 aka localhost.
  // While 2130706433 would get normalized by network, 1097347366913
  // does not, and we have to deal with both cases here:
  if (isIPv4Address(asciiHost) || /^(?:\d+|0x[a-f0-9]+)$/i.test(asciiHost))
    return;

  let onLookupComplete = (request, record, status) => {
    let browserRef = weakBrowser.get();
    if (!Components.isSuccessCode(status) || !browserRef)
      return;

    let currentURI = browserRef.currentURI;
    // If we're in case (3) (see above), don't show an info bar.
    if (!currentURI.equals(previousURI) &&
        !currentURI.equals(preferredURI)) {
      return;
    }

    // show infobar offering to visit the host
    let notificationBox = gBrowser.getNotificationBox(browserRef);
    if (notificationBox.getNotificationWithValue("keyword-uri-fixup"))
      return;

    let message = gNavigatorBundle.getFormattedString(
      "keywordURIFixup.message", [hostName]);
    let yesMessage = gNavigatorBundle.getFormattedString(
      "keywordURIFixup.goTo", [hostName])

    let buttons = [
      {
        label: yesMessage,
        accessKey: gNavigatorBundle.getString("keywordURIFixup.goTo.accesskey"),
        callback() {
          // Do not set this preference while in private browsing.
          if (!PrivateBrowsingUtils.isWindowPrivate(window)) {
            let pref = "browser.fixup.domainwhitelist." + asciiHost;
            Services.prefs.setBoolPref(pref, true);
          }
          openUILinkIn(alternativeURI.spec, "current");
        }
      },
      {
        label: gNavigatorBundle.getString("keywordURIFixup.dismiss"),
        accessKey: gNavigatorBundle.getString("keywordURIFixup.dismiss.accesskey"),
        callback() {
          let notification = notificationBox.getNotificationWithValue("keyword-uri-fixup");
          notificationBox.removeNotification(notification, true);
        }
      }
    ];
    let notification =
      notificationBox.appendNotification(message, "keyword-uri-fixup", null,
                                         notificationBox.PRIORITY_INFO_HIGH,
                                         buttons);
    notification.persistence = 1;
  };

  try {
    gDNSService.asyncResolve(hostName, 0, onLookupComplete, Services.tm.mainThread);
  } catch (ex) {
    // Do nothing if the URL is invalid (we don't want to show a notification in that case).
    if (ex.result != Cr.NS_ERROR_UNKNOWN_HOST) {
      // ... otherwise, report:
      Cu.reportError(ex);
    }
  }
}

function serializeInputStream(aStream) {
  let data = {
    content: NetUtil.readInputStreamToString(aStream, aStream.available()),
  };

  if (aStream instanceof Ci.nsIMIMEInputStream) {
    data.headers = new Map();
    aStream.visitHeaders((name, value) => {
      data.headers.set(name, value);
    });
  }

  return data;
}

// A shared function used by both remote and non-remote browser XBL bindings to
// load a URI or redirect it to the correct process.
function _loadURIWithFlags(browser, uri, params) {
  if (!uri) {
    uri = "about:blank";
  }
  let triggeringPrincipal = params.triggeringPrincipal || null;
  let flags = params.flags || 0;
  let referrer = params.referrerURI;
  let referrerPolicy = ("referrerPolicy" in params ? params.referrerPolicy :
                        Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
  let postData = params.postData;

  let currentRemoteType = browser.remoteType;
  let requiredRemoteType =
    E10SUtils.getRemoteTypeForURI(uri, gMultiProcessBrowser, currentRemoteType);
  let mustChangeProcess = requiredRemoteType != currentRemoteType;

  // !requiredRemoteType means we're loading in the parent/this process.
  if (!requiredRemoteType) {
    browser.inLoadURI = true;
  }
  try {
    if (!mustChangeProcess) {
      if (params.userContextId) {
        browser.webNavigation.setOriginAttributesBeforeLoading({ userContextId: params.userContextId });
      }

      browser.webNavigation.loadURIWithOptions(uri, flags,
                                               referrer, referrerPolicy,
                                               postData, null, null, triggeringPrincipal);
    } else {
      // Check if the current browser is allowed to unload.
      let {permitUnload, timedOut} = browser.permitUnload();
      if (!timedOut && !permitUnload) {
        return;
      }

      if (postData) {
        postData = serializeInputStream(postData);
      }

      let loadParams = {
        uri,
        triggeringPrincipal: triggeringPrincipal
          ? gSerializationHelper.serializeToString(triggeringPrincipal)
          : null,
        flags,
        referrer: referrer ? referrer.spec : null,
        referrerPolicy,
        postData
      }

      if (params.userContextId) {
        loadParams.userContextId = params.userContextId;
      }

      LoadInOtherProcess(browser, loadParams);
    }
  } catch (e) {
    // If anything goes wrong when switching remoteness, just switch remoteness
    // manually and load the URI.
    // We might lose history that way but at least the browser loaded a page.
    // This might be necessary if SessionStore wasn't initialized yet i.e.
    // when the homepage is a non-remote page.
    if (mustChangeProcess) {
      Cu.reportError(e);
      gBrowser.updateBrowserRemotenessByURL(browser, uri);

      if (params.userContextId) {
        browser.webNavigation.setOriginAttributesBeforeLoading({ userContextId: params.userContextId });
      }

      browser.webNavigation.loadURIWithOptions(uri, flags, referrer, referrerPolicy,
                                               postData, null, null, triggeringPrincipal);
    } else {
      throw e;
    }
  } finally {
    if (!requiredRemoteType) {
      browser.inLoadURI = false;
    }
  }
}

// Starts a new load in the browser first switching the browser to the correct
// process
function LoadInOtherProcess(browser, loadOptions, historyIndex = -1) {
  let tab = gBrowser.getTabForBrowser(browser);
  SessionStore.navigateAndRestore(tab, loadOptions, historyIndex);
}

// Called when a docshell has attempted to load a page in an incorrect process.
// This function is responsible for loading the page in the correct process.
function RedirectLoad({ target: browser, data }) {
  // We should only start the redirection if the browser window has finished
  // starting up. Otherwise, we should wait until the startup is done.
  if (gBrowserInit.delayedStartupFinished) {
    LoadInOtherProcess(browser, data.loadOptions, data.historyIndex);
  } else {
    let delayedStartupFinished = (subject, topic) => {
      if (topic == "browser-delayed-startup-finished" &&
          subject == window) {
        Services.obs.removeObserver(delayedStartupFinished, topic);
        LoadInOtherProcess(browser, data.loadOptions, data.historyIndex);
      }
    };
    Services.obs.addObserver(delayedStartupFinished,
                             "browser-delayed-startup-finished",
                             false);
  }
}

addEventListener("DOMContentLoaded", function onDCL() {
  removeEventListener("DOMContentLoaded", onDCL);

  // There are some windows, like macBrowserOverlay.xul, that
  // load browser.js, but never load tabbrowser.xml. We can ignore
  // those cases.
  if (!gBrowser || !gBrowser.updateBrowserRemoteness) {
    return;
  }

  window.QueryInterface(Ci.nsIInterfaceRequestor)
        .getInterface(nsIWebNavigation)
        .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
        .QueryInterface(Ci.nsIInterfaceRequestor)
        .getInterface(Ci.nsIXULWindow)
        .XULBrowserWindow = window.XULBrowserWindow;
  window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow =
    new nsBrowserAccess();

  let initBrowser =
    document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");

  // The window's first argument is a tab if and only if we are swapping tabs.
  // We must set the browser's usercontextid before updateBrowserRemoteness(),
  // so that the newly created remote tab child has the correct usercontextid.
  if (window.arguments) {
    let tabToOpen = window.arguments[0];
    if (tabToOpen instanceof XULElement && tabToOpen.hasAttribute("usercontextid")) {
      initBrowser.setAttribute("usercontextid", tabToOpen.getAttribute("usercontextid"));
    }
  }

  gBrowser.updateBrowserRemoteness(initBrowser, gMultiProcessBrowser);
});

var gBrowserInit = {
  delayedStartupFinished: false,

  onLoad() {
    gBrowser.addEventListener("DOMUpdatePageReport", gPopupBlockerObserver);

    Services.obs.addObserver(gPluginHandler.NPAPIPluginCrashed, "plugin-crashed", false);

    window.addEventListener("AppCommand", HandleAppCommandEvent, true);

    // These routines add message listeners. They must run before
    // loading the frame script to ensure that we don't miss any
    // message sent between when the frame script is loaded and when
    // the listener is registered.
    DOMLinkHandler.init();
    gPageStyleMenu.init();
    LanguageDetectionListener.init();
    BrowserOnClick.init();
    FeedHandler.init();
    CompactTheme.init();
    AboutPrivateBrowsingListener.init();
    TrackingProtection.init();
    RefreshBlocker.init();
    CaptivePortalWatcher.init();
    URLBarZoom.init(window);

    let mm = window.getGroupMessageManager("browsers");
    mm.loadFrameScript("chrome://browser/content/tab-content.js", true);
    mm.loadFrameScript("chrome://browser/content/content.js", true);
    mm.loadFrameScript("chrome://browser/content/content-UITour.js", true);
    mm.loadFrameScript("chrome://global/content/manifestMessages.js", true);

    // initialize observers and listeners
    // and give C++ access to gBrowser
    XULBrowserWindow.init();

    window.messageManager.addMessageListener("Browser:LoadURI", RedirectLoad);

    if (!gMultiProcessBrowser) {
      // There is a Content:Click message manually sent from content.
      Cc["@mozilla.org/eventlistenerservice;1"]
        .getService(Ci.nsIEventListenerService)
        .addSystemEventListener(gBrowser, "click", contentAreaClick, true);
    }

    // hook up UI through progress listener
    gBrowser.addProgressListener(window.XULBrowserWindow);
    gBrowser.addTabsProgressListener(window.TabsProgressListener);

    // setup simple gestures support
    gGestureSupport.init(true);

    // setup history swipe animation
    gHistorySwipeAnimation.init();

    SidebarUI.init();

    // Certain kinds of automigration rely on this notification to complete
    // their tasks BEFORE the browser window is shown. SessionStore uses it to
    // restore tabs into windows AFTER important parts like gMultiProcessBrowser
    // have been initialized.
    Services.obs.notifyObservers(window, "browser-window-before-show", "");

    // Set a sane starting width/height for all resolutions on new profiles.
    if (!document.documentElement.hasAttribute("width")) {
      const TARGET_WIDTH = 1280;
      const TARGET_HEIGHT = 1040;
      let width = Math.min(screen.availWidth * .9, TARGET_WIDTH);
      let height = Math.min(screen.availHeight * .9, TARGET_HEIGHT);

      document.documentElement.setAttribute("width", width);
      document.documentElement.setAttribute("height", height);

      if (width < TARGET_WIDTH && height < TARGET_HEIGHT) {
        document.documentElement.setAttribute("sizemode", "maximized");
      }
    }

    if (!window.toolbar.visible) {
      // adjust browser UI for popups
      gURLBar.setAttribute("readonly", "true");
      gURLBar.setAttribute("enablehistory", "false");
    }

    // Misc. inits.
    TabletModeUpdater.init();
    CombinedStopReload.init();
    gPrivateBrowsingUI.init();

    if (window.matchMedia("(-moz-os-version: windows-win8)").matches &&
        window.matchMedia("(-moz-windows-default-theme)").matches) {
      let windowFrameColor = new Color(...Cu.import("resource:///modules/Windows8WindowFrameColor.jsm", {})
                                            .Windows8WindowFrameColor.get());
      // Check if window frame color is dark.
      if ((windowFrameColor.r * 2 +
           windowFrameColor.g * 5 +
           windowFrameColor.b) <= 128 * 8) {
        document.documentElement.setAttribute("darkwindowframe", "true");
      }
    }

    ToolbarIconColor.init();

    // Wait until chrome is painted before executing code not critical to making the window visible
    this._boundDelayedStartup = this._delayedStartup.bind(this);
    window.addEventListener("MozAfterPaint", this._boundDelayedStartup);

    this._loadHandled = true;
  },

  _cancelDelayedStartup() {
    window.removeEventListener("MozAfterPaint", this._boundDelayedStartup);
    this._boundDelayedStartup = null;
  },

  _delayedStartup() {
    let tmp = {};
    Cu.import("resource://gre/modules/TelemetryTimestamps.jsm", tmp);
    let TelemetryTimestamps = tmp.TelemetryTimestamps;
    TelemetryTimestamps.add("delayedStartupStarted");

    this._cancelDelayedStartup();

    // We need to set the OfflineApps message listeners up before we
    // load homepages, which might need them.
    OfflineApps.init();

    // This pageshow listener needs to be registered before we may call
    // swapBrowsersAndCloseOther() to receive pageshow events fired by that.
    let mm = window.messageManager;
    mm.addMessageListener("PageVisibility:Show", function(message) {
      if (message.target == gBrowser.selectedBrowser) {
        setTimeout(pageShowEventHandlers, 0, message.data.persisted);
      }
    });

    gBrowser.addEventListener("AboutTabCrashedLoad", function(event) {
      let ownerDoc = event.originalTarget;

      if (!ownerDoc.documentURI.startsWith("about:tabcrashed")) {
        return;
      }

      let browser = gBrowser.getBrowserForDocument(event.target);
      // Reset the zoom for the tabcrashed page.
      ZoomManager.setZoomForBrowser(browser, 1);
    }, false, true);

    gBrowser.addEventListener("InsecureLoginFormsStateChange", function() {
      gIdentityHandler.refreshForInsecureLoginForms();
    });

    gBrowser.addEventListener("PermissionStateChange", function() {
      gIdentityHandler.refreshIdentityBlock();
    });

    let uriToLoad = this._getUriToLoad();
    if (uriToLoad && uriToLoad != "about:blank") {
      if (uriToLoad instanceof Ci.nsIArray) {
        let count = uriToLoad.length;
        let specs = [];
        for (let i = 0; i < count; i++) {
          let urisstring = uriToLoad.queryElementAt(i, Ci.nsISupportsString);
          specs.push(urisstring.data);
        }

        // This function throws for certain malformed URIs, so use exception handling
        // so that we don't disrupt startup
        try {
          gBrowser.loadTabs(specs, false, true);
        } catch (e) {}
      } else if (uriToLoad instanceof XULElement) {
        // swap the given tab with the default about:blank tab and then close
        // the original tab in the other window.
        let tabToOpen = uriToLoad;

        // If this tab was passed as a window argument, clear the
        // reference to it from the arguments array.
        if (window.arguments[0] == tabToOpen) {
          window.arguments[0] = null;
        }

        // Stop the about:blank load
        gBrowser.stop();
        // make sure it has a docshell
        gBrowser.docShell;

        // We must set usercontextid before updateBrowserRemoteness()
        // so that the newly created remote tab child has correct usercontextid
        if (tabToOpen.hasAttribute("usercontextid")) {
          let usercontextid = tabToOpen.getAttribute("usercontextid");
          gBrowser.selectedBrowser.setAttribute("usercontextid", usercontextid);
        }

        try {
          // Make sure selectedBrowser has the same remote settings as the one
          // we are swapping in.
          gBrowser.updateBrowserRemoteness(gBrowser.selectedBrowser,
                                           tabToOpen.linkedBrowser.isRemoteBrowser,
                                           { remoteType: tabToOpen.linkedBrowser.remoteType });
          gBrowser.swapBrowsersAndCloseOther(gBrowser.selectedTab, tabToOpen);
        } catch (e) {
          Cu.reportError(e);
        }
      } else if (window.arguments.length >= 3) {
        // window.arguments[2]: referrer (nsIURI | string)
        //                 [3]: postData (nsIInputStream)
        //                 [4]: allowThirdPartyFixup (bool)
        //                 [5]: referrerPolicy (int)
        //                 [6]: userContextId (int)
        //                 [7]: originPrincipal (nsIPrincipal)
        let referrerURI = window.arguments[2];
        if (typeof(referrerURI) == "string") {
          try {
            referrerURI = makeURI(referrerURI);
          } catch (e) {
            referrerURI = null;
          }
        }
        let referrerPolicy = (window.arguments[5] != undefined ?
            window.arguments[5] : Ci.nsIHttpChannel.REFERRER_POLICY_UNSET);
        let userContextId = (window.arguments[6] != undefined ?
            window.arguments[6] : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID);
        loadURI(uriToLoad, referrerURI, window.arguments[3] || null,
                window.arguments[4] || false, referrerPolicy, userContextId,
                // pass the origin principal (if any) and force its use to create
                // an initial about:blank viewer if present:
                window.arguments[7], !!window.arguments[7]);
        window.focus();
      } else {
        // Note: loadOneOrMoreURIs *must not* be called if window.arguments.length >= 3.
        // Such callers expect that window.arguments[0] is handled as a single URI.
        loadOneOrMoreURIs(uriToLoad);
      }
    }

    // Bug 778855 - Perf regression if we do this here. To be addressed in bug 779008.
    setTimeout(function() { SafeBrowsing.init(); }, 2000);

    Services.obs.addObserver(gIdentityHandler, "perm-changed", false);
    Services.obs.addObserver(gSessionHistoryObserver, "browser:purge-session-history", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-disabled", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-started", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-blocked", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-origin-blocked", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-failed", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-confirmation", false);
    Services.obs.addObserver(gXPInstallObserver, "addon-install-complete", false);
    window.messageManager.addMessageListener("Browser:URIFixup", gKeywordURIFixup);

    BrowserOffline.init();
    IndexedDBPromptHelper.init();

#ifdef E10S_TESTING_ONLY
    gRemoteTabsUI.init();
#endif
    // Initialize the full zoom setting.
    // We do this before the session restore service gets initialized so we can
    // apply full zoom settings to tabs restored by the session restore service.
    FullZoom.init();
    PanelUI.init();
    LightweightThemeListener.init();

    Services.telemetry.getHistogramById("E10S_WINDOW").add(gMultiProcessBrowser);

    SidebarUI.startDelayedLoad();

    UpdateUrlbarSearchSplitterState();

    if (!(isBlankPageURL(uriToLoad) || uriToLoad == "about:privatebrowsing") ||
        !focusAndSelectUrlBar()) {
      if (gBrowser.selectedBrowser.isRemoteBrowser) {
        // If the initial browser is remote, in order to optimize for first paint,
        // we'll defer switching focus to that browser until it has painted.
        let focusedElement = document.commandDispatcher.focusedElement;
        mm.addMessageListener("Browser:FirstPaint", function onFirstPaint() {
          mm.removeMessageListener("Browser:FirstPaint", onFirstPaint);
          // If focus didn't move while we were waiting for first paint, we're okay
          // to move to the browser.
          if (document.commandDispatcher.focusedElement == focusedElement) {
            gBrowser.selectedBrowser.focus();
          }
        });
      } else {
        // If the initial browser is not remote, we can focus the browser
        // immediately with no paint performance impact.
        gBrowser.selectedBrowser.focus();
      }
    }

    // Enable/Disable auto-hide tabbar
    gBrowser.tabContainer.updateVisibility();

    BookmarkingUI.init();
    AutoShowBookmarksToolbar.init();

    gPrefService.addObserver(gHomeButton.prefDomain, gHomeButton, false);

    var homeButton = document.getElementById("home-button");
    gHomeButton.updateTooltip(homeButton);

    let safeMode = document.getElementById("helpSafeMode");
    if (Services.appinfo.inSafeMode) {
      safeMode.label = safeMode.getAttribute("stoplabel");
      safeMode.accesskey = safeMode.getAttribute("stopaccesskey");
    }

    // BiDi UI
    gBidiUI = isBidiEnabled();
    if (gBidiUI) {
      document.getElementById("documentDirection-separator").hidden = false;
      document.getElementById("documentDirection-swap").hidden = false;
      document.getElementById("textfieldDirection-separator").hidden = false;
      document.getElementById("textfieldDirection-swap").hidden = false;
    }

    // Setup click-and-hold gestures access to the session history
    // menus if global click-and-hold isn't turned on
    if (!getBoolPref("ui.click_hold_context_menus", false))
      SetClickAndHoldHandlers();

    let NP = {};
    Cu.import("resource:///modules/NetworkPrioritizer.jsm", NP);
    NP.trackBrowserWindow(window);

    PlacesToolbarHelper.init();

    ctrlTab.readPref();
    gPrefService.addObserver(ctrlTab.prefName, ctrlTab, false);

    // Initialize the download manager some time after the app starts so that
    // auto-resume downloads begin (such as after crashing or quitting with
    // active downloads) and speeds up the first-load of the download manager UI.
    // If the user manually opens the download manager before the timeout, the
    // downloads will start right away, and initializing again won't hurt.
    setTimeout(function() {
      try {
        Cu.import("resource:///modules/DownloadsCommon.jsm", {})
          .DownloadsCommon.initializeAllDataLinks();
        Cu.import("resource:///modules/DownloadsTaskbar.jsm", {})
          .DownloadsTaskbar.registerIndicator(window);
      } catch (ex) {
        Cu.reportError(ex);
      }
    }, 10000);

    // Load the Login Manager data from disk off the main thread, some time
    // after startup.  If the data is required before the timeout, for example
    // because a restored page contains a password field, it will be loaded on
    // the main thread, and this initialization request will be ignored.
    setTimeout(function() {
      try {
        Services.logins;
      } catch (ex) {
        Cu.reportError(ex);
      }
    }, 3000);

    // The object handling the downloads indicator is also initialized here in the
    // delayed startup function, but the actual indicator element is not loaded
    // unless there are downloads to be displayed.
    DownloadsButton.initializeIndicator();

#ifndef XP_MACOSX
    updateEditUIVisibility();
    let placesContext = document.getElementById("placesContext");
    placesContext.addEventListener("popupshowing", updateEditUIVisibility);
    placesContext.addEventListener("popuphiding", updateEditUIVisibility);
#endif

    LightWeightThemeWebInstaller.init();

    if (Win7Features)
      Win7Features.onOpenWindow();

    FullScreen.init();
    PointerLock.init();

    // initialize the sync UI
    gSyncUI.init();
    gFxAccounts.init();

#ifdef MOZ_DATA_REPORTING
    gDataNotificationInfoBar.init();
#endif
    gBrowserThumbnails.init();

    gMenuButtonBadgeManager.init();

    gMenuButtonUpdateBadge.init();

    gExtensionsNotifications.init();

    let wasMinimized = window.windowState == window.STATE_MINIMIZED;
    window.addEventListener("sizemodechange", () => {
      let isMinimized = window.windowState == window.STATE_MINIMIZED;
      if (wasMinimized != isMinimized) {
        wasMinimized = isMinimized;
        UpdatePopupNotificationsVisibility();
      }
    });

    window.addEventListener("mousemove", MousePosTracker);
    window.addEventListener("dragover", MousePosTracker);

    gNavToolbox.addEventListener("customizationstarting", CustomizationHandler);
    gNavToolbox.addEventListener("customizationchange", CustomizationHandler);
    gNavToolbox.addEventListener("customizationending", CustomizationHandler);

    // End startup crash tracking after a delay to catch crashes while restoring
    // tabs and to postpone saving the pref to disk.
    try {
      const startupCrashEndDelay = 30 * 1000;
      setTimeout(Services.startup.trackStartupCrashEnd, startupCrashEndDelay);
    } catch (ex) {
      Cu.reportError("Could not end startup crash tracking: " + ex);
    }

    // Delay this a minute because there's no rush
    setTimeout(() => {
      this.gmpInstallManager = new GMPInstallManager();
      // We don't really care about the results, if someone is interested they
      // can check the log.
      this.gmpInstallManager.simpleCheckAndInstall().then(null, () => {});
    }, 1000 * 60);

    // Report via telemetry whether we're able to play MP4/H.264/AAC video.
    // We suspect that some Windows users have a broken or have not installed
    // Windows Media Foundation, and we'd like to know how many. We'd also like
    // to know how good our coverage is on other platforms.
    // Note: we delay by 90 seconds reporting this, as calling canPlayType()
    // on Windows will cause DLLs to load, i.e. cause disk I/O.
    setTimeout(() => {
      let v = document.createElementNS("http://www.w3.org/1999/xhtml", "video");
      let aacWorks = v.canPlayType("audio/mp4") != "";
      Services.telemetry.getHistogramById("VIDEO_CAN_CREATE_AAC_DECODER").add(aacWorks);
      let h264Works = v.canPlayType("video/mp4") != "";
      Services.telemetry.getHistogramById("VIDEO_CAN_CREATE_H264_DECODER").add(h264Works);
    }, 90 * 1000);

    SessionStore.promiseInitialized.then(() => {
      // Bail out if the window has been closed in the meantime.
      if (window.closed) {
        return;
      }

      // Enable the Restore Last Session command if needed
      RestoreLastSessionObserver.init();

      // Start monitoring slow add-ons
      AddonWatcher.init();

      // Telemetry for master-password - we do this after 5 seconds as it
      // can cause IO if NSS/PSM has not already initialized.
      setTimeout(() => {
        if (window.closed) {
          return;
        }
        let tokenDB = Cc["@mozilla.org/security/pk11tokendb;1"]
                        .getService(Ci.nsIPK11TokenDB);
        let token = tokenDB.getInternalKeyToken();
        let mpEnabled = token.hasPassword;
        if (mpEnabled) {
          Services.telemetry.getHistogramById("MASTER_PASSWORD_ENABLED").add(mpEnabled);
        }
      }, 5000);

      PanicButtonNotifier.init();
    });

    gBrowser.tabContainer.addEventListener("TabSelect", function() {
      for (let panel of document.querySelectorAll("panel[tabspecific='true']")) {
        if (panel.state == "open") {
          panel.hidePopup();
        }
      }
    });

    this.delayedStartupFinished = true;

    Services.obs.notifyObservers(window, "browser-delayed-startup-finished", "");
    TelemetryTimestamps.add("delayedStartupFinished");
  },

  // Returns the URI(s) to load at startup.
  _getUriToLoad() {
    // window.arguments[0]: URI to load (string), or an nsIArray of
    //                      nsISupportsStrings to load, or a xul:tab of
    //                      a tabbrowser, which will be replaced by this
    //                      window (for this case, all other arguments are
    //                      ignored).
    if (!window.arguments || !window.arguments[0])
      return null;

    let uri = window.arguments[0];
    let sessionStartup = Cc["@mozilla.org/browser/sessionstartup;1"]
                           .getService(Ci.nsISessionStartup);
    let defaultArgs = Cc["@mozilla.org/browser/clh;1"]
                        .getService(Ci.nsIBrowserHandler)
                        .defaultArgs;

    // If the given URI matches defaultArgs (the default homepage) we want
    // to block its load if we're going to restore a session anyway.
    if (uri == defaultArgs && sessionStartup.willOverrideHomepage)
      return null;

    return uri;
  },

  onUnload() {
    // In certain scenarios it's possible for unload to be fired before onload,
    // (e.g. if the window is being closed after browser.js loads but before the
    // load completes). In that case, there's nothing to do here.
    if (!this._loadHandled)
      return;

    // First clean up services initialized in gBrowserInit.onLoad (or those whose
    // uninit methods don't depend on the services having been initialized).

    CombinedStopReload.uninit();

    gGestureSupport.init(false);

    gHistorySwipeAnimation.uninit();

    FullScreen.uninit();

    gFxAccounts.uninit();

    gExtensionsNotifications.uninit();

    Services.obs.removeObserver(gPluginHandler.NPAPIPluginCrashed, "plugin-crashed");

    try {
      gBrowser.removeProgressListener(window.XULBrowserWindow);
      gBrowser.removeTabsProgressListener(window.TabsProgressListener);
    } catch (ex) {
    }

    PlacesToolbarHelper.uninit();

    BookmarkingUI.uninit();

    TabsInTitlebar.uninit();

    ToolbarIconColor.uninit();

    TabletModeUpdater.uninit();

    gTabletModePageCounter.finish();

    BrowserOnClick.uninit();

    FeedHandler.uninit();

    CompactTheme.uninit();

    TrackingProtection.uninit();

    RefreshBlocker.uninit();

    CaptivePortalWatcher.uninit();

    gMenuButtonUpdateBadge.uninit();

    gMenuButtonBadgeManager.uninit();

    SidebarUI.uninit();

    // Now either cancel delayedStartup, or clean up the services initialized from
    // it.
    if (this._boundDelayedStartup) {
      this._cancelDelayedStartup();
    } else {
      if (Win7Features)
        Win7Features.onCloseWindow();

      gPrefService.removeObserver(ctrlTab.prefName, ctrlTab);
      ctrlTab.uninit();
      gBrowserThumbnails.uninit();
      FullZoom.destroy();

      Services.obs.removeObserver(gIdentityHandler, "perm-changed");
      Services.obs.removeObserver(gSessionHistoryObserver, "browser:purge-session-history");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-disabled");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-started");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-blocked");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-origin-blocked");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-failed");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-confirmation");
      Services.obs.removeObserver(gXPInstallObserver, "addon-install-complete");
      window.messageManager.removeMessageListener("Browser:URIFixup", gKeywordURIFixup);
      window.messageManager.removeMessageListener("Browser:LoadURI", RedirectLoad);

      try {
        gPrefService.removeObserver(gHomeButton.prefDomain, gHomeButton);
      } catch (ex) {
        Cu.reportError(ex);
      }

      if (this.gmpInstallManager) {
        this.gmpInstallManager.uninit();
      }

      BrowserOffline.uninit();
      IndexedDBPromptHelper.uninit();
      LightweightThemeListener.uninit();
      PanelUI.uninit();
      AutoShowBookmarksToolbar.uninit();
    }

    // Final window teardown, do this last.
    window.XULBrowserWindow = null;
    window.QueryInterface(Ci.nsIInterfaceRequestor)
          .getInterface(Ci.nsIWebNavigation)
          .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
          .QueryInterface(Ci.nsIInterfaceRequestor)
          .getInterface(Ci.nsIXULWindow)
          .XULBrowserWindow = null;
    window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow = null;
  },
};

#ifdef XP_MACOSX
// nonBrowserWindowStartup(), nonBrowserWindowDelayedStartup(), and
// nonBrowserWindowShutdown() are used for non-browser windows in
// macBrowserOverlay
gBrowserInit.nonBrowserWindowStartup = function() {
  // Disable inappropriate commands / submenus
  var disabledItems = ["Browser:SavePage",
                       "Browser:SendLink", "cmd_pageSetup", "cmd_print", "cmd_find", "cmd_findAgain",
                       "viewToolbarsMenu", "viewSidebarMenuMenu", "Browser:Reload",
                       "viewFullZoomMenu", "pageStyleMenu", "charsetMenu", "View:PageSource", "View:FullScreen",
                       "viewHistorySidebar", "Browser:AddBookmarkAs", "Browser:BookmarkAllTabs",
                       "View:PageInfo"];
  var element;

  for (let disabledItem of disabledItems) {
    element = document.getElementById(disabledItem);
    if (element)
      element.setAttribute("disabled", "true");
  }

  // If no windows are active (i.e. we're the hidden window), disable the close, minimize
  // and zoom menu commands as well
  if (window.location.href == "chrome://browser/content/hiddenWindow.xul") {
    var hiddenWindowDisabledItems = ["cmd_close", "minimizeWindow", "zoomWindow"];
    for (let hiddenWindowDisabledItem of hiddenWindowDisabledItems) {
      element = document.getElementById(hiddenWindowDisabledItem);
      if (element)
        element.setAttribute("disabled", "true");
    }

    // also hide the window-list separator
    element = document.getElementById("sep-window-list");
    element.setAttribute("hidden", "true");

    // Setup the dock menu.
    let dockMenuElement = document.getElementById("menu_mac_dockmenu");
    if (dockMenuElement != null) {
      let nativeMenu = Cc["@mozilla.org/widget/standalonenativemenu;1"]
                       .createInstance(Ci.nsIStandaloneNativeMenu);

      try {
        nativeMenu.init(dockMenuElement);

        let dockSupport = Cc["@mozilla.org/widget/macdocksupport;1"]
                          .getService(Ci.nsIMacDockSupport);
        dockSupport.dockMenu = nativeMenu;
      } catch (e) {
      }
    }
  }

  if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
    document.getElementById("macDockMenuNewWindow").hidden = true;
  }

  this._delayedStartupTimeoutId = setTimeout(this.nonBrowserWindowDelayedStartup.bind(this), 0);
};

gBrowserInit.nonBrowserWindowDelayedStartup = function() {
  this._delayedStartupTimeoutId = null;

  // initialise the offline listener
  BrowserOffline.init();

  // initialize the private browsing UI
  gPrivateBrowsingUI.init();

  // initialize the sync UI
  gSyncUI.init();

#ifdef E10S_TESTING_ONLY
  gRemoteTabsUI.init();
#endif
};

gBrowserInit.nonBrowserWindowShutdown = function() {
  let dockSupport = Cc["@mozilla.org/widget/macdocksupport;1"]
                    .getService(Ci.nsIMacDockSupport);
  dockSupport.dockMenu = null;

  // If nonBrowserWindowDelayedStartup hasn't run yet, we have no work to do -
  // just cancel the pending timeout and return;
  if (this._delayedStartupTimeoutId) {
    clearTimeout(this._delayedStartupTimeoutId);
    return;
  }

  BrowserOffline.uninit();
};
#endif


/* Legacy global init functions */
var BrowserStartup        = gBrowserInit.onLoad.bind(gBrowserInit);
var BrowserShutdown       = gBrowserInit.onUnload.bind(gBrowserInit);

#ifdef XP_MACOSX
var nonBrowserWindowStartup        = gBrowserInit.nonBrowserWindowStartup.bind(gBrowserInit);
var nonBrowserWindowDelayedStartup = gBrowserInit.nonBrowserWindowDelayedStartup.bind(gBrowserInit);
var nonBrowserWindowShutdown       = gBrowserInit.nonBrowserWindowShutdown.bind(gBrowserInit);
#endif

function HandleAppCommandEvent(evt) {
  switch (evt.command) {
  case "Back":
    BrowserBack();
    break;
  case "Forward":
    BrowserForward();
    break;
  case "Reload":
    BrowserReloadSkipCache();
    break;
  case "Stop":
    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
      BrowserStop();
    break;
  case "Search":
    BrowserSearch.webSearch();
    break;
  case "Bookmarks":
    SidebarUI.toggle("viewBookmarksSidebar");
    break;
  case "Home":
    BrowserHome();
    break;
  case "New":
    BrowserOpenTab();
    break;
  case "Close":
    BrowserCloseTabOrWindow();
    break;
  case "Find":
    gFindBar.onFindCommand();
    break;
  case "Help":
    openHelpLink("firefox-help");
    break;
  case "Open":
    BrowserOpenFileWindow();
    break;
  case "Print":
    PrintUtils.printWindow(gBrowser.selectedBrowser.outerWindowID,
                           gBrowser.selectedBrowser);
    break;
  case "Save":
    saveBrowser(gBrowser.selectedBrowser);
    break;
  case "SendMail":
    MailIntegration.sendLinkForBrowser(gBrowser.selectedBrowser);
    break;
  default:
    return;
  }
  evt.stopPropagation();
  evt.preventDefault();
}

function gotoHistoryIndex(aEvent) {
  let index = aEvent.target.getAttribute("index");
  if (!index)
    return false;

  let where = whereToOpenLink(aEvent);

  if (where == "current") {
    // Normal click. Go there in the current tab and update session history.

    try {
      gBrowser.gotoIndex(index);
    } catch (ex) {
      return false;
    }
    return true;
  }
  // Modified click. Go there in a new tab/window.

  let historyindex = aEvent.target.getAttribute("historyindex");
  duplicateTabIn(gBrowser.selectedTab, where, Number(historyindex));
  return true;
}

function BrowserForward(aEvent) {
  let where = whereToOpenLink(aEvent, false, true);

  if (where == "current") {
    try {
      gBrowser.goForward();
    } catch (ex) {
    }
  } else {
    duplicateTabIn(gBrowser.selectedTab, where, 1);
  }
}

function BrowserBack(aEvent) {
  let where = whereToOpenLink(aEvent, false, true);

  if (where == "current") {
    try {
      gBrowser.goBack();
    } catch (ex) {
    }
  } else {
    duplicateTabIn(gBrowser.selectedTab, where, -1);
  }
}

function BrowserHandleBackspace() {
  switch (gPrefService.getIntPref("browser.backspace_action")) {
  case 0:
    BrowserBack();
    break;
  case 1:
    goDoCommand("cmd_scrollPageUp");
    break;
  }
}

function BrowserHandleShiftBackspace() {
  switch (gPrefService.getIntPref("browser.backspace_action")) {
  case 0:
    BrowserForward();
    break;
  case 1:
    goDoCommand("cmd_scrollPageDown");
    break;
  }
}

function BrowserStop() {
  const stopFlags = nsIWebNavigation.STOP_ALL;
  gBrowser.webNavigation.stop(stopFlags);
}

function BrowserReloadOrDuplicate(aEvent) {
#ifdef XP_MACOSX
  let metaKeyPressed = aEvent.metaKey;
#else
  let metaKeyPressed = aEvent.ctrlKey;
#endif
  var backgroundTabModifier = aEvent.button == 1 || metaKeyPressed;

  if (aEvent.shiftKey && !backgroundTabModifier) {
    BrowserReloadSkipCache();
    return;
  }

  let where = whereToOpenLink(aEvent, false, true);
  if (where == "current")
    BrowserReload();
  else
    duplicateTabIn(gBrowser.selectedTab, where);
}

function BrowserReload() {
  if (gBrowser.currentURI.schemeIs("view-source")) {
    // Bug 1167797: For view source, we always skip the cache
    return BrowserReloadSkipCache();
  }
  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_NONE;
  BrowserReloadWithFlags(reloadFlags);
}

function BrowserReloadSkipCache() {
  // Bypass proxy and cache.
  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY | nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE;
  BrowserReloadWithFlags(reloadFlags);
}

var BrowserHome = BrowserGoHome;
function BrowserGoHome(aEvent) {
  if (aEvent && "button" in aEvent &&
      aEvent.button == 2) // right-click: do nothing
    return;

  var homePage = gHomeButton.getHomePage();
  var where = whereToOpenLink(aEvent, false, true);
  var urls;

  // Home page should open in a new tab when current tab is an app tab
  if (where == "current" &&
      gBrowser &&
      gBrowser.selectedTab.pinned)
    where = "tab";

  // openUILinkIn in utilityOverlay.js doesn't handle loading multiple pages
  switch (where) {
  case "current":
    loadOneOrMoreURIs(homePage);
    break;
  case "tabshifted":
  case "tab":
    urls = homePage.split("|");
    var loadInBackground = getBoolPref("browser.tabs.loadBookmarksInBackground", false);
    gBrowser.loadTabs(urls, loadInBackground);
    break;
  case "window":
    OpenBrowserWindow();
    break;
  }
}

function loadOneOrMoreURIs(aURIString) {
  // we're not a browser window, pass the URI string to a new browser window
  if (window.location.href != getBrowserURL()) {
    window.openDialog(getBrowserURL(), "_blank", "all,dialog=no", aURIString);
    return;
  }

  // This function throws for certain malformed URIs, so use exception handling
  // so that we don't disrupt startup
  try {
    gBrowser.loadTabs(aURIString.split("|"), false, true);
  } catch (e) {
  }
}

function focusAndSelectUrlBar() {
  // In customize mode, the url bar is disabled. If a new tab is opened or the
  // user switches to a different tab, this function gets called before we've
  // finished leaving customize mode, and the url bar will still be disabled.
  // We can't focus it when it's disabled, so we need to re-run ourselves when
  // we've finished leaving customize mode.
  if (CustomizationHandler.isExitingCustomizeMode) {
    gNavToolbox.addEventListener("aftercustomization", function afterCustomize() {
      gNavToolbox.removeEventListener("aftercustomization", afterCustomize);
      focusAndSelectUrlBar();
    });

    return true;
  }

  if (gURLBar) {
    if (window.fullScreen)
      FullScreen.showNavToolbox();

    gURLBar.select();
    if (document.activeElement == gURLBar.inputField)
      return true;
  }
  return false;
}

function openLocation() {
  if (focusAndSelectUrlBar())
    return;

  if (window.location.href != getBrowserURL()) {
    var win = getTopWin();
    if (win) {
      // If there's an open browser window, it should handle this command
      win.focus()
      win.openLocation();
    } else {
      // If there are no open browser windows, open a new one
      window.openDialog("chrome://browser/content/", "_blank",
                        "chrome,all,dialog=no", BROWSER_NEW_TAB_URL);
    }
  }
}

function BrowserOpenTab(event) {
  let where = "tab";
  let relatedToCurrent = false;

  if (event) {
    where = whereToOpenLink(event, false, true);

    switch (where) {
      case "tab":
      case "tabshifted":
        // When accel-click or middle-click are used, open the new tab as
        // related to the current tab.
        relatedToCurrent = true;
        break;
      case "current":
        where = "tab";
        break;
    }
  }

  openUILinkIn(BROWSER_NEW_TAB_URL, where, { relatedToCurrent });
}

/* Called from the openLocation dialog. This allows that dialog to instruct
   its opener to open a new window and then step completely out of the way.
   Anything less byzantine is causing horrible crashes, rather believably,
   though oddly only on Linux. */
function delayedOpenWindow(chrome, flags, href, postData) {
  // The other way to use setTimeout,
  // setTimeout(openDialog, 10, chrome, "_blank", flags, url),
  // doesn't work here.  The extra "magic" extra argument setTimeout adds to
  // the callback function would confuse gBrowserInit.onLoad() by making
  // window.arguments[1] be an integer instead of null.
  setTimeout(function() { openDialog(chrome, "_blank", flags, href, null, null, postData); }, 10);
}

/* Required because the tab needs time to set up its content viewers and get the load of
   the URI kicked off before becoming the active content area. */
function delayedOpenTab(aUrl, aReferrer, aCharset, aPostData, aAllowThirdPartyFixup) {
  gBrowser.loadOneTab(aUrl, {
                      referrerURI: aReferrer,
                      charset: aCharset,
                      postData: aPostData,
                      inBackground: false,
                      allowThirdPartyFixup: aAllowThirdPartyFixup});
}

var gLastOpenDirectory = {
  _lastDir: null,
  get path() {
    if (!this._lastDir || !this._lastDir.exists()) {
      try {
        this._lastDir = gPrefService.getComplexValue("browser.open.lastDir",
                                                     Ci.nsILocalFile);
        if (!this._lastDir.exists())
          this._lastDir = null;
      } catch (e) {}
    }
    return this._lastDir;
  },
  set path(val) {
    try {
      if (!val || !val.isDirectory())
        return;
    } catch (e) {
      return;
    }
    this._lastDir = val.clone();

    // Don't save the last open directory pref inside the Private Browsing mode
    if (!PrivateBrowsingUtils.isWindowPrivate(window))
      gPrefService.setComplexValue("browser.open.lastDir", Ci.nsILocalFile,
                                   this._lastDir);
  },
  reset() {
    this._lastDir = null;
  }
};

function BrowserOpenFileWindow() {
  // Get filepicker component.
  try {
    const nsIFilePicker = Ci.nsIFilePicker;
    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
    let fpCallback = function fpCallback_done(aResult) {
      if (aResult == nsIFilePicker.returnOK) {
        try {
          if (fp.file) {
            gLastOpenDirectory.path =
              fp.file.parent.QueryInterface(Ci.nsILocalFile);
          }
        } catch (ex) {
        }
        openUILinkIn(fp.fileURL.spec, "current");
      }
    };

    fp.init(window, gNavigatorBundle.getString("openFile"),
            nsIFilePicker.modeOpen);
    fp.appendFilters(nsIFilePicker.filterAll | nsIFilePicker.filterText |
                     nsIFilePicker.filterImages | nsIFilePicker.filterXML |
                     nsIFilePicker.filterHTML);
    fp.displayDirectory = gLastOpenDirectory.path;
    fp.open(fpCallback);
  } catch (ex) {
  }
}

function BrowserCloseTabOrWindow() {
  // If we're not a browser window, just close the window
  if (window.location.href != getBrowserURL()) {
    closeWindow(true);
    return;
  }

  // If the current tab is the last one, this will close the window.
  gBrowser.removeCurrentTab({animate: true});
}

function BrowserTryToCloseWindow() {
  if (WindowIsClosing())
    window.close();     // WindowIsClosing does all the necessary checks
}

function loadURI(uri, referrer, postData, allowThirdPartyFixup, referrerPolicy,
                 userContextId, originPrincipal, forceAboutBlankViewerInCurrent) {
  try {
    openLinkIn(uri, "current",
               { referrerURI: referrer,
                 referrerPolicy,
                 postData,
                 allowThirdPartyFixup,
                 userContextId,
                 originPrincipal,
                 forceAboutBlankViewerInCurrent,
               });
  } catch (e) {}
}

/**
 * Given a string, will generate a more appropriate urlbar value if a Places
 * keyword or a search alias is found at the beginning of it.
 *
 * @param url
 *        A string that may begin with a keyword or an alias.
 *
 * @return {Promise}
 * @resolves { url, postData, mayInheritPrincipal }. If it's not possible
 *           to discern a keyword or an alias, url will be the input string.
 */
function getShortcutOrURIAndPostData(url, callback = null) {
  if (callback) {
    Deprecated.warning("Please use the Promise returned by " +
                       "getShortcutOrURIAndPostData() instead of passing a " +
                       "callback",
                       "https://bugzilla.mozilla.org/show_bug.cgi?id=1100294");
  }
  return Task.spawn(function* () {
    let mayInheritPrincipal = false;
    let postData = null;
    // Split on the first whitespace.
    let [keyword, param = ""] = url.trim().split(/\s(.+)/, 2);

    if (!keyword) {
      return { url, postData, mayInheritPrincipal };
    }

    let engine = Services.search.getEngineByAlias(keyword);
    if (engine) {
      let submission = engine.getSubmission(param, null, "keyword");
      return { url: submission.uri.spec,
               postData: submission.postData,
               mayInheritPrincipal };
    }

    // A corrupt Places database could make this throw, breaking navigation
    // from the location bar.
    let entry = null;
    try {
      entry = yield PlacesUtils.keywords.fetch(keyword);
    } catch (ex) {
      Cu.reportError(`Unable to fetch Places keyword "${keyword}": ${ex}`);
    }
    if (!entry || !entry.url) {
      // This is not a Places keyword.
      return { url, postData, mayInheritPrincipal };
    }

    try {
      [url, postData] =
        yield BrowserUtils.parseUrlAndPostData(entry.url.href,
                                               entry.postData,
                                               param);
      if (postData) {
        postData = getPostDataStream(postData);
      }

      // Since this URL came from a bookmark, it's safe to let it inherit the
      // current document's principal.
      mayInheritPrincipal = true;
    } catch (ex) {
      // It was not possible to bind the param, just use the original url value.
    }

    return { url, postData, mayInheritPrincipal };
  }).then(data => {
    if (callback) {
      callback(data);
    }
    return data;
  });
}

function getPostDataStream(aPostDataString,
                           aType = "application/x-www-form-urlencoded") {
  let dataStream = Cc["@mozilla.org/io/string-input-stream;1"]
                     .createInstance(Ci.nsIStringInputStream);
  dataStream.data = aPostDataString;

  let mimeStream = Cc["@mozilla.org/network/mime-input-stream;1"]
                     .createInstance(Ci.nsIMIMEInputStream);
  mimeStream.addHeader("Content-Type", aType);
  mimeStream.addContentLength = true;
  mimeStream.setData(dataStream);
  return mimeStream.QueryInterface(Ci.nsIInputStream);
}

function getLoadContext() {
  return window.QueryInterface(Ci.nsIInterfaceRequestor)
               .getInterface(Ci.nsIWebNavigation)
               .QueryInterface(Ci.nsILoadContext);
}

function readFromClipboard() {
  var url;

  try {
    // Create transferable that will transfer the text.
    var trans = Components.classes["@mozilla.org/widget/transferable;1"]
                          .createInstance(Components.interfaces.nsITransferable);
    trans.init(getLoadContext());

    trans.addDataFlavor("text/unicode");

    // If available, use selection clipboard, otherwise global one
    if (Services.clipboard.supportsSelectionClipboard())
      Services.clipboard.getData(trans, Services.clipboard.kSelectionClipboard);
    else
      Services.clipboard.getData(trans, Services.clipboard.kGlobalClipboard);

    var data = {};
    var dataLen = {};
    trans.getTransferData("text/unicode", data, dataLen);

    if (data) {
      data = data.value.QueryInterface(Components.interfaces.nsISupportsString);
      url = data.data.substring(0, dataLen.value / 2);
    }
  } catch (ex) {
  }

  return url;
}

/**
 * Open the View Source dialog.
 *
 * @param aArgsOrDocument
 *        Either an object or a Document. Passing a Document is deprecated,
 *        and is not supported with e10s. This function will throw if
 *        aArgsOrDocument is a CPOW.
 *
 *        If aArgsOrDocument is an object, that object can take the
 *        following properties:
 *
 *        URL (required):
 *          A string URL for the page we'd like to view the source of.
 *        browser (optional):
 *          The browser containing the document that we would like to view the
 *          source of. This is required if outerWindowID is passed.
 *        outerWindowID (optional):
 *          The outerWindowID of the content window containing the document that
 *          we want to view the source of. You only need to provide this if you
 *          want to attempt to retrieve the document source from the network
 *          cache.
 *        lineNumber (optional):
 *          The line number to focus on once the source is loaded.
 */
function BrowserViewSourceOfDocument(aArgsOrDocument) {
  let args;

  if (aArgsOrDocument instanceof Document) {
    let doc = aArgsOrDocument;
    // Deprecated API - callers should pass args object instead.
    if (Cu.isCrossProcessWrapper(doc)) {
      throw new Error("BrowserViewSourceOfDocument cannot accept a CPOW " +
                      "as a document.");
    }

    let requestor = doc.defaultView
                       .QueryInterface(Ci.nsIInterfaceRequestor);
    let browser = requestor.getInterface(Ci.nsIWebNavigation)
                           .QueryInterface(Ci.nsIDocShell)
                           .chromeEventHandler;
    let outerWindowID = requestor.getInterface(Ci.nsIDOMWindowUtils)
                                 .outerWindowID;
    let URL = browser.currentURI.spec;
    args = { browser, outerWindowID, URL };
  } else {
    args = aArgsOrDocument;
  }

  let viewInternal = () => {
    let inTab = Services.prefs.getBoolPref("view_source.tab");
    if (inTab) {
      let tabBrowser = gBrowser;
      let preferredRemoteType;
      if (!tabBrowser) {
        if (!args.browser) {
          throw new Error("BrowserViewSourceOfDocument should be passed the " +
                          "subject browser if called from a window without " +
                          "gBrowser defined.");
        }
        preferredRemoteType = args.browser.remoteType;
      } else {
        // Some internal URLs (such as specific chrome: and about: URLs that are
        // not yet remote ready) cannot be loaded in a remote browser.  View
        // source in tab expects the new view source browser's remoteness to match
        // that of the original URL, so disable remoteness if necessary for this
        // URL.
        preferredRemoteType =
          E10SUtils.getRemoteTypeForURI(args.URL, gMultiProcessBrowser);
      }

      // In the case of popups, we need to find a non-popup browser window.
      if (!tabBrowser || !window.toolbar.visible) {
        // This returns only non-popup browser windows by default.
        let browserWindow = RecentWindow.getMostRecentBrowserWindow();
        tabBrowser = browserWindow.gBrowser;
      }

      // `viewSourceInBrowser` will load the source content from the page
      // descriptor for the tab (when possible) or fallback to the network if
      // that fails.  Either way, the view source module will manage the tab's
      // location, so use "about:blank" here to avoid unnecessary redundant
      // requests.
      let tab = tabBrowser.loadOneTab("about:blank", {
        relatedToCurrent: true,
        inBackground: false,
        preferredRemoteType,
        relatedBrowser: args.browser
      });
      args.viewSourceBrowser = tabBrowser.getBrowserForTab(tab);
      top.gViewSourceUtils.viewSourceInBrowser(args);
    } else {
      top.gViewSourceUtils.viewSource(args);
    }
  }

  // Check if external view source is enabled.  If so, try it.  If it fails,
  // fallback to internal view source.
  if (Services.prefs.getBoolPref("view_source.editor.external")) {
    top.gViewSourceUtils
       .openInExternalEditor(args, null, null, null, result => {
      if (!result) {
        viewInternal();
      }
    });
  } else {
    // Display using internal view source
    viewInternal();
  }
}

/**
 * Opens the View Source dialog for the source loaded in the root
 * top-level document of the browser. This is really just a
 * convenience wrapper around BrowserViewSourceOfDocument.
 *
 * @param browser
 *        The browser that we want to load the source of.
 */
function BrowserViewSource(browser) {
  BrowserViewSourceOfDocument({
    browser,
    outerWindowID: browser.outerWindowID,
    URL: browser.currentURI.spec,
  });
}

// documentURL - URL of the document to view, or null for this window's document
// initialTab - name of the initial tab to display, or null for the first tab
// imageElement - image to load in the Media Tab of the Page Info window; can be null/omitted
// frameOuterWindowID - the id of the frame that the context menu opened in; can be null/omitted
// browser - the browser containing the document we're interested in inspecting; can be null/omitted
function BrowserPageInfo(documentURL, initialTab, imageElement, frameOuterWindowID, browser) {
  if (documentURL instanceof HTMLDocument) {
    Deprecated.warning("Please pass the location URL instead of the document " +
                       "to BrowserPageInfo() as the first argument.",
                       "https://bugzilla.mozilla.org/show_bug.cgi?id=1238180");
    documentURL = documentURL.location;
  }

  let args = { initialTab, imageElement, frameOuterWindowID, browser };
  var windows = Services.wm.getEnumerator("Browser:page-info");

  documentURL = documentURL || window.gBrowser.selectedBrowser.currentURI.spec;

  // Check for windows matching the url
  while (windows.hasMoreElements()) {
    var currentWindow = windows.getNext();
    if (currentWindow.closed) {
      continue;
    }
    if (currentWindow.document.documentElement.getAttribute("relatedUrl") == documentURL) {
      currentWindow.focus();
      currentWindow.resetPageInfo(args);
      return currentWindow;
    }
  }

  // We didn't find a matching window, so open a new one.
  return openDialog("chrome://browser/content/pageinfo/pageInfo.xul", "",
                    "chrome,toolbar,dialog=no,resizable", args);
}

/**
 * Sets the URI to display in the location bar.
 *
 * @param aURI [optional]
 *        nsIURI to set. If this is unspecified, the current URI will be used.
 */
function URLBarSetURI(aURI) {
  var value = gBrowser.userTypedValue;
  var valid = false;

  if (value == null) {
    let uri = aURI || gBrowser.currentURI;
    // Strip off "wyciwyg://" and passwords for the location bar
    try {
      uri = Services.uriFixup.createExposableURI(uri);
    } catch (e) {}

    // Replace initial page URIs with an empty string
    // 1. only if there's no opener (bug 370555).
    // 2. if remote newtab is enabled and it's the default remote newtab page
    let defaultRemoteURL = gAboutNewTabService.remoteEnabled &&
                           uri.spec === gAboutNewTabService.newTabURL;
    if ((gInitialPages.includes(uri.spec) || defaultRemoteURL) &&
        checkEmptyPageOrigin(gBrowser.selectedBrowser, uri)) {
      value = "";
    } else {
      // We should deal with losslessDecodeURI throwing for exotic URIs
      try {
        value = losslessDecodeURI(uri);
      } catch (ex) {
        value = "about:blank";
      }
    }

    valid = !isBlankPageURL(uri.spec);
  }

  let isDifferentValidValue = valid && value != gURLBar.value;
  gURLBar.value = value;
  gURLBar.valueIsTyped = !valid;
  if (isDifferentValidValue) {
    gURLBar.selectionStart = gURLBar.selectionEnd = 0;
  }

  SetPageProxyState(valid ? "valid" : "invalid");
}

function losslessDecodeURI(aURI) {
  let scheme = aURI.scheme;
  if (scheme == "moz-action")
    throw new Error("losslessDecodeURI should never get a moz-action URI");

  var value = aURI.spec;

  let decodeASCIIOnly = !["https", "http", "file", "ftp"].includes(scheme);
  // Try to decode as UTF-8 if there's no encoding sequence that we would break.
  if (!/%25(?:3B|2F|3F|3A|40|26|3D|2B|24|2C|23)/i.test(value)) {
    if (decodeASCIIOnly) {
      // This only decodes ascii characters (hex) 20-7e, except 25 (%).
      // This avoids both cases stipulated below (%-related issues, and \r, \n
      // and \t, which would be %0d, %0a and %09, respectively) as well as any
      // non-US-ascii characters.
      value = value.replace(/%(2[0-4]|2[6-9a-f]|[3-6][0-9a-f]|7[0-9a-e])/g, decodeURI);
    } else {
      try {
        value = decodeURI(value)
                  // 1. decodeURI decodes %25 to %, which creates unintended
                  //    encoding sequences. Re-encode it, unless it's part of
                  //    a sequence that survived decodeURI, i.e. one for:
                  //    ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '#'
                  //    (RFC 3987 section 3.2)
                  // 2. Re-encode whitespace so that it doesn't get eaten away
                  //    by the location bar (bug 410726).
                  .replace(/%(?!3B|2F|3F|3A|40|26|3D|2B|24|2C|23)|[\r\n\t]/ig,
                           encodeURIComponent);
      } catch (e) {}
    }
  }

  // Encode invisible characters (C0/C1 control characters, U+007F [DEL],
  // U+00A0 [no-break space], line and paragraph separator,
  // object replacement character) (bug 452979, bug 909264)
  value = value.replace(/[\u0000-\u001f\u007f-\u00a0\u2028\u2029\ufffc]/g,
                        encodeURIComponent);

  // Encode default ignorable characters (bug 546013)
  // except ZWNJ (U+200C) and ZWJ (U+200D) (bug 582186).
  // This includes all bidirectional formatting characters.
  // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
  value = value.replace(/[\u00ad\u034f\u061c\u115f-\u1160\u17b4-\u17b5\u180b-\u180d\u200b\u200e-\u200f\u202a-\u202e\u2060-\u206f\u3164\ufe00-\ufe0f\ufeff\uffa0\ufff0-\ufff8]|\ud834[\udd73-\udd7a]|[\udb40-\udb43][\udc00-\udfff]/g,
                        encodeURIComponent);
  return value;
}

function UpdateUrlbarSearchSplitterState() {
  var splitter = document.getElementById("urlbar-search-splitter");
  var urlbar = document.getElementById("urlbar-container");
  var searchbar = document.getElementById("search-container");

  if (document.documentElement.getAttribute("customizing") == "true") {
    if (splitter) {
      splitter.remove();
    }
    return;
  }

  // If the splitter is already in the right place, we don't need to do anything:
  if (splitter &&
      ((splitter.nextSibling == searchbar && splitter.previousSibling == urlbar) ||
       (splitter.nextSibling == urlbar && splitter.previousSibling == searchbar))) {
    return;
  }

  var ibefore = null;
  if (urlbar && searchbar) {
    if (urlbar.nextSibling == searchbar)
      ibefore = searchbar;
    else if (searchbar.nextSibling == urlbar)
      ibefore = urlbar;
  }

  if (ibefore) {
    if (!splitter) {
      splitter = document.createElement("splitter");
      splitter.id = "urlbar-search-splitter";
      splitter.setAttribute("resizebefore", "flex");
      splitter.setAttribute("resizeafter", "flex");
      splitter.setAttribute("skipintoolbarset", "true");
      splitter.setAttribute("overflows", "false");
      splitter.className = "chromeclass-toolbar-additional";
    }
    urlbar.parentNode.insertBefore(splitter, ibefore);
  } else if (splitter)
    splitter.parentNode.removeChild(splitter);
}

function UpdatePageProxyState() {
  if (gURLBar && gURLBar.value != gLastValidURLStr)
    SetPageProxyState("invalid");
}

/**
 * Updates the user interface to indicate whether the URI in the location bar is
 * different than the loaded page, because it's being edited or because a search
 * result is currently selected and is displayed in the location bar.
 *
 * @param aState
 *        The string "valid" indicates that the security indicators and other
 *        related user interface elments should be shown because the URI in the
 *        location bar matches the loaded page. The string "invalid" indicates
 *        that the URI in the location bar is different than the loaded page.
 */
function SetPageProxyState(aState) {
  if (!gURLBar)
    return;

  let oldPageProxyState = gURLBar.getAttribute("pageproxystate");
  // The "browser_urlbar_stop_pending.js" test uses a MutationObserver to do
  // some verifications at this point, and it breaks if we don't write the
  // attribute, even if it hasn't changed (bug 1338115).
  gURLBar.setAttribute("pageproxystate", aState);

  // the page proxy state is set to valid via OnLocationChange, which
  // gets called when we switch tabs.
  if (aState == "valid") {
    gLastValidURLStr = gURLBar.value;
    gURLBar.addEventListener("input", UpdatePageProxyState);
  } else if (aState == "invalid") {
    gURLBar.removeEventListener("input", UpdatePageProxyState);
  }

  // After we've ensured that we've applied the listeners and updated the value
  // of gLastValidURLStr, return early if the actual state hasn't changed.
  if (oldPageProxyState == aState) {
    return;
  }

  UpdatePopupNotificationsVisibility();
}

function UpdatePopupNotificationsVisibility() {
  // Only need to do something if the PopupNotifications object for this window
  // has already been initialized (i.e. its getter no longer exists).
  if (Object.getOwnPropertyDescriptor(window, "PopupNotifications").get) {
    return;
  }

  // Notify PopupNotifications that the visible anchors may have changed. This
  // also checks the suppression state according to the "shouldSuppress"
  // function defined earlier in this file.
  PopupNotifications.anchorVisibilityChange();
}

function PageProxyClickHandler(aEvent) {
  if (aEvent.button == 1 && gPrefService.getBoolPref("middlemouse.paste"))
    middleMousePaste(aEvent);
}

var gMenuButtonBadgeManager = {
  BADGEID_APPUPDATE: "update",
  BADGEID_DOWNLOAD: "download",
  BADGEID_FXA: "fxa",
  BADGEID_ADDONS: "addons",

  fxaBadge: null,
  downloadBadge: null,
  appUpdateBadge: null,
  addonsBadge: null,

  init() {
    PanelUI.panel.addEventListener("popupshowing", this, true);
  },

  uninit() {
    PanelUI.panel.removeEventListener("popupshowing", this, true);
  },

  handleEvent(e) {
    if (e.type === "popupshowing") {
      this.clearBadges();
    }
  },

  _showBadge() {
    let badgeToShow = this.downloadBadge || this.appUpdateBadge || this.fxaBadge || this.addonsBadge;

    if (badgeToShow) {
      PanelUI.menuButton.setAttribute("badge-status", badgeToShow);
    } else {
      PanelUI.menuButton.removeAttribute("badge-status");
    }
  },

  _changeBadge(badgeId, badgeStatus = null) {
    if (badgeId == this.BADGEID_APPUPDATE) {
      this.appUpdateBadge = badgeStatus;
    } else if (badgeId == this.BADGEID_DOWNLOAD) {
      this.downloadBadge = badgeStatus;
    } else if (badgeId == this.BADGEID_FXA) {
      this.fxaBadge = badgeStatus;
    } else if (badgeId == this.BADGEID_ADDONS) {
      this.addonsBadge = badgeStatus;
    } else {
      Cu.reportError("The badge ID '" + badgeId + "' is unknown!");
    }
    this._showBadge();
  },

  addBadge(badgeId, badgeStatus) {
    if (!badgeStatus) {
      Cu.reportError("badgeStatus must be defined");
      return;
    }
    this._changeBadge(badgeId, badgeStatus);
  },

  removeBadge(badgeId) {
    this._changeBadge(badgeId);
  },

  clearBadges() {
    this.appUpdateBadge = null;
    this.downloadBadge = null;
    this.fxaBadge = null;
    this._showBadge();
  }
};

// Setup the hamburger button badges for updates, if enabled.
var gMenuButtonUpdateBadge = {
  enabled: false,
  badgeWaitTime: 0,
  timer: null,
  cancelObserverRegistered: false,

  init() {
    try {
      this.enabled = Services.prefs.getBoolPref("app.update.badge");
    } catch (e) {}
    if (this.enabled) {
      try {
        this.badgeWaitTime = Services.prefs.getIntPref("app.update.badgeWaitTime");
      } catch (e) {
        this.badgeWaitTime = 345600; // 4 days
      }
      Services.obs.addObserver(this, "update-staged", false);
      Services.obs.addObserver(this, "update-downloaded", false);
    }
  },

  uninit() {
    if (this.timer)
      this.timer.cancel();
    if (this.enabled) {
      Services.obs.removeObserver(this, "update-staged");
      Services.obs.removeObserver(this, "update-downloaded");
      this.enabled = false;
    }
    if (this.cancelObserverRegistered) {
      Services.obs.removeObserver(this, "update-canceled");
      this.cancelObserverRegistered = false;
    }
  },

  onMenuPanelCommand(event) {
    if (event.originalTarget.getAttribute("update-status") === "succeeded") {
      // restart the app
      let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
                       .createInstance(Ci.nsISupportsPRBool);
      Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");

      if (!cancelQuit.data) {
        Services.startup.quit(Services.startup.eAttemptQuit | Services.startup.eRestart);
      }
    } else {
      // open the page for manual update
      let url = Services.urlFormatter.formatURLPref("app.update.url.manual");
      openUILinkIn(url, "tab");
    }
  },

  observe(subject, topic, status) {
    if (topic == "update-canceled") {
      this.reset();
      return;
    }
    if (status == "failed") {
      // Background update has failed, let's show the UI responsible for
      // prompting the user to update manually.
      this.uninit();
      this.displayBadge(false);
      return;
    }

    // Give the user badgeWaitTime seconds to react before prompting.
    this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
    this.timer.initWithCallback(this, this.badgeWaitTime * 1000,
                                this.timer.TYPE_ONE_SHOT);
    // The timer callback will call uninit() when it completes.
  },

  notify() {
    // If the update is successfully applied, or if the updater has fallen back
    // to non-staged updates, add a badge to the hamburger menu to indicate an
    // update will be applied once the browser restarts.
    this.uninit();
    this.displayBadge(true);
  },

  displayBadge(succeeded) {
    let status = succeeded ? "succeeded" : "failed";
    let badgeStatus = "update-" + status;
    gMenuButtonBadgeManager.addBadge(gMenuButtonBadgeManager.BADGEID_APPUPDATE, badgeStatus);

    let stringId;
    let updateButtonText;
    if (succeeded) {
      let brandBundle = document.getElementById("bundle_brand");
      let brandShortName = brandBundle.getString("brandShortName");
      stringId = "appmenu.restartNeeded.description";
      updateButtonText = gNavigatorBundle.getFormattedString(stringId,
                                                             [brandShortName]);
      Services.obs.addObserver(this, "update-canceled", false);
      this.cancelObserverRegistered = true;
    } else {
      stringId = "appmenu.updateFailed.description";
      updateButtonText = gNavigatorBundle.getString(stringId);
    }

    let updateButton = document.getElementById("PanelUI-update-status");
    updateButton.setAttribute("label", updateButtonText);
    updateButton.setAttribute("update-status", status);
    updateButton.hidden = false;
  },

  reset() {
    gMenuButtonBadgeManager.removeBadge(
      gMenuButtonBadgeManager.BADGEID_APPUPDATE);
    let updateButton = document.getElementById("PanelUI-update-status");
    updateButton.hidden = true;
    this.uninit();
    this.init();
  }
};

// Values for telemtery bins: see TLS_ERROR_REPORT_UI in Histograms.json
const TLS_ERROR_REPORT_TELEMETRY_AUTO_CHECKED   = 2;
const TLS_ERROR_REPORT_TELEMETRY_AUTO_UNCHECKED = 3;
const TLS_ERROR_REPORT_TELEMETRY_MANUAL_SEND    = 4;
const TLS_ERROR_REPORT_TELEMETRY_AUTO_SEND      = 5;

const PREF_SSL_IMPACT_ROOTS = ["security.tls.version.", "security.ssl3."];

const PREF_SSL_IMPACT = PREF_SSL_IMPACT_ROOTS.reduce((prefs, root) => {
  return prefs.concat(Services.prefs.getChildList(root));
}, []);

/**
 * Handle command events bubbling up from error page content
 * or from about:newtab or from remote error pages that invoke
 * us via async messaging.
 */
var BrowserOnClick = {
  init() {
    let mm = window.messageManager;
    mm.addMessageListener("Browser:CertExceptionError", this);
    mm.addMessageListener("Browser:OpenCaptivePortalPage", this);
    mm.addMessageListener("Browser:SiteBlockedError", this);
    mm.addMessageListener("Browser:EnableOnlineMode", this);
    mm.addMessageListener("Browser:SendSSLErrorReport", this);
    mm.addMessageListener("Browser:SetSSLErrorReportAuto", this);
    mm.addMessageListener("Browser:ResetSSLPreferences", this);
    mm.addMessageListener("Browser:SSLErrorReportTelemetry", this);
    mm.addMessageListener("Browser:OverrideWeakCrypto", this);
    mm.addMessageListener("Browser:SSLErrorGoBack", this);

    Services.obs.addObserver(this, "captive-portal-login-abort", false);
    Services.obs.addObserver(this, "captive-portal-login-success", false);
  },

  uninit() {
    let mm = window.messageManager;
    mm.removeMessageListener("Browser:CertExceptionError", this);
    mm.removeMessageListener("Browser:SiteBlockedError", this);
    mm.removeMessageListener("Browser:EnableOnlineMode", this);
    mm.removeMessageListener("Browser:SendSSLErrorReport", this);
    mm.removeMessageListener("Browser:SetSSLErrorReportAuto", this);
    mm.removeMessageListener("Browser:ResetSSLPreferences", this);
    mm.removeMessageListener("Browser:SSLErrorReportTelemetry", this);
    mm.removeMessageListener("Browser:OverrideWeakCrypto", this);
    mm.removeMessageListener("Browser:SSLErrorGoBack", this);

    Services.obs.removeObserver(this, "captive-portal-login-abort");
    Services.obs.removeObserver(this, "captive-portal-login-success");
  },

  observe(aSubject, aTopic, aData) {
    switch (aTopic) {
      case "captive-portal-login-abort":
      case "captive-portal-login-success":
        // Broadcast when a captive portal is freed so that error pages
        // can refresh themselves.
        window.messageManager.broadcastAsyncMessage("Browser:CaptivePortalFreed");
      break;
    }
  },

  receiveMessage(msg) {
    switch (msg.name) {
      case "Browser:CertExceptionError":
        this.onCertError(msg.target, msg.data.elementId,
                         msg.data.isTopFrame, msg.data.location,
                         msg.data.securityInfoAsString);
      break;
      case "Browser:OpenCaptivePortalPage":
        CaptivePortalWatcher.ensureCaptivePortalTab();
      break;
      case "Browser:SiteBlockedError":
        this.onAboutBlocked(msg.data.elementId, msg.data.reason,
                            msg.data.isTopFrame, msg.data.location);
      break;
      case "Browser:EnableOnlineMode":
        if (Services.io.offline) {
          // Reset network state and refresh the page.
          Services.io.offline = false;
          msg.target.reload();
        }
      break;
      case "Browser:SendSSLErrorReport":
        this.onSSLErrorReport(msg.target,
                              msg.data.uri,
                              msg.data.securityInfo);
      break;
      case "Browser:ResetSSLPreferences":
        for (let prefName of PREF_SSL_IMPACT) {
          Services.prefs.clearUserPref(prefName);
        }
        msg.target.reload();
      break;
      case "Browser:SetSSLErrorReportAuto":
        Services.prefs.setBoolPref("security.ssl.errorReporting.automatic", msg.json.automatic);
        let bin = TLS_ERROR_REPORT_TELEMETRY_AUTO_UNCHECKED;
        if (msg.json.automatic) {
          bin = TLS_ERROR_REPORT_TELEMETRY_AUTO_CHECKED;
        }
        Services.telemetry.getHistogramById("TLS_ERROR_REPORT_UI").add(bin);
      break;
      case "Browser:SSLErrorReportTelemetry":
        let reportStatus = msg.data.reportStatus;
        Services.telemetry.getHistogramById("TLS_ERROR_REPORT_UI")
          .add(reportStatus);
      break;
      case "Browser:OverrideWeakCrypto":
        let weakCryptoOverride = Cc["@mozilla.org/security/weakcryptooverride;1"]
                                   .getService(Ci.nsIWeakCryptoOverride);
        weakCryptoOverride.addWeakCryptoOverride(
          msg.data.uri.host,
          PrivateBrowsingUtils.isBrowserPrivate(gBrowser.selectedBrowser));
      break;
      case "Browser:SSLErrorGoBack":
        goBackFromErrorPage();
      break;
    }
  },

  onSSLErrorReport(browser, uri, securityInfo) {
    if (!Services.prefs.getBoolPref("security.ssl.errorReporting.enabled")) {
      Cu.reportError("User requested certificate error report sending, but certificate error reporting is disabled");
      return;
    }

    let serhelper = Cc["@mozilla.org/network/serialization-helper;1"]
                           .getService(Ci.nsISerializationHelper);
    let transportSecurityInfo = serhelper.deserializeObject(securityInfo);
    transportSecurityInfo.QueryInterface(Ci.nsITransportSecurityInfo)

    let errorReporter = Cc["@mozilla.org/securityreporter;1"]
                          .getService(Ci.nsISecurityReporter);
    errorReporter.reportTLSError(transportSecurityInfo,
                                 uri.host, uri.port);
  },

  onCertError(browser, elementId, isTopFrame, location, securityInfoAsString) {
    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
    let securityInfo;

    switch (elementId) {
      case "exceptionDialogButton":
        if (isTopFrame) {
          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_CLICK_ADD_EXCEPTION);
        }

        securityInfo = getSecurityInfo(securityInfoAsString);
        let sslStatus = securityInfo.QueryInterface(Ci.nsISSLStatusProvider)
                                    .SSLStatus;
        let params = { exceptionAdded : false,
                       sslStatus };

        try {
          switch (Services.prefs.getIntPref("browser.ssl_override_behavior")) {
            case 2 : // Pre-fetch & pre-populate
              params.prefetchCert = true;
            case 1 : // Pre-populate
              params.location = location;
          }
        } catch (e) {
          Components.utils.reportError("Couldn't get ssl_override pref: " + e);
        }

        window.openDialog("chrome://pippki/content/exceptionDialog.xul",
                          "", "chrome,centerscreen,modal", params);

        // If the user added the exception cert, attempt to reload the page
        if (params.exceptionAdded) {
          browser.reload();
        }
        break;

      case "returnButton":
        if (isTopFrame) {
          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_GET_ME_OUT_OF_HERE);
        }
        goBackFromErrorPage();
        break;

      case "advancedButton":
        if (isTopFrame) {
          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_UNDERSTAND_RISKS);
        }

        securityInfo = getSecurityInfo(securityInfoAsString);
        let errorInfo = getDetailedCertErrorInfo(location,
                                                 securityInfo);
        browser.messageManager.sendAsyncMessage( "CertErrorDetails", {
            code: securityInfo.errorCode,
            info: errorInfo
        });
        break;

      case "copyToClipboard":
        const gClipboardHelper = Cc["@mozilla.org/widget/clipboardhelper;1"]
                                    .getService(Ci.nsIClipboardHelper);
        securityInfo = getSecurityInfo(securityInfoAsString);
        let detailedInfo = getDetailedCertErrorInfo(location,
                                                    securityInfo);
        gClipboardHelper.copyString(detailedInfo);
        break;

    }
  },

  onAboutBlocked(elementId, reason, isTopFrame, location) {
    // Depending on what page we are displaying here (malware/phishing/unwanted)
    // use the right strings and links for each.
    let bucketName = "";
    let sendTelemetry = false;
    if (reason === "malware") {
      sendTelemetry = true;
      bucketName = "WARNING_MALWARE_PAGE_";
    } else if (reason === "phishing") {
      sendTelemetry = true;
      bucketName = "WARNING_PHISHING_PAGE_";
    } else if (reason === "unwanted") {
      sendTelemetry = true;
      bucketName = "WARNING_UNWANTED_PAGE_";
    }
    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
    let nsISecTel = Ci.nsISecurityUITelemetry;
    bucketName += isTopFrame ? "TOP_" : "FRAME_";
    switch (elementId) {
      case "getMeOutButton":
        if (sendTelemetry) {
          secHistogram.add(nsISecTel[bucketName + "GET_ME_OUT_OF_HERE"]);
        }
        getMeOutOfHere();
        break;

      case "reportButton":
        // This is the "Why is this site blocked" button. We redirect
        // to the generic page describing phishing/malware protection.

        // We log even if malware/phishing/unwanted info URL couldn't be found:
        // the measurement is for how many users clicked the WHY BLOCKED button
        if (sendTelemetry) {
          secHistogram.add(nsISecTel[bucketName + "WHY_BLOCKED"]);
        }
        openHelpLink("phishing-malware", false, "current");
        break;

      case "ignoreWarningButton":
        if (gPrefService.getBoolPref("browser.safebrowsing.allowOverride")) {
          if (sendTelemetry) {
            secHistogram.add(nsISecTel[bucketName + "IGNORE_WARNING"]);
          }
          this.ignoreWarningButton(reason);
        }
        break;
    }
  },

  ignoreWarningButton(reason) {
    // Allow users to override and continue through to the site,
    // but add a notify bar as a reminder, so that they don't lose
    // track after, e.g., tab switching.
    gBrowser.loadURIWithFlags(gBrowser.currentURI.spec,
                              nsIWebNavigation.LOAD_FLAGS_BYPASS_CLASSIFIER,
                              null, null, null);

    Services.perms.add(gBrowser.currentURI, "safe-browsing",
                       Ci.nsIPermissionManager.ALLOW_ACTION,
                       Ci.nsIPermissionManager.EXPIRE_SESSION);

    let buttons = [{
      label: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.label"),
      accessKey: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.accessKey"),
      callback() { getMeOutOfHere(); }
    }];

    let title;
    if (reason === "malware") {
      title = gNavigatorBundle.getString("safebrowsing.reportedAttackSite");
      buttons[1] = {
        label: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.label"),
        accessKey: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.accessKey"),
        callback() {
          openUILinkIn(gSafeBrowsing.getReportURL("MalwareMistake"), "tab");
        }
      };
    } else if (reason === "phishing") {
      title = gNavigatorBundle.getString("safebrowsing.deceptiveSite");
      buttons[1] = {
        label: gNavigatorBundle.getString("safebrowsing.notADeceptiveSiteButton.label"),
        accessKey: gNavigatorBundle.getString("safebrowsing.notADeceptiveSiteButton.accessKey"),
        callback() {
          openUILinkIn(gSafeBrowsing.getReportURL("PhishMistake"), "tab");
        }
      };
    } else if (reason === "unwanted") {
      title = gNavigatorBundle.getString("safebrowsing.reportedUnwantedSite");
      // There is no button for reporting errors since Google doesn't currently
      // provide a URL endpoint for these reports.
    }

    let notificationBox = gBrowser.getNotificationBox();
    let value = "blocked-badware-page";

    let previousNotification = notificationBox.getNotificationWithValue(value);
    if (previousNotification) {
      notificationBox.removeNotification(previousNotification);
    }

    let notification = notificationBox.appendNotification(
      title,
      value,
      "chrome://global/skin/icons/blacklist_favicon.png",
      notificationBox.PRIORITY_CRITICAL_HIGH,
      buttons
    );
    // Persist the notification until the user removes so it
    // doesn't get removed on redirects.
    notification.persistence = -1;
  },
};

/**
 * Re-direct the browser to a known-safe page.  This function is
 * used when, for example, the user browses to a known malware page
 * and is presented with about:blocked.  The "Get me out of here!"
 * button should take the user to the default start page so that even
 * when their own homepage is infected, we can get them somewhere safe.
 */
function getMeOutOfHere() {
  gBrowser.loadURI(getDefaultHomePage());
}

/**
 * Re-direct the browser to the previous page or a known-safe page if no
 * previous page is found in history.  This function is used when the user
 * browses to a secure page with certificate issues and is presented with
 * about:certerror.  The "Go Back" button should take the user to the previous
 * or a default start page so that even when their own homepage is on a server
 * that has certificate errors, we can get them somewhere safe.
 */
function goBackFromErrorPage() {
  const ss = Cc["@mozilla.org/browser/sessionstore;1"].
             getService(Ci.nsISessionStore);
  let state = JSON.parse(ss.getTabState(gBrowser.selectedTab));
  if (state.index == 1) {
    // If the unsafe page is the first or the only one in history, go to the
    // start page.
    gBrowser.loadURI(getDefaultHomePage());
  } else {
    BrowserBack();
  }
}

/**
 * Return the default start page for the cases when the user's own homepage is
 * infected, so we can get them somewhere safe.
 */
function getDefaultHomePage() {
  // Get the start page from the *default* pref branch, not the user's
  var prefs = Services.prefs.getDefaultBranch(null);
  var url = BROWSER_NEW_TAB_URL;
  try {
    url = prefs.getComplexValue("browser.startup.homepage",
                                Ci.nsIPrefLocalizedString).data;
    // If url is a pipe-delimited set of pages, just take the first one.
    if (url.includes("|"))
      url = url.split("|")[0];
  } catch (e) {
    Components.utils.reportError("Couldn't get homepage pref: " + e);
  }
  return url;
}

function BrowserFullScreen() {
  window.fullScreen = !window.fullScreen;
}

function mirrorShow(popup) {
  let services = [];
  if (Services.prefs.getBoolPref("browser.casting.enabled")) {
    services = CastingApps.getServicesForMirroring();
  }
  popup.ownerDocument.getElementById("menu_mirrorTabCmd").hidden = !services.length;
}

function mirrorMenuItemClicked(event) {
  gBrowser.selectedBrowser.messageManager.sendAsyncMessage("SecondScreen:tab-mirror",
                                                           {service: event.originalTarget._service});
}

function populateMirrorTabMenu(popup) {
  popup.innerHTML = null;
  if (!Services.prefs.getBoolPref("browser.casting.enabled")) {
    return;
  }
  let doc = popup.ownerDocument;
  let services = CastingApps.getServicesForMirroring();
  services.forEach(service => {
    let item = doc.createElement("menuitem");
    item.setAttribute("label", service.friendlyName);
    item._service = service;
    item.addEventListener("command", mirrorMenuItemClicked);
    popup.appendChild(item);
  });
}

function getWebNavigation() {
  return gBrowser.webNavigation;
}

function BrowserReloadWithFlags(reloadFlags) {
  let url = gBrowser.currentURI.spec;
  if (gBrowser.updateBrowserRemotenessByURL(gBrowser.selectedBrowser, url)) {
    // If the remoteness has changed, the new browser doesn't have any
    // information of what was loaded before, so we need to load the previous
    // URL again.
    gBrowser.loadURIWithFlags(url, reloadFlags);
    return;
  }

  // Reset temporary permissions on the current tab. This is done here
  // because we only want to reset permissions on user reload.
  SitePermissions.clearTemporaryPermissions(gBrowser.selectedBrowser);

  let windowUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
                          .getInterface(Ci.nsIDOMWindowUtils);

  gBrowser.selectedBrowser
          .messageManager
          .sendAsyncMessage("Browser:Reload",
                            { flags: reloadFlags,
                              handlingUserInput: windowUtils.isHandlingUserInput });
}

function getSecurityInfo(securityInfoAsString) {
  if (!securityInfoAsString)
    return null;

  const serhelper = Cc["@mozilla.org/network/serialization-helper;1"]
                       .getService(Ci.nsISerializationHelper);
  let securityInfo = serhelper.deserializeObject(securityInfoAsString);
  securityInfo.QueryInterface(Ci.nsITransportSecurityInfo);

  return securityInfo;
}

/**
 * Returns a string with detailed information about the certificate validation
 * failure from the specified URI that can be used to send a report.
 */
function getDetailedCertErrorInfo(location, securityInfo) {
  if (!securityInfo)
    return "";

  let certErrorDetails = location;
  let code = securityInfo.errorCode;
  let errors = Cc["@mozilla.org/nss_errors_service;1"]
                  .getService(Ci.nsINSSErrorsService);

  certErrorDetails += "\r\n\r\n" + errors.getErrorMessage(errors.getXPCOMFromNSSError(code));

  const sss = Cc["@mozilla.org/ssservice;1"]
                 .getService(Ci.nsISiteSecurityService);
  // SiteSecurityService uses different storage if the channel is
  // private. Thus we must give isSecureHost correct flags or we
  // might get incorrect results.
  let flags = PrivateBrowsingUtils.isWindowPrivate(window) ?
              Ci.nsISocketProvider.NO_PERMANENT_STORAGE : 0;

  let uri = Services.io.newURI(location);

  let hasHSTS = sss.isSecureHost(sss.HEADER_HSTS, uri.host, flags);
  let hasHPKP = sss.isSecureHost(sss.HEADER_HPKP, uri.host, flags);
  certErrorDetails += "\r\n\r\n" +
                      gNavigatorBundle.getFormattedString("certErrorDetailsHSTS.label",
                                                          [hasHSTS]);
  certErrorDetails += "\r\n" +
                      gNavigatorBundle.getFormattedString("certErrorDetailsKeyPinning.label",
                                                          [hasHPKP]);

  let certChain = "";
  if (securityInfo.failedCertChain) {
    let certs = securityInfo.failedCertChain.getEnumerator();
    while (certs.hasMoreElements()) {
      let cert = certs.getNext();
      cert.QueryInterface(Ci.nsIX509Cert);
      certChain += getPEMString(cert);
    }
  }

  certErrorDetails += "\r\n\r\n" +
                      gNavigatorBundle.getString("certErrorDetailsCertChain.label") +
                      "\r\n\r\n" + certChain;

  return certErrorDetails;
}

// TODO: can we pull getDERString and getPEMString in from pippki.js instead of
// duplicating them here?
function getDERString(cert) {
  var length = {};
  var derArray = cert.getRawDER(length);
  var derString = "";
  for (var i = 0; i < derArray.length; i++) {
    derString += String.fromCharCode(derArray[i]);
  }
  return derString;
}

function getPEMString(cert) {
  var derb64 = btoa(getDERString(cert));
  // Wrap the Base64 string into lines of 64 characters,
  // with CRLF line breaks (as specified in RFC 1421).
  var wrapped = derb64.replace(/(\S{64}(?!$))/g, "$1\r\n");
  return "-----BEGIN CERTIFICATE-----\r\n"
         + wrapped
         + "\r\n-----END CERTIFICATE-----\r\n";
}

var PrintPreviewListener = {
  _printPreviewTab: null,
  _tabBeforePrintPreview: null,
  _simplifyPageTab: null,

  getPrintPreviewBrowser() {
    if (!this._printPreviewTab) {
      let browser = gBrowser.selectedBrowser;
      let preferredRemoteType = browser.remoteType;
      this._tabBeforePrintPreview = gBrowser.selectedTab;
      this._printPreviewTab = gBrowser.loadOneTab("about:printpreview",
                                                  { inBackground: false,
                                                    preferredRemoteType,
                                                    relatedBrowser: browser });
      gBrowser.selectedTab = this._printPreviewTab;
    }
    return gBrowser.getBrowserForTab(this._printPreviewTab);
  },
  createSimplifiedBrowser() {
    this._simplifyPageTab = gBrowser.loadOneTab("about:printpreview",
                                                { inBackground: true });
    return this.getSimplifiedSourceBrowser();
  },
  getSourceBrowser() {
    return this._tabBeforePrintPreview ?
      this._tabBeforePrintPreview.linkedBrowser : gBrowser.selectedBrowser;
  },
  getSimplifiedSourceBrowser() {
    return this._simplifyPageTab ?
      gBrowser.getBrowserForTab(this._simplifyPageTab) : null;
  },
  getNavToolbox() {
    return gNavToolbox;
  },
  onEnter() {
    // We might have accidentally switched tabs since the user invoked print
    // preview
    if (gBrowser.selectedTab != this._printPreviewTab) {
      gBrowser.selectedTab = this._printPreviewTab;
    }
    gInPrintPreviewMode = true;
    this._toggleAffectedChrome();
  },
  onExit() {
    gBrowser.selectedTab = this._tabBeforePrintPreview;
    this._tabBeforePrintPreview = null;
    gInPrintPreviewMode = false;
    this._toggleAffectedChrome();
    if (this._simplifyPageTab) {
      gBrowser.removeTab(this._simplifyPageTab);
      this._simplifyPageTab = null;
    }
    gBrowser.removeTab(this._printPreviewTab);
    gBrowser.deactivatePrintPreviewBrowsers();
    this._printPreviewTab = null;
  },
  _toggleAffectedChrome() {
    gNavToolbox.collapsed = gInPrintPreviewMode;

    if (gInPrintPreviewMode)
      this._hideChrome();
    else
      this._showChrome();

    TabsInTitlebar.allowedBy("print-preview", !gInPrintPreviewMode);
  },
  _hideChrome() {
    this._chromeState = {};

    this._chromeState.sidebarOpen = SidebarUI.isOpen;
    this._sidebarCommand = SidebarUI.currentID;
    SidebarUI.hide();

    var notificationBox = gBrowser.getNotificationBox();
    this._chromeState.notificationsOpen = !notificationBox.notificationsHidden;
    notificationBox.notificationsHidden = true;

    this._chromeState.findOpen = gFindBarInitialized && !gFindBar.hidden;
    if (gFindBarInitialized)
      gFindBar.close();

    var globalNotificationBox = document.getElementById("global-notificationbox");
    this._chromeState.globalNotificationsOpen = !globalNotificationBox.notificationsHidden;
    globalNotificationBox.notificationsHidden = true;

    this._chromeState.syncNotificationsOpen = false;
    var syncNotifications = document.getElementById("sync-notifications");
    if (syncNotifications) {
      this._chromeState.syncNotificationsOpen = !syncNotifications.notificationsHidden;
      syncNotifications.notificationsHidden = true;
    }
  },
  _showChrome() {
    if (this._chromeState.notificationsOpen)
      gBrowser.getNotificationBox().notificationsHidden = false;

    if (this._chromeState.findOpen)
      gFindBar.open();

    if (this._chromeState.globalNotificationsOpen)
      document.getElementById("global-notificationbox").notificationsHidden = false;

    if (this._chromeState.syncNotificationsOpen)
      document.getElementById("sync-notifications").notificationsHidden = false;

    if (this._chromeState.sidebarOpen)
      SidebarUI.show(this._sidebarCommand);
  },

  activateBrowser(browser) {
    gBrowser.activateBrowserForPrintPreview(browser);
  },
}

function getMarkupDocumentViewer() {
  return gBrowser.markupDocumentViewer;
}

// This function is obsolete. Newer code should use <tooltip page="true"/> instead.
function FillInHTMLTooltip(tipElement) {
  document.getElementById("aHTMLTooltip").fillInPageTooltip(tipElement);
}

var browserDragAndDrop = {
  canDropLink: aEvent => Services.droppedLinkHandler.canDropLink(aEvent, true),

  dragOver(aEvent) {
    if (this.canDropLink(aEvent)) {
      aEvent.preventDefault();
    }
  },

  dropLinks(aEvent, aDisallowInherit) {
    return Services.droppedLinkHandler.dropLinks(aEvent, aDisallowInherit);
  }
};

var homeButtonObserver = {
  onDrop(aEvent) {
      // disallow setting home pages that inherit the principal
      let links = browserDragAndDrop.dropLinks(aEvent, true);
      if (links.length) {
        setTimeout(openHomeDialog, 0, links.map(link => link.url).join("|"));
      }
    },

  onDragOver(aEvent) {
      if (gPrefService.prefIsLocked("browser.startup.homepage")) {
        return;
      }
      browserDragAndDrop.dragOver(aEvent);
      aEvent.dropEffect = "link";
    },
  onDragExit(aEvent) {
    }
}

function openHomeDialog(aURL) {
  var promptTitle = gNavigatorBundle.getString("droponhometitle");
  var promptMsg;
  if (aURL.includes("|")) {
    promptMsg = gNavigatorBundle.getString("droponhomemsgMultiple");
  } else {
    promptMsg = gNavigatorBundle.getString("droponhomemsg");
  }

  var pressedVal  = Services.prompt.confirmEx(window, promptTitle, promptMsg,
                          Services.prompt.STD_YES_NO_BUTTONS,
                          null, null, null, null, {value:0});

  if (pressedVal == 0) {
    try {
      var homepageStr = Components.classes["@mozilla.org/supports-string;1"]
                        .createInstance(Components.interfaces.nsISupportsString);
      homepageStr.data = aURL;
      gPrefService.setComplexValue("browser.startup.homepage",
                                   Components.interfaces.nsISupportsString, homepageStr);
    } catch (ex) {
      dump("Failed to set the home page.\n" + ex + "\n");
    }
  }
}

var newTabButtonObserver = {
  onDragOver(aEvent) {
    browserDragAndDrop.dragOver(aEvent);
  },
  onDragExit(aEvent) {},
  onDrop: Task.async(function* (aEvent) {
    let links = browserDragAndDrop.dropLinks(aEvent);
    for (let link of links) {
      if (link.url) {
        let data = yield getShortcutOrURIAndPostData(link.url);
        // Allow third-party services to fixup this URL.
        openNewTabWith(data.url, null, data.postData, aEvent, true);
      }
    }
  })
}

var newWindowButtonObserver = {
  onDragOver(aEvent) {
    browserDragAndDrop.dragOver(aEvent);
  },
  onDragExit(aEvent) {},
  onDrop: Task.async(function* (aEvent) {
    let links = browserDragAndDrop.dropLinks(aEvent);
    for (let link of links) {
      if (link.url) {
        let data = yield getShortcutOrURIAndPostData(link.url);
        // Allow third-party services to fixup this URL.
        openNewWindowWith(data.url, null, data.postData, true);
      }
    }
  })
}

const DOMLinkHandler = {
  init() {
    let mm = window.messageManager;
    mm.addMessageListener("Link:AddFeed", this);
    mm.addMessageListener("Link:SetIcon", this);
    mm.addMessageListener("Link:AddSearch", this);
  },

  receiveMessage(aMsg) {
    switch (aMsg.name) {
      case "Link:AddFeed":
        let link = {type: aMsg.data.type, href: aMsg.data.href, title: aMsg.data.title};
        FeedHandler.addFeed(link, aMsg.target);
        break;

      case "Link:SetIcon":
        this.setIcon(aMsg.target, aMsg.data.url, aMsg.data.loadingPrincipal);
        break;

      case "Link:AddSearch":
        this.addSearch(aMsg.target, aMsg.data.engine, aMsg.data.url);
        break;
    }
  },

  setIcon(aBrowser, aURL, aLoadingPrincipal) {
    if (gBrowser.isFailedIcon(aURL))
      return false;

    let tab = gBrowser.getTabForBrowser(aBrowser);
    if (!tab)
      return false;

    gBrowser.setIcon(tab, aURL, aLoadingPrincipal);
    return true;
  },

  addSearch(aBrowser, aEngine, aURL) {
    let tab = gBrowser.getTabForBrowser(aBrowser);
    if (!tab)
      return;

    BrowserSearch.addEngine(aBrowser, aEngine, makeURI(aURL));
  },
}

const BrowserSearch = {
  addEngine(browser, engine, uri) {
    // Check to see whether we've already added an engine with this title
    if (browser.engines) {
      if (browser.engines.some(e => e.title == engine.title))
        return;
    }

    var hidden = false;
    // If this engine (identified by title) is already in the list, add it
    // to the list of hidden engines rather than to the main list.
    // XXX This will need to be changed when engines are identified by URL;
    // see bug 335102.
    if (Services.search.getEngineByName(engine.title))
      hidden = true;

    var engines = (hidden ? browser.hiddenEngines : browser.engines) || [];

    engines.push({ uri: engine.href,
                   title: engine.title,
                   get icon() { return browser.mIconURL; }
                 });

    if (hidden)
      browser.hiddenEngines = engines;
    else {
      browser.engines = engines;
      if (browser == gBrowser.selectedBrowser)
        this.updateOpenSearchBadge();
    }
  },

  /**
   * Update the browser UI to show whether or not additional engines are
   * available when a page is loaded or the user switches tabs to a page that
   * has search engines.
   */
  updateOpenSearchBadge() {
    var searchBar = this.searchBar;
    if (!searchBar)
      return;

    var engines = gBrowser.selectedBrowser.engines;
    if (engines && engines.length > 0)
      searchBar.setAttribute("addengines", "true");
    else
      searchBar.removeAttribute("addengines");
  },

  /**
   * Gives focus to the search bar, if it is present on the toolbar, or loads
   * the default engine's search form otherwise. For Mac, opens a new window
   * or focuses an existing window, if necessary.
   */
  webSearch: function BrowserSearch_webSearch() {
    if (window.location.href != getBrowserURL()) {
      var win = getTopWin();
      if (win) {
        // If there's an open browser window, it should handle this command
        win.focus();
        win.BrowserSearch.webSearch();
      } else {
        // If there are no open browser windows, open a new one
        var observer = function(subject, topic, data) {
          if (subject == win) {
            BrowserSearch.webSearch();
            Services.obs.removeObserver(observer, "browser-delayed-startup-finished");
          }
        }
        win = window.openDialog(getBrowserURL(), "_blank",
                                "chrome,all,dialog=no", "about:blank");
        Services.obs.addObserver(observer, "browser-delayed-startup-finished", false);
      }
      return;
    }

    let focusUrlBarIfSearchFieldIsNotActive = function(aSearchBar) {
      if (!aSearchBar || document.activeElement != aSearchBar.textbox.inputField) {
        focusAndSelectUrlBar();
      }
    };

    let searchBar = this.searchBar;
    let placement = CustomizableUI.getPlacementOfWidget("search-container");
    let focusSearchBar = () => {
      searchBar = this.searchBar;
      searchBar.select();
      focusUrlBarIfSearchFieldIsNotActive(searchBar);
    };
    if (placement && placement.area == CustomizableUI.AREA_PANEL) {
      // The panel is not constructed until the first time it is shown.
      PanelUI.show().then(focusSearchBar);
      return;
    }
    if (placement && placement.area == CustomizableUI.AREA_NAVBAR && searchBar &&
        searchBar.parentNode.getAttribute("overflowedItem") == "true") {
      let navBar = document.getElementById(CustomizableUI.AREA_NAVBAR);
      navBar.overflowable.show().then(() => {
        focusSearchBar();
      });
      return;
    }
    if (searchBar) {
      if (window.fullScreen)
        FullScreen.showNavToolbox();
      searchBar.select();
    }
    focusUrlBarIfSearchFieldIsNotActive(searchBar);
  },

  /**
   * Loads a search results page, given a set of search terms. Uses the current
   * engine if the search bar is visible, or the default engine otherwise.
   *
   * @param searchText
   *        The search terms to use for the search.
   *
   * @param useNewTab
   *        Boolean indicating whether or not the search should load in a new
   *        tab.
   *
   * @param purpose [optional]
   *        A string meant to indicate the context of the search request. This
   *        allows the search service to provide a different nsISearchSubmission
   *        depending on e.g. where the search is triggered in the UI.
   *
   * @return engine The search engine used to perform a search, or null if no
   *                search was performed.
   */
  _loadSearch(searchText, useNewTab, purpose) {
    let engine;

    // If the search bar is visible, use the current engine, otherwise, fall
    // back to the default engine.
    if (isElementVisible(this.searchBar))
      engine = Services.search.currentEngine;
    else
      engine = Services.search.defaultEngine;

    let submission = engine.getSubmission(searchText, null, purpose); // HTML response

    // getSubmission can return null if the engine doesn't have a URL
    // with a text/html response type.  This is unlikely (since
    // SearchService._addEngineToStore() should fail for such an engine),
    // but let's be on the safe side.
    if (!submission) {
      return null;
    }

    let inBackground = Services.prefs.getBoolPref("browser.search.context.loadInBackground");
    openLinkIn(submission.uri.spec,
               useNewTab ? "tab" : "current",
               { postData: submission.postData,
                 inBackground,
                 relatedToCurrent: true });

    return engine;
  },

  /**
   * Just like _loadSearch, but preserving an old API.
   *
   * @return string Name of the search engine used to perform a search or null
   *         if a search was not performed.
   */
  loadSearch: function BrowserSearch_search(searchText, useNewTab, purpose) {
    let engine = BrowserSearch._loadSearch(searchText, useNewTab, purpose);
    if (!engine) {
      return null;
    }
    return engine.name;
  },

  /**
   * Perform a search initiated from the context menu.
   *
   * This should only be called from the context menu. See
   * BrowserSearch.loadSearch for the preferred API.
   */
  loadSearchFromContext(terms) {
    let engine = BrowserSearch._loadSearch(terms, true, "contextmenu");
    if (engine) {
      BrowserSearch.recordSearchInTelemetry(engine, "contextmenu");
    }
  },

  pasteAndSearch(event) {
    BrowserSearch.searchBar.select();
    goDoCommand("cmd_paste");
    BrowserSearch.searchBar.handleSearchCommand(event);
  },

  /**
   * Returns the search bar element if it is present in the toolbar, null otherwise.
   */
  get searchBar() {
    return document.getElementById("searchbar");
  },

  get searchEnginesURL() {
    return formatURL("browser.search.searchEnginesURL", true);
  },

  loadAddEngines: function BrowserSearch_loadAddEngines() {
    var newWindowPref = gPrefService.getIntPref("browser.link.open_newwindow");
    var where = newWindowPref == 3 ? "tab" : "window";
    openUILinkIn(this.searchEnginesURL, where);
  },

  _getSearchEngineId(engine) {
    if (engine && engine.identifier) {
      return engine.identifier;
    }

    if (!engine || (engine.name === undefined) ||
        !Services.prefs.getBoolPref("toolkit.telemetry.enabled"))
      return "other";

    return "other-" + engine.name;
  },

  /**
   * Helper to record a search with Telemetry.
   *
   * Telemetry records only search counts and nothing pertaining to the search itself.
   *
   * @param engine
   *        (nsISearchEngine) The engine handling the search.
   * @param source
   *        (string) Where the search originated from. See BrowserUsageTelemetry for
   *        allowed values.
   * @param details [optional]
   *        An optional parameter passed to |BrowserUsageTelemetry.recordSearch|.
   *        See its documentation for allowed options.
   *        Additionally, if the search was a suggested search, |details.selection|
   *        indicates where the item was in the suggestion list and how the user
   *        selected it: {selection: {index: The selected index, kind: "key" or "mouse"}}
   */
  recordSearchInTelemetry(engine, source, details = {}) {
    BrowserUITelemetry.countSearchEvent(source, null, details.selection);
    try {
      BrowserUsageTelemetry.recordSearch(engine, source, details);
    } catch (ex) {
      Cu.reportError(ex);
    }
  },

  /**
   * Helper to record a one-off search with Telemetry.
   *
   * Telemetry records only search counts and nothing pertaining to the search itself.
   *
   * @param engine
   *        (nsISearchEngine) The engine handling the search.
   * @param source
   *        (string) Where the search originated from. See BrowserUsageTelemetry for
   *        allowed values.
   * @param type
   *        (string) Indicates how the user selected the search item.
   * @param where
   *        (string) Where was the search link opened (e.g. new tab, current tab, ..).
   */
  recordOneoffSearchInTelemetry(engine, source, type, where) {
    let id = this._getSearchEngineId(engine) + "." + source;
    BrowserUITelemetry.countOneoffSearchEvent(id, type, where);
    try {
      const details = {type, isOneOff: true};
      BrowserUsageTelemetry.recordSearch(engine, source, details);
    } catch (ex) {
      Cu.reportError(ex);
    }
  }
};

XPCOMUtils.defineConstant(this, "BrowserSearch", BrowserSearch);

function FillHistoryMenu(aParent) {
  // Lazily add the hover listeners on first showing and never remove them
  if (!aParent.hasStatusListener) {
    // Show history item's uri in the status bar when hovering, and clear on exit
    aParent.addEventListener("DOMMenuItemActive", function(aEvent) {
      // Only the current page should have the checked attribute, so skip it
      if (!aEvent.target.hasAttribute("checked"))
        XULBrowserWindow.setOverLink(aEvent.target.getAttribute("uri"));
    });
    aParent.addEventListener("DOMMenuItemInactive", function() {
      XULBrowserWindow.setOverLink("");
    });

    aParent.hasStatusListener = true;
  }

  // Remove old entries if any
  let children = aParent.childNodes;
  for (var i = children.length - 1; i >= 0; --i) {
    if (children[i].hasAttribute("index"))
      aParent.removeChild(children[i]);
  }

  const MAX_HISTORY_MENU_ITEMS = 15;

  const tooltipBack = gNavigatorBundle.getString("tabHistory.goBack");
  const tooltipCurrent = gNavigatorBundle.getString("tabHistory.current");
  const tooltipForward = gNavigatorBundle.getString("tabHistory.goForward");

  function updateSessionHistory(sessionHistory, initial) {
    let count = sessionHistory.entries.length;

    if (!initial) {
      if (count <= 1) {
        // if there is only one entry now, close the popup.
        aParent.hidePopup();
        return;
      } else if (aParent.id != "backForwardMenu" && !aParent.parentNode.open) {
        // if the popup wasn't open before, but now needs to be, reopen the menu.
        // It should trigger FillHistoryMenu again. This might happen with the
        // delay from click-and-hold menus but skip this for the context menu
        // (backForwardMenu) rather than figuring out how the menu should be
        // positioned and opened as it is an extreme edgecase.
        aParent.parentNode.open = true;
        return;
      }
    }

    let index = sessionHistory.index;
    let half_length = Math.floor(MAX_HISTORY_MENU_ITEMS / 2);
    let start = Math.max(index - half_length, 0);
    let end = Math.min(start == 0 ? MAX_HISTORY_MENU_ITEMS : index + half_length + 1, count);
    if (end == count) {
      start = Math.max(count - MAX_HISTORY_MENU_ITEMS, 0);
    }

    let existingIndex = 0;

    for (let j = end - 1; j >= start; j--) {
      let entry = sessionHistory.entries[j];
      let uri = entry.url;

      let item = existingIndex < children.length ?
                   children[existingIndex] : document.createElement("menuitem");

      let entryURI = BrowserUtils.makeURI(entry.url, entry.charset, null);
      item.setAttribute("uri", uri);
      item.setAttribute("label", entry.title || uri);
      item.setAttribute("index", j);

      // Cache this so that gotoHistoryIndex doesn't need the original index
      item.setAttribute("historyindex", j - index);

      if (j != index) {
        PlacesUtils.favicons.getFaviconURLForPage(entryURI, function(aURI) {
          if (aURI) {
            let iconURL = PlacesUtils.favicons.getFaviconLinkForIcon(aURI).spec;
            item.style.listStyleImage = "url(" + iconURL + ")";
          }
        });
      }

      if (j < index) {
        item.className = "unified-nav-back menuitem-iconic menuitem-with-favicon";
        item.setAttribute("tooltiptext", tooltipBack);
      } else if (j == index) {
        item.setAttribute("type", "radio");
        item.setAttribute("checked", "true");
        item.className = "unified-nav-current";
        item.setAttribute("tooltiptext", tooltipCurrent);
      } else {
        item.className = "unified-nav-forward menuitem-iconic menuitem-with-favicon";
        item.setAttribute("tooltiptext", tooltipForward);
      }

      if (!item.parentNode) {
        aParent.appendChild(item);
      }

      existingIndex++;
    }

    if (!initial) {
      let existingLength = children.length;
      while (existingIndex < existingLength) {
        aParent.removeChild(aParent.lastChild);
        existingIndex++;
      }
    }
  }

  let sessionHistory = SessionStore.getSessionHistory(gBrowser.selectedTab, updateSessionHistory);
  if (!sessionHistory)
    return false;

  // don't display the popup for a single item
  if (sessionHistory.entries.length <= 1)
    return false;

  updateSessionHistory(sessionHistory, true);
  return true;
}

function addToUrlbarHistory(aUrlToAdd) {
  if (!PrivateBrowsingUtils.isWindowPrivate(window) &&
      aUrlToAdd &&
      !aUrlToAdd.includes(" ") &&
      !/[\x00-\x1F]/.test(aUrlToAdd))
    PlacesUIUtils.markPageAsTyped(aUrlToAdd);
}

function toJavaScriptConsole()
{
  toOpenWindowByType("global:console", "chrome://global/content/console.xul");
}

function BrowserDownloadsUI() {
  if (PrivateBrowsingUtils.isWindowPrivate(window)) {
    openUILinkIn("about:downloads", "tab");
  } else {
    PlacesCommandHook.showPlacesOrganizer("Downloads");
  }
}

function toOpenWindowByType(inType, uri, features) {
  var topWindow = Services.wm.getMostRecentWindow(inType);

  if (topWindow)
    topWindow.focus();
  else if (features)
    window.open(uri, "_blank", features);
  else
    window.open(uri, "_blank", "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar");
}

function OpenBrowserWindow(options) {
  var telemetryObj = {};
  TelemetryStopwatch.start("FX_NEW_WINDOW_MS", telemetryObj);

  function newDocumentShown(doc, topic, data) {
    if (topic == "document-shown" &&
        doc != document &&
        doc.defaultView == win) {
      Services.obs.removeObserver(newDocumentShown, "document-shown");
      Services.obs.removeObserver(windowClosed, "domwindowclosed");
      TelemetryStopwatch.finish("FX_NEW_WINDOW_MS", telemetryObj);
    }
  }

  function windowClosed(subject) {
    if (subject == win) {
      Services.obs.removeObserver(newDocumentShown, "document-shown");
      Services.obs.removeObserver(windowClosed, "domwindowclosed");
    }
  }

  // Make sure to remove the 'document-shown' observer in case the window
  // is being closed right after it was opened to avoid leaking.
  Services.obs.addObserver(newDocumentShown, "document-shown", false);
  Services.obs.addObserver(windowClosed, "domwindowclosed", false);

  var charsetArg = new String();
  var handler = Components.classes["@mozilla.org/browser/clh;1"]
                          .getService(Components.interfaces.nsIBrowserHandler);
  var defaultArgs = handler.defaultArgs;
  var wintype = document.documentElement.getAttribute("windowtype");

  var extraFeatures = "";
  if (options && options.private) {
    extraFeatures = ",private";
    if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
      // Force the new window to load about:privatebrowsing instead of the default home page
      defaultArgs = "about:privatebrowsing";
    }
  } else {
    extraFeatures = ",non-private";
  }

  if (options && options.remote) {
    extraFeatures += ",remote";
  } else if (options && options.remote === false) {
    extraFeatures += ",non-remote";
  }

  // if and only if the current window is a browser window and it has a document with a character
  // set, then extract the current charset menu setting from the current document and use it to
  // initialize the new browser window...
  var win;
  if (window && (wintype == "navigator:browser") && window.content && window.content.document) {
    var DocCharset = window.content.document.characterSet;
    charsetArg = "charset=" + DocCharset;

    // we should "inherit" the charset menu setting in a new window
    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs, charsetArg);
  } else {
    // forget about the charset information.
    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs);
  }

  return win;
}

// Only here for backwards compat, we should remove this soon
function BrowserCustomizeToolbar() {
  gCustomizeMode.enter();
}

/**
 * Update the global flag that tracks whether or not any edit UI (the Edit menu,
 * edit-related items in the context menu, and edit-related toolbar buttons
 * is visible, then update the edit commands' enabled state accordingly.  We use
 * this flag to skip updating the edit commands on focus or selection changes
 * when no UI is visible to improve performance (including pageload performance,
 * since focus changes when you load a new page).
 *
 * If UI is visible, we use goUpdateGlobalEditMenuItems to set the commands'
 * enabled state so the UI will reflect it appropriately.
 *
 * If the UI isn't visible, we enable all edit commands so keyboard shortcuts
 * still work and just lazily disable them as needed when the user presses a
 * shortcut.
 *
 * This doesn't work on Mac, since Mac menus flash when users press their
 * keyboard shortcuts, so edit UI is essentially always visible on the Mac,
 * and we need to always update the edit commands.  Thus on Mac this function
 * is a no op.
 */
function updateEditUIVisibility() {
#ifndef XP_MACOSX
  let editMenuPopupState = document.getElementById("menu_EditPopup").state;
  let contextMenuPopupState = document.getElementById("contentAreaContextMenu").state;
  let placesContextMenuPopupState = document.getElementById("placesContext").state;

  // The UI is visible if the Edit menu is opening or open, if the context menu
  // is open, or if the toolbar has been customized to include the Cut, Copy,
  // or Paste toolbar buttons.
  gEditUIVisible = editMenuPopupState == "showing" ||
                   editMenuPopupState == "open" ||
                   contextMenuPopupState == "showing" ||
                   contextMenuPopupState == "open" ||
                   placesContextMenuPopupState == "showing" ||
                   placesContextMenuPopupState == "open" ||
                   document.getElementById("edit-controls") ? true : false;

  // If UI is visible, update the edit commands' enabled state to reflect
  // whether or not they are actually enabled for the current focus/selection.
  if (gEditUIVisible)
    goUpdateGlobalEditMenuItems();

  // Otherwise, enable all commands, so that keyboard shortcuts still work,
  // then lazily determine their actual enabled state when the user presses
  // a keyboard shortcut.
  else {
    goSetCommandEnabled("cmd_undo", true);
    goSetCommandEnabled("cmd_redo", true);
    goSetCommandEnabled("cmd_cut", true);
    goSetCommandEnabled("cmd_copy", true);
    goSetCommandEnabled("cmd_paste", true);
    goSetCommandEnabled("cmd_selectAll", true);
    goSetCommandEnabled("cmd_delete", true);
    goSetCommandEnabled("cmd_switchTextDirection", true);
  }
#else
  return;
#endif
}

/**
 * Opens a new tab with the userContextId specified as an attribute of
 * sourceEvent. This attribute is propagated to the top level originAttributes
 * living on the tab's docShell.
 *
 * @param event
 *        A click event on a userContext File Menu option
 */
function openNewUserContextTab(event) {
  openUILinkIn(BROWSER_NEW_TAB_URL, "tab", {
    userContextId: parseInt(event.target.getAttribute("data-usercontextid")),
  });
}

/**
 * Updates File Menu User Context UI visibility depending on
 * privacy.userContext.enabled pref state.
 */
function updateUserContextUIVisibility() {
  let menu = document.getElementById("menu_newUserContext");
  menu.hidden = !Services.prefs.getBoolPref("privacy.userContext.enabled");
  if (PrivateBrowsingUtils.isWindowPrivate(window)) {
    menu.setAttribute("disabled", "true");
  }
}

/**
 * Updates the User Context UI indicators if the browser is in a non-default context
 */
function updateUserContextUIIndicator() {
  let hbox = document.getElementById("userContext-icons");

  let userContextId = gBrowser.selectedBrowser.getAttribute("usercontextid");
  if (!userContextId) {
    hbox.setAttribute("data-identity-color", "");
    hbox.hidden = true;
    return;
  }

  let identity = ContextualIdentityService.getIdentityFromId(userContextId);
  if (!identity) {
    hbox.setAttribute("data-identity-color", "");
    hbox.hidden = true;
    return;
  }

  hbox.setAttribute("data-identity-color", identity.color);

  let label = document.getElementById("userContext-label");
  label.setAttribute("value", ContextualIdentityService.getUserContextLabel(userContextId));

  let indicator = document.getElementById("userContext-indicator");
  indicator.setAttribute("data-identity-icon", identity.icon);

  hbox.hidden = false;
}

/**
 * Makes the Character Encoding menu enabled or disabled as appropriate.
 * To be called when the View menu or the app menu is opened.
 */
function updateCharacterEncodingMenuState() {
  let charsetMenu = document.getElementById("charsetMenu");
  // gBrowser is null on Mac when the menubar shows in the context of
  // non-browser windows. The above elements may be null depending on
  // what parts of the menubar are present. E.g. no app menu on Mac.
  if (gBrowser && gBrowser.selectedBrowser.mayEnableCharacterEncodingMenu) {
    if (charsetMenu) {
      charsetMenu.removeAttribute("disabled");
    }
  } else if (charsetMenu) {
    charsetMenu.setAttribute("disabled", "true");
  }
}

var XULBrowserWindow = {
  // Stored Status, Link and Loading values
  status: "",
  defaultStatus: "",
  overLink: "",
  startTime: 0,
  statusText: "",
  isBusy: false,
  // Left here for add-on compatibility, see bug 752434
  inContentWhitelist: [],

  QueryInterface(aIID) {
    if (aIID.equals(Ci.nsIWebProgressListener) ||
        aIID.equals(Ci.nsIWebProgressListener2) ||
        aIID.equals(Ci.nsISupportsWeakReference) ||
        aIID.equals(Ci.nsIXULBrowserWindow) ||
        aIID.equals(Ci.nsISupports))
      return this;
    throw Cr.NS_NOINTERFACE;
  },

  get stopCommand() {
    delete this.stopCommand;
    return this.stopCommand = document.getElementById("Browser:Stop");
  },
  get reloadCommand() {
    delete this.reloadCommand;
    return this.reloadCommand = document.getElementById("Browser:Reload");
  },
  get statusTextField() {
    return gBrowser.getStatusPanel();
  },
  get isImage() {
    delete this.isImage;
    return this.isImage = document.getElementById("isImage");
  },
  get canViewSource() {
    delete this.canViewSource;
    return this.canViewSource = document.getElementById("canViewSource");
  },

  init() {
    // Initialize the security button's state and tooltip text.
    var securityUI = gBrowser.securityUI;
    this.onSecurityChange(null, null, securityUI.state, true);
  },

  setJSStatus() {
    // unsupported
  },

  forceInitialBrowserRemote(aRemoteType) {
    let initBrowser =
      document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");
    gBrowser.updateBrowserRemoteness(initBrowser, true, { remoteType: aRemoteType });
  },

  forceInitialBrowserNonRemote(aOpener) {
    let initBrowser =
      document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");
    gBrowser.updateBrowserRemoteness(initBrowser, false, { opener: aOpener });
  },

  setDefaultStatus(status) {
    this.defaultStatus = status;
    this.updateStatusField();
  },

  setOverLink(url, anchorElt) {
    // Encode bidirectional formatting characters.
    // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
    url = url.replace(/[\u200e\u200f\u202a\u202b\u202c\u202d\u202e]/g,
                      encodeURIComponent);

    if (gURLBar && gURLBar._mayTrimURLs /* corresponds to browser.urlbar.trimURLs */)
      url = trimURL(url);

    this.overLink = url;
    LinkTargetDisplay.update();
  },

  showTooltip(x, y, tooltip, direction) {
    if (Cc["@mozilla.org/widget/dragservice;1"].getService(Ci.nsIDragService).
        getCurrentSession()) {
      return;
    }

    // The x,y coordinates are relative to the <browser> element using
    // the chrome zoom level.
    let elt = document.getElementById("remoteBrowserTooltip");
    elt.label = tooltip;
    elt.style.direction = direction;

    let anchor = gBrowser.selectedBrowser;
    elt.openPopupAtScreen(anchor.boxObject.screenX + x, anchor.boxObject.screenY + y, false, null);
  },

  hideTooltip() {
    let elt = document.getElementById("remoteBrowserTooltip");
    elt.hidePopup();
  },

  getTabCount() {
    return gBrowser.tabs.length;
  },

  updateStatusField() {
    var text, type, types = ["overLink"];
    if (this._busyUI)
      types.push("status");
    types.push("defaultStatus");
    for (type of types) {
      text = this[type];
      if (text)
        break;
    }

    // check the current value so we don't trigger an attribute change
    // and cause needless (slow!) UI updates
    if (this.statusText != text) {
      let field = this.statusTextField;
      field.setAttribute("previoustype", field.getAttribute("type"));
      field.setAttribute("type", type);
      field.label = text;
      field.setAttribute("crop", type == "overLink" ? "center" : "end");
      this.statusText = text;
    }
  },

  // Called before links are navigated to to allow us to retarget them if needed.
  onBeforeLinkTraversal(originalTarget, linkURI, linkNode, isAppTab) {
    return BrowserUtils.onBeforeLinkTraversal(originalTarget, linkURI, linkNode, isAppTab);
  },

  // Check whether this URI should load in the current process
  shouldLoadURI(aDocShell, aURI, aReferrer, aHasPostData, aTriggeringPrincipal) {
    if (!gMultiProcessBrowser)
      return true;

    let browser = aDocShell.QueryInterface(Ci.nsIDocShellTreeItem)
                           .sameTypeRootTreeItem
                           .QueryInterface(Ci.nsIDocShell)
                           .chromeEventHandler;

    // Ignore loads that aren't in the main tabbrowser
    if (browser.localName != "browser" || !browser.getTabBrowser || browser.getTabBrowser() != gBrowser)
      return true;

    if (!E10SUtils.shouldLoadURI(aDocShell, aURI, aReferrer, aHasPostData)) {
      // XXX: Do we want to complain if we have post data but are still
      // redirecting the load? Perhaps a telemetry probe? Theoretically we
      // shouldn't do this, as it throws out data. See bug 1348018.
      E10SUtils.redirectLoad(aDocShell, aURI, aReferrer, aTriggeringPrincipal, false);
      return false;
    }

    return true;
  },

  onProgressChange(aWebProgress, aRequest,
                             aCurSelfProgress, aMaxSelfProgress,
                             aCurTotalProgress, aMaxTotalProgress) {
    // Do nothing.
  },

  onProgressChange64(aWebProgress, aRequest,
                               aCurSelfProgress, aMaxSelfProgress,
                               aCurTotalProgress, aMaxTotalProgress) {
    return this.onProgressChange(aWebProgress, aRequest,
      aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress,
      aMaxTotalProgress);
  },

  // This function fires only for the currently selected tab.
  onStateChange(aWebProgress, aRequest, aStateFlags, aStatus) {
    const nsIWebProgressListener = Ci.nsIWebProgressListener;
    const nsIChannel = Ci.nsIChannel;

    let browser = gBrowser.selectedBrowser;

    if (aStateFlags & nsIWebProgressListener.STATE_START &&
        aStateFlags & nsIWebProgressListener.STATE_IS_NETWORK) {

      if (aRequest && aWebProgress.isTopLevel) {
        // clear out feed data
        browser.feeds = null;

        // clear out search-engine data
        browser.engines = null;
      }

      this.isBusy = true;

      if (!(aStateFlags & nsIWebProgressListener.STATE_RESTORING)) {
        this._busyUI = true;

        // XXX: This needs to be based on window activity...
        this.stopCommand.removeAttribute("disabled");
        CombinedStopReload.switchToStop();
      }
    } else if (aStateFlags & nsIWebProgressListener.STATE_STOP) {
      // This (thanks to the filter) is a network stop or the last
      // request stop outside of loading the document, stop throbbers
      // and progress bars and such
      if (aRequest) {
        let msg = "";
        let location;
        let canViewSource = true;
        // Get the URI either from a channel or a pseudo-object
        if (aRequest instanceof nsIChannel || "URI" in aRequest) {
          location = aRequest.URI;

          // For keyword URIs clear the user typed value since they will be changed into real URIs
          if (location.scheme == "keyword" && aWebProgress.isTopLevel)
            gBrowser.userTypedValue = null;

          canViewSource = !Services.prefs.getBoolPref("view_source.tab") ||
                          location.scheme != "view-source";

          if (location.spec != "about:blank") {
            switch (aStatus) {
              case Components.results.NS_ERROR_NET_TIMEOUT:
                msg = gNavigatorBundle.getString("nv_timeout");
                break;
            }
          }
        }

        this.status = "";
        this.setDefaultStatus(msg);

        // Disable menu entries for images, enable otherwise
        if (browser.documentContentType && BrowserUtils.mimeTypeIsTextBased(browser.documentContentType)) {
          this.isImage.removeAttribute("disabled");
        } else {
          canViewSource = false;
          this.isImage.setAttribute("disabled", "true");
        }

        if (canViewSource) {
          this.canViewSource.removeAttribute("disabled");
        } else {
          this.canViewSource.setAttribute("disabled", "true");
        }
      }

      this.isBusy = false;

      if (this._busyUI) {
        this._busyUI = false;

        this.stopCommand.setAttribute("disabled", "true");
        CombinedStopReload.switchToReload(aRequest instanceof Ci.nsIRequest);
      }
    }
  },

  onLocationChange(aWebProgress, aRequest, aLocationURI, aFlags) {
    var location = aLocationURI ? aLocationURI.spec : "";

    // If displayed, hide the form validation popup.
    FormValidationHandler.hidePopup();

    let pageTooltip = document.getElementById("aHTMLTooltip");
    let tooltipNode = pageTooltip.triggerNode;
    if (tooltipNode) {
      // Optimise for the common case
      if (aWebProgress.isTopLevel) {
        pageTooltip.hidePopup();
      } else {
        for (let tooltipWindow = tooltipNode.ownerGlobal;
             tooltipWindow != tooltipWindow.parent;
             tooltipWindow = tooltipWindow.parent) {
          if (tooltipWindow == aWebProgress.DOMWindow) {
            pageTooltip.hidePopup();
            break;
          }
        }
      }
    }

    let browser = gBrowser.selectedBrowser;

    // Disable menu entries for images, enable otherwise
    if (browser.documentContentType && BrowserUtils.mimeTypeIsTextBased(browser.documentContentType))
      this.isImage.removeAttribute("disabled");
    else
      this.isImage.setAttribute("disabled", "true");

    this.hideOverLinkImmediately = true;
    this.setOverLink("", null);
    this.hideOverLinkImmediately = false;

    // We should probably not do this if the value has changed since the user
    // searched
    // Update urlbar only if a new page was loaded on the primary content area
    // Do not update urlbar if there was a subframe navigation

    if (aWebProgress.isTopLevel) {
      if ((location == "about:blank" && checkEmptyPageOrigin()) ||
          location == "") {  // Second condition is for new tabs, otherwise
                             // reload function is enabled until tab is refreshed.
        this.reloadCommand.setAttribute("disabled", "true");
      } else {
        this.reloadCommand.removeAttribute("disabled");
      }

      URLBarSetURI(aLocationURI);

      BookmarkingUI.onLocationChange();

      gIdentityHandler.onLocationChange();

      gTabletModePageCounter.inc();

      // Utility functions for disabling find
      var shouldDisableFind = function(aDocument) {
        let docElt = aDocument.documentElement;
        return docElt && docElt.getAttribute("disablefastfind") == "true";
      }

      var disableFindCommands = function(aDisable) {
        let findCommands = [document.getElementById("cmd_find"),
                            document.getElementById("cmd_findAgain"),
                            document.getElementById("cmd_findPrevious")];
        for (let elt of findCommands) {
          if (aDisable)
            elt.setAttribute("disabled", "true");
          else
            elt.removeAttribute("disabled");
        }
      }

      var onContentRSChange = function(e) {
        if (e.target.readyState != "interactive" && e.target.readyState != "complete")
          return;

        e.target.removeEventListener("readystatechange", onContentRSChange);
        disableFindCommands(shouldDisableFind(e.target));
      }

      // Disable find commands in documents that ask for them to be disabled.
      if (!gMultiProcessBrowser && aLocationURI &&
          (aLocationURI.schemeIs("about") || aLocationURI.schemeIs("chrome"))) {
        // Don't need to re-enable/disable find commands for same-document location changes
        // (e.g. the replaceStates in about:addons)
        if (!(aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)) {
          if (content.document.readyState == "interactive" || content.document.readyState == "complete")
            disableFindCommands(shouldDisableFind(content.document));
          else {
            content.document.addEventListener("readystatechange", onContentRSChange);
          }
        }
      } else
        disableFindCommands(false);

      // Try not to instantiate gCustomizeMode as much as possible,
      // so don't use CustomizeMode.jsm to check for URI or customizing.
      if (location == "about:blank" &&
          gBrowser.selectedTab.hasAttribute("customizemode")) {
        gCustomizeMode.enter();
      } else if (CustomizationHandler.isEnteringCustomizeMode ||
                 CustomizationHandler.isCustomizing()) {
        gCustomizeMode.exit();
      }
    }
    UpdateBackForwardCommands(gBrowser.webNavigation);
    ReaderParent.updateReaderButton(gBrowser.selectedBrowser);

    gGestureSupport.restoreRotationState();

    // See bug 358202, when tabs are switched during a drag operation,
    // timers don't fire on windows (bug 203573)
    if (aRequest)
      setTimeout(function() { XULBrowserWindow.asyncUpdateUI(); }, 0);
    else
      this.asyncUpdateUI();
  },

  asyncUpdateUI() {
    FeedHandler.updateFeeds();
    BrowserSearch.updateOpenSearchBadge();
  },

  // Left here for add-on compatibility, see bug 752434
  hideChromeForLocation() {},

  onStatusChange(aWebProgress, aRequest, aStatus, aMessage) {
    this.status = aMessage;
    this.updateStatusField();
  },

  // Properties used to cache security state used to update the UI
  _state: null,
  _lastLocation: null,

  // This is called in multiple ways:
  //  1. Due to the nsIWebProgressListener.onSecurityChange notification.
  //  2. Called by tabbrowser.xml when updating the current browser.
  //  3. Called directly during this object's initializations.
  // aRequest will be null always in case 2 and 3, and sometimes in case 1 (for
  // instance, there won't be a request when STATE_BLOCKED_TRACKING_CONTENT is observed).
  onSecurityChange(aWebProgress, aRequest, aState, aIsSimulated) {
    // Don't need to do anything if the data we use to update the UI hasn't
    // changed
    let uri = gBrowser.currentURI;
    let spec = uri.spec;
    if (this._state == aState &&
        this._lastLocation == spec) {
      // Switching to a tab of the same URL doesn't change most security
      // information, but tab specific permissions may be different.
      gIdentityHandler.refreshIdentityBlock();
      return;
    }
    this._state = aState;
    this._lastLocation = spec;

    if (typeof(aIsSimulated) != "boolean" && typeof(aIsSimulated) != "undefined") {
      throw "onSecurityChange: aIsSimulated receieved an unexpected type";
    }

    // Make sure the "https" part of the URL is striked out or not,
    // depending on the current mixed active content blocking state.
    gURLBar.formatValue();

    try {
      uri = Services.uriFixup.createExposableURI(uri);
    } catch (e) {}
    gIdentityHandler.updateIdentity(this._state, uri);
    TrackingProtection.onSecurityChange(this._state, aIsSimulated);
  },

  // simulate all change notifications after switching tabs
  onUpdateCurrentBrowser: function XWB_onUpdateCurrentBrowser(aStateFlags, aStatus, aMessage, aTotalProgress) {
    if (FullZoom.updateBackgroundTabs)
      FullZoom.onLocationChange(gBrowser.currentURI, true);
    var nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
    var loadingDone = aStateFlags & nsIWebProgressListener.STATE_STOP;
    // use a pseudo-object instead of a (potentially nonexistent) channel for getting
    // a correct error message - and make sure that the UI is always either in
    // loading (STATE_START) or done (STATE_STOP) mode
    this.onStateChange(
      gBrowser.webProgress,
      { URI: gBrowser.currentURI },
      loadingDone ? nsIWebProgressListener.STATE_STOP : nsIWebProgressListener.STATE_START,
      aStatus
    );
    // status message and progress value are undefined if we're done with loading
    if (loadingDone)
      return;
    this.onStatusChange(gBrowser.webProgress, null, 0, aMessage);
  },

  navigateAndRestoreByIndex: function XWB_navigateAndRestoreByIndex(aBrowser, aIndex) {
    let tab = gBrowser.getTabForBrowser(aBrowser);
    if (tab) {
      SessionStore.navigateAndRestore(tab, {}, aIndex);
      return;
    }

    throw new Error("Trying to navigateAndRestore a browser which was " +
                    "not attached to this tabbrowser is unsupported");
  }
};

var LinkTargetDisplay = {
  get DELAY_SHOW() {
     delete this.DELAY_SHOW;
     return this.DELAY_SHOW = Services.prefs.getIntPref("browser.overlink-delay");
  },

  DELAY_HIDE: 250,
  _timer: 0,

  get _isVisible() {
    return XULBrowserWindow.statusTextField.label != "";
  },

  update() {
    clearTimeout(this._timer);
    window.removeEventListener("mousemove", this, true);

    if (!XULBrowserWindow.overLink) {
      if (XULBrowserWindow.hideOverLinkImmediately)
        this._hide();
      else
        this._timer = setTimeout(this._hide.bind(this), this.DELAY_HIDE);
      return;
    }

    if (this._isVisible) {
      XULBrowserWindow.updateStatusField();
    } else {
      // Let the display appear when the mouse doesn't move within the delay
      this._showDelayed();
      window.addEventListener("mousemove", this, true);
    }
  },

  handleEvent(event) {
    switch (event.type) {
      case "mousemove":
        // Restart the delay since the mouse was moved
        clearTimeout(this._timer);
        this._showDelayed();
        break;
    }
  },

  _showDelayed() {
    this._timer = setTimeout(function(self) {
      XULBrowserWindow.updateStatusField();
      window.removeEventListener("mousemove", self, true);
    }, this.DELAY_SHOW, this);
  },

  _hide() {
    clearTimeout(this._timer);

    XULBrowserWindow.updateStatusField();
  }
};

var CombinedStopReload = {
  init() {
    if (this._initialized)
      return;

    let reload = document.getElementById("urlbar-reload-button");
    let stop = document.getElementById("urlbar-stop-button");
    if (!stop || !reload || reload.nextSibling != stop)
      return;

    this._initialized = true;
    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
      reload.setAttribute("displaystop", "true");
    stop.addEventListener("click", this);
    this.reload = reload;
    this.stop = stop;
  },

  uninit() {
    if (!this._initialized)
      return;

    this._cancelTransition();
    this._initialized = false;
    this.stop.removeEventListener("click", this);
    this.reload = null;
    this.stop = null;
  },

  handleEvent(event) {
    // the only event we listen to is "click" on the stop button
    if (event.button == 0 &&
        !this.stop.disabled)
      this._stopClicked = true;
  },

  switchToStop() {
    if (!this._initialized)
      return;

    this._cancelTransition();
    this.reload.setAttribute("displaystop", "true");
  },

  switchToReload(aDelay) {
    if (!this._initialized)
      return;

    this.reload.removeAttribute("displaystop");

    if (!aDelay || this._stopClicked) {
      this._stopClicked = false;
      this._cancelTransition();
      this.reload.disabled = XULBrowserWindow.reloadCommand
                                             .getAttribute("disabled") == "true";
      return;
    }

    if (this._timer)
      return;

    // Temporarily disable the reload button to prevent the user from
    // accidentally reloading the page when intending to click the stop button
    this.reload.disabled = true;
    this._timer = setTimeout(function(self) {
      self._timer = 0;
      self.reload.disabled = XULBrowserWindow.reloadCommand
                                             .getAttribute("disabled") == "true";
    }, 650, this);
  },

  _cancelTransition() {
    if (this._timer) {
      clearTimeout(this._timer);
      this._timer = 0;
    }
  }
};

var TabsProgressListener = {
  // Keep track of which browsers we've started load timers for, since
  // we won't see STATE_START events for pre-rendered tabs.
  _startedLoadTimer: new WeakSet(),

  onStateChange(aBrowser, aWebProgress, aRequest, aStateFlags, aStatus) {
    // Collect telemetry data about tab load times.
    if (aWebProgress.isTopLevel && (!aRequest.originalURI || aRequest.originalURI.spec.scheme != "about")) {
      if (aStateFlags & Ci.nsIWebProgressListener.STATE_IS_WINDOW) {
        if (aStateFlags & Ci.nsIWebProgressListener.STATE_START) {
          this._startedLoadTimer.add(aBrowser);
          TelemetryStopwatch.start("FX_PAGE_LOAD_MS", aBrowser);
          Services.telemetry.getHistogramById("FX_TOTAL_TOP_VISITS").add(true);
        } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
                   this._startedLoadTimer.has(aBrowser)) {
          this._startedLoadTimer.delete(aBrowser);
          TelemetryStopwatch.finish("FX_PAGE_LOAD_MS", aBrowser);
        }
      } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
                 aStatus == Cr.NS_BINDING_ABORTED &&
                 this._startedLoadTimer.has(aBrowser)) {
        this._startedLoadTimer.delete(aBrowser);
        TelemetryStopwatch.cancel("FX_PAGE_LOAD_MS", aBrowser);
      }
    }

    // We used to listen for clicks in the browser here, but when that
    // became unnecessary, removing the code below caused focus issues.
    // This code should be removed. Tracked in bug 1337794.
    let isRemoteBrowser = aBrowser.isRemoteBrowser;
    // We check isRemoteBrowser here to avoid requesting the doc CPOW
    let doc = isRemoteBrowser ? null : aWebProgress.DOMWindow.document;

    if (!isRemoteBrowser &&
        aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
        Components.isSuccessCode(aStatus) &&
        doc.documentURI.startsWith("about:") &&
        !doc.documentURI.toLowerCase().startsWith("about:blank") &&
        !doc.documentURI.toLowerCase().startsWith("about:home") &&
        !doc.documentElement.hasAttribute("hasBrowserHandlers")) {
      // STATE_STOP may be received twice for documents, thus store an
      // attribute to ensure handling it just once.
      doc.documentElement.setAttribute("hasBrowserHandlers", "true");
      aBrowser.addEventListener("pagehide", function onPageHide(event) {
        if (event.target.defaultView.frameElement)
          return;
        aBrowser.removeEventListener("pagehide", onPageHide, true);
        if (event.target.documentElement)
          event.target.documentElement.removeAttribute("hasBrowserHandlers");
      }, true);
    }
  },

  onLocationChange(aBrowser, aWebProgress, aRequest, aLocationURI,
                             aFlags) {
    // Filter out location changes caused by anchor navigation
    // or history.push/pop/replaceState.
    if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT) {
      // Reader mode actually cares about these:
      let mm = gBrowser.selectedBrowser.messageManager;
      mm.sendAsyncMessage("Reader:PushState", {isArticle: gBrowser.selectedBrowser.isArticle});
      return;
    }

    // Filter out location changes in sub documents.
    if (!aWebProgress.isTopLevel)
      return;

    // Only need to call locationChange if the PopupNotifications object
    // for this window has already been initialized (i.e. its getter no
    // longer exists)
    if (!Object.getOwnPropertyDescriptor(window, "PopupNotifications").get)
      PopupNotifications.locationChange(aBrowser);

    let tab = gBrowser.getTabForBrowser(aBrowser);
    if (tab && tab._sharingState) {
      gBrowser.setBrowserSharing(aBrowser, {});
    }
    webrtcUI.forgetStreamsFromBrowser(aBrowser);

    gBrowser.getNotificationBox(aBrowser).removeTransientNotifications();

    FullZoom.onLocationChange(aLocationURI, false, aBrowser);
  },
}

function nsBrowserAccess() { }

nsBrowserAccess.prototype = {
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIBrowserDOMWindow, Ci.nsISupports]),

  _openURIInNewTab(aURI, aReferrer, aReferrerPolicy, aIsPrivate,
                             aIsExternal, aForceNotRemote = false,
                             aUserContextId = Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID,
                             aOpener = null, aTriggeringPrincipal = null) {
    let win, needToFocusWin;

    // try the current window.  if we're in a popup, fall back on the most recent browser window
    if (window.toolbar.visible)
      win = window;
    else {
      win = RecentWindow.getMostRecentBrowserWindow({private: aIsPrivate});
      needToFocusWin = true;
    }

    if (!win) {
      // we couldn't find a suitable window, a new one needs to be opened.
      return null;
    }

    if (aIsExternal && (!aURI || aURI.spec == "about:blank")) {
      win.BrowserOpenTab(); // this also focuses the location bar
      win.focus();
      return win.gBrowser.selectedBrowser;
    }

    let loadInBackground = gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground");

    let tab = win.gBrowser.loadOneTab(aURI ? aURI.spec : "about:blank", {
                                      triggeringPrincipal: aTriggeringPrincipal,
                                      referrerURI: aReferrer,
                                      referrerPolicy: aReferrerPolicy,
                                      userContextId: aUserContextId,
                                      fromExternal: aIsExternal,
                                      inBackground: loadInBackground,
                                      forceNotRemote: aForceNotRemote,
                                      opener: aOpener,
                                      });
    let browser = win.gBrowser.getBrowserForTab(tab);

    if (needToFocusWin || (!loadInBackground && aIsExternal))
      win.focus();

    return browser;
  },

  openURI(aURI, aOpener, aWhere, aFlags) {
    // This function should only ever be called if we're opening a URI
    // from a non-remote browser window (via nsContentTreeOwner).
    if (aOpener && Cu.isCrossProcessWrapper(aOpener)) {
      Cu.reportError("nsBrowserAccess.openURI was passed a CPOW for aOpener. " +
                     "openURI should only ever be called from non-remote browsers.");
      throw Cr.NS_ERROR_FAILURE;
    }

    var newWindow = null;
    var isExternal = !!(aFlags & Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);

    if (aOpener && isExternal) {
      Cu.reportError("nsBrowserAccess.openURI did not expect an opener to be " +
                     "passed if the context is OPEN_EXTERNAL.");
      throw Cr.NS_ERROR_FAILURE;
    }

    if (isExternal && aURI && aURI.schemeIs("chrome")) {
      dump("use --chrome command-line option to load external chrome urls\n");
      return null;
    }

    if (aWhere == Ci.nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW) {
      if (isExternal &&
          gPrefService.prefHasUserValue("browser.link.open_newwindow.override.external"))
        aWhere = gPrefService.getIntPref("browser.link.open_newwindow.override.external");
      else
        aWhere = gPrefService.getIntPref("browser.link.open_newwindow");
    }

    let referrer = aOpener ? makeURI(aOpener.location.href) : null;
    let triggeringPrincipal = null;
    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_UNSET;
    if (aOpener && aOpener.document) {
      referrerPolicy = aOpener.document.referrerPolicy;
      triggeringPrincipal = aOpener.document.nodePrincipal;
    }
    let isPrivate = aOpener
                  ? PrivateBrowsingUtils.isContentWindowPrivate(aOpener)
                  : PrivateBrowsingUtils.isWindowPrivate(window);

    switch (aWhere) {
      case Ci.nsIBrowserDOMWindow.OPEN_NEWWINDOW :
        // FIXME: Bug 408379. So how come this doesn't send the
        // referrer like the other loads do?
        var url = aURI ? aURI.spec : "about:blank";
        let features = "all,dialog=no";
        if (isPrivate) {
          features += ",private";
        }
        // Pass all params to openDialog to ensure that "url" isn't passed through
        // loadOneOrMoreURIs, which splits based on "|"
        newWindow = openDialog(getBrowserURL(), "_blank", features, url, null, null, null);
        break;
      case Ci.nsIBrowserDOMWindow.OPEN_NEWTAB :
        // If we have an opener, that means that the caller is expecting access
        // to the nsIDOMWindow of the opened tab right away. For e10s windows,
        // this means forcing the newly opened browser to be non-remote so that
        // we can hand back the nsIDOMWindow. The XULBrowserWindow.shouldLoadURI
        // will do the job of shuttling off the newly opened browser to run in
        // the right process once it starts loading a URI.
        let forceNotRemote = !!aOpener;
        let userContextId = aOpener && aOpener.document
                              ? aOpener.document.nodePrincipal.originAttributes.userContextId
                              : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID;
        let openerWindow = (aFlags & Ci.nsIBrowserDOMWindow.OPEN_NO_OPENER) ? null : aOpener;
        let browser = this._openURIInNewTab(aURI, referrer, referrerPolicy,
                                            isPrivate, isExternal,
                                            forceNotRemote, userContextId,
                                            openerWindow, triggeringPrincipal);
        if (browser)
          newWindow = browser.contentWindow;
        break;
      default : // OPEN_CURRENTWINDOW or an illegal value
        newWindow = content;
        if (aURI) {
          let loadflags = isExternal ?
                            Ci.nsIWebNavigation.LOAD_FLAGS_FROM_EXTERNAL :
                            Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
          gBrowser.loadURIWithFlags(aURI.spec, {
                                    triggeringPrincipal,
                                    flags: loadflags,
                                    referrerURI: referrer,
                                    referrerPolicy,
                                    });
        }
        if (!gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground"))
          window.focus();
    }
    return newWindow;
  },

  openURIInFrame: function browser_openURIInFrame(aURI, aParams, aWhere, aFlags) {
    if (aWhere != Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
      dump("Error: openURIInFrame can only open in new tabs");
      return null;
    }

    var isExternal = !!(aFlags & Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);

    var userContextId = aParams.openerOriginAttributes &&
                        ("userContextId" in aParams.openerOriginAttributes)
                          ? aParams.openerOriginAttributes.userContextId
                          : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID

    let referrer = aParams.referrer ? makeURI(aParams.referrer) : null;
    let browser = this._openURIInNewTab(aURI, referrer,
                                        aParams.referrerPolicy,
                                        aParams.isPrivate,
                                        isExternal, false,
                                        userContextId, null,
                                        aParams.triggeringPrincipal);
    if (browser)
      return browser.QueryInterface(Ci.nsIFrameLoaderOwner);

    return null;
  },

  isTabContentWindow(aWindow) {
    return gBrowser.browsers.some(browser => browser.contentWindow == aWindow);
  },

  canClose() {
    return CanCloseWindow();
  },
}

function getTogglableToolbars() {
  let toolbarNodes = Array.slice(gNavToolbox.childNodes);
  toolbarNodes = toolbarNodes.concat(gNavToolbox.externalToolbars);
  toolbarNodes = toolbarNodes.filter(node => node.getAttribute("toolbarname"));
  return toolbarNodes;
}

function onViewToolbarsPopupShowing(aEvent, aInsertPoint) {
  var popup = aEvent.target;
  if (popup != aEvent.currentTarget)
    return;

  // Empty the menu
  for (var i = popup.childNodes.length - 1; i >= 0; --i) {
    var deadItem = popup.childNodes[i];
    if (deadItem.hasAttribute("toolbarId"))
      popup.removeChild(deadItem);
  }

  var firstMenuItem = aInsertPoint || popup.firstChild;

  let toolbarNodes = getTogglableToolbars();

  for (let toolbar of toolbarNodes) {
    let menuItem = document.createElement("menuitem");
    let hidingAttribute = toolbar.getAttribute("type") == "menubar" ?
                          "autohide" : "collapsed";
    menuItem.setAttribute("id", "toggle_" + toolbar.id);
    menuItem.setAttribute("toolbarId", toolbar.id);
    menuItem.setAttribute("type", "checkbox");
    menuItem.setAttribute("label", toolbar.getAttribute("toolbarname"));
    menuItem.setAttribute("checked", toolbar.getAttribute(hidingAttribute) != "true");
    menuItem.setAttribute("accesskey", toolbar.getAttribute("accesskey"));
    if (popup.id != "toolbar-context-menu")
      menuItem.setAttribute("key", toolbar.getAttribute("key"));

    popup.insertBefore(menuItem, firstMenuItem);

    menuItem.addEventListener("command", onViewToolbarCommand);
  }


  let moveToPanel = popup.querySelector(".customize-context-moveToPanel");
  let removeFromToolbar = popup.querySelector(".customize-context-removeFromToolbar");
  // View -> Toolbars menu doesn't have the moveToPanel or removeFromToolbar items.
  if (!moveToPanel || !removeFromToolbar) {
    return;
  }

  // triggerNode can be a nested child element of a toolbaritem.
  let toolbarItem = popup.triggerNode;

  if (toolbarItem && toolbarItem.localName == "toolbarpaletteitem") {
    toolbarItem = toolbarItem.firstChild;
  } else if (toolbarItem && toolbarItem.localName != "toolbar") {
    while (toolbarItem && toolbarItem.parentNode) {
      let parent = toolbarItem.parentNode;
      if ((parent.classList && parent.classList.contains("customization-target")) ||
          parent.getAttribute("overflowfortoolbar") || // Needs to work in the overflow list as well.
          parent.localName == "toolbarpaletteitem" ||
          parent.localName == "toolbar")
        break;
      toolbarItem = parent;
    }
  } else {
    toolbarItem = null;
  }

  let showTabStripItems = toolbarItem && toolbarItem.id == "tabbrowser-tabs";
  for (let node of popup.querySelectorAll('menuitem[contexttype="toolbaritem"]')) {
    node.hidden = showTabStripItems;
  }

  for (let node of popup.querySelectorAll('menuitem[contexttype="tabbar"]')) {
    node.hidden = !showTabStripItems;
  }

  if (showTabStripItems) {
    PlacesCommandHook.updateBookmarkAllTabsCommand();

    let haveMultipleTabs = gBrowser.visibleTabs.length > 1;
    document.getElementById("toolbar-context-reloadAllTabs").disabled = !haveMultipleTabs;

    document.getElementById("toolbar-context-undoCloseTab").disabled =
      SessionStore.getClosedTabCount(window) == 0;
    return;
  }

  // In some cases, we will exit the above loop with toolbarItem being the
  // xul:document. That has no parentNode, and we should disable the items in
  // this case.
  let movable = toolbarItem && toolbarItem.parentNode &&
                CustomizableUI.isWidgetRemovable(toolbarItem);
  if (movable) {
    moveToPanel.removeAttribute("disabled");
    removeFromToolbar.removeAttribute("disabled");
  } else {
    moveToPanel.setAttribute("disabled", true);
    removeFromToolbar.setAttribute("disabled", true);
  }
}

function onViewToolbarCommand(aEvent) {
  var toolbarId = aEvent.originalTarget.getAttribute("toolbarId");
  var isVisible = aEvent.originalTarget.getAttribute("checked") == "true";
  CustomizableUI.setToolbarVisibility(toolbarId, isVisible);
}

function setToolbarVisibility(toolbar, isVisible, persist = true) {
  let hidingAttribute;
  if (toolbar.getAttribute("type") == "menubar") {
    hidingAttribute = "autohide";
#ifdef XP_LINUX
    Services.prefs.setBoolPref("ui.key.menuAccessKeyFocuses", !isVisible);
#endif
  } else {
    hidingAttribute = "collapsed";
  }

  toolbar.setAttribute(hidingAttribute, !isVisible);
  if (persist) {
    document.persist(toolbar.id, hidingAttribute);
  }

  let eventParams = {
    detail: {
      visible: isVisible
    },
    bubbles: true
  };
  let event = new CustomEvent("toolbarvisibilitychange", eventParams);
  toolbar.dispatchEvent(event);

  PlacesToolbarHelper.init();
  BookmarkingUI.onToolbarVisibilityChange();
  if (isVisible)
    ToolbarIconColor.inferFromText();
}

var TabletModeUpdater = {
  init() {
#ifdef XP_WIN
    if (Services.vc.compare(Services.sysinfo.getProperty("version"), "10") >= 0) {
      this.update(WindowsUIUtils.inTabletMode);
      Services.obs.addObserver(this, "tablet-mode-change", false);
    }
#endif
  },

  uninit() {
#ifdef XP_WIN
    if (Services.vc.compare(Services.sysinfo.getProperty("version"), "10") >= 0) {
      Services.obs.removeObserver(this, "tablet-mode-change");
    }
#endif
  },

  observe(subject, topic, data) {
    this.update(data == "tablet-mode");
  },

  update(isInTabletMode) {
    let wasInTabletMode = document.documentElement.hasAttribute("tabletmode");
    if (isInTabletMode) {
      document.documentElement.setAttribute("tabletmode", "true");
    } else {
      document.documentElement.removeAttribute("tabletmode");
    }
    if (wasInTabletMode != isInTabletMode) {
      TabsInTitlebar.updateAppearance(true);
    }
  },
};

var gTabletModePageCounter = {
  enabled: false,
  inc() {
#ifdef XP_WIN
    this.enabled = Services.vc.compare(Services.sysinfo.getProperty("version"), "10") >= 0;
#else
    this.enabled = false;
#endif
    if (!this.enabled) {
      this.inc = () => {};
      return;
    }
    this.inc = this._realInc;
    this.inc();
  },

  _desktopCount: 0,
  _tabletCount: 0,
  _realInc() {
    let inTabletMode = document.documentElement.hasAttribute("tabletmode");
    this[inTabletMode ? "_tabletCount" : "_desktopCount"]++;
  },

  finish() {
    if (this.enabled) {
      let histogram = Services.telemetry.getKeyedHistogramById("FX_TABLETMODE_PAGE_LOAD");
      histogram.add("tablet", this._tabletCount);
      histogram.add("desktop", this._desktopCount);
    }
  },
};

function displaySecurityInfo() {
  BrowserPageInfo(null, "securityTab");
}


var gHomeButton = {
  prefDomain: "browser.startup.homepage",
  observe(aSubject, aTopic, aPrefName) {
    if (aTopic != "nsPref:changed" || aPrefName != this.prefDomain)
      return;

    this.updateTooltip();
  },

  updateTooltip(homeButton) {
    if (!homeButton)
      homeButton = document.getElementById("home-button");
    if (homeButton) {
      var homePage = this.getHomePage();
      homePage = homePage.replace(/\|/g, ", ");
      if (["about:home", "about:newtab"].includes(homePage.toLowerCase()))
        homeButton.setAttribute("tooltiptext", homeButton.getAttribute("aboutHomeOverrideTooltip"));
      else
        homeButton.setAttribute("tooltiptext", homePage);
    }
  },

  getHomePage() {
    var url;
    try {
      url = gPrefService.getComplexValue(this.prefDomain,
                                Components.interfaces.nsIPrefLocalizedString).data;
    } catch (e) {
    }

    // use this if we can't find the pref
    if (!url) {
      var configBundle = Services.strings
                                 .createBundle("chrome://branding/locale/browserconfig.properties");
      url = configBundle.GetStringFromName(this.prefDomain);
    }

    return url;
  },
};

const nodeToTooltipMap = {
  "bookmarks-menu-button": "bookmarksMenuButton.tooltip",
  "new-window-button": "newWindowButton.tooltip",
  "new-tab-button": "newTabButton.tooltip",
  "tabs-newtab-button": "newTabButton.tooltip",
  "fullscreen-button": "fullscreenButton.tooltip",
  "downloads-button": "downloads.tooltip",
};
const nodeToShortcutMap = {
  "bookmarks-menu-button": "manBookmarkKb",
  "new-window-button": "key_newNavigator",
  "new-tab-button": "key_newNavigatorTab",
  "tabs-newtab-button": "key_newNavigatorTab",
  "fullscreen-button": "key_fullScreen",
  "downloads-button": "key_openDownloads"
};

#ifdef XP_MACOSX
nodeToTooltipMap["print-button"] = "printButton.tooltip";
nodeToShortcutMap["print-button"] = "printKb";
#endif

const gDynamicTooltipCache = new Map();
function UpdateDynamicShortcutTooltipText(aTooltip) {
  let nodeId = aTooltip.triggerNode.id || aTooltip.triggerNode.getAttribute("anonid");
  if (!gDynamicTooltipCache.has(nodeId) && nodeId in nodeToTooltipMap) {
    let strId = nodeToTooltipMap[nodeId];
    let args = [];
    if (nodeId in nodeToShortcutMap) {
      let shortcutId = nodeToShortcutMap[nodeId];
      let shortcut = document.getElementById(shortcutId);
      if (shortcut) {
        args.push(ShortcutUtils.prettifyShortcut(shortcut));
      }
    }
    gDynamicTooltipCache.set(nodeId, gNavigatorBundle.getFormattedString(strId, args));
  }
  aTooltip.setAttribute("label", gDynamicTooltipCache.get(nodeId));
}

function getBrowserSelection(aCharLen) {
  Deprecated.warning("getBrowserSelection",
                     "https://bugzilla.mozilla.org/show_bug.cgi?id=1134769");

  let focusedElement = document.activeElement;
  if (focusedElement && focusedElement.localName == "browser" &&
      focusedElement.isRemoteBrowser) {
    throw "getBrowserSelection doesn't support child process windows";
  }

  return BrowserUtils.getSelectionDetails(window, aCharLen).text;
}

var gWebPanelURI;
function openWebPanel(title, uri) {
  // Ensure that the web panels sidebar is open.
  SidebarUI.show("viewWebPanelsSidebar");

  // Set the title of the panel.
  SidebarUI.title = title;

  // Tell the Web Panels sidebar to load the bookmark.
  if (SidebarUI.browser.docShell && SidebarUI.browser.contentDocument &&
      SidebarUI.browser.contentDocument.getElementById("web-panels-browser")) {
    SidebarUI.browser.contentWindow.loadWebPanel(uri);
    if (gWebPanelURI) {
      gWebPanelURI = "";
      SidebarUI.browser.removeEventListener("load", asyncOpenWebPanel, true);
    }
  } else {
    // The panel is still being constructed.  Attach an onload handler.
    if (!gWebPanelURI) {
      SidebarUI.browser.addEventListener("load", asyncOpenWebPanel, true);
    }
    gWebPanelURI = uri;
  }
}

function asyncOpenWebPanel(event) {
  if (gWebPanelURI && SidebarUI.browser.contentDocument &&
      SidebarUI.browser.contentDocument.getElementById("web-panels-browser")) {
    SidebarUI.browser.contentWindow.loadWebPanel(gWebPanelURI);
  }
  gWebPanelURI = "";
  SidebarUI.browser.removeEventListener("load", asyncOpenWebPanel, true);
}

/*
 * - [ Dependencies ] ---------------------------------------------------------
 *  utilityOverlay.js:
 *    - gatherTextUnder
 */

/**
 * Extracts linkNode and href for the current click target.
 *
 * @param event
 *        The click event.
 * @return [href, linkNode].
 *
 * @note linkNode will be null if the click wasn't on an anchor
 *       element (or XLink).
 */
function hrefAndLinkNodeForClickEvent(event) {
  function isHTMLLink(aNode) {
    // Be consistent with what nsContextMenu.js does.
    return ((aNode instanceof HTMLAnchorElement && aNode.href) ||
            (aNode instanceof HTMLAreaElement && aNode.href) ||
            aNode instanceof HTMLLinkElement);
  }

  let node = event.target;
  while (node && !isHTMLLink(node)) {
    node = node.parentNode;
  }

  if (node)
    return [node.href, node];

  // If there is no linkNode, try simple XLink.
  let href, baseURI;
  node = event.target;
  while (node && !href) {
    if (node.nodeType == Node.ELEMENT_NODE &&
        (node.localName == "a" ||
         node.namespaceURI == "http://www.w3.org/1998/Math/MathML")) {
      href = node.getAttribute("href") ||
             node.getAttributeNS("http://www.w3.org/1999/xlink", "href");

      if (href) {
        baseURI = node.baseURI;
        break;
      }
    }
    node = node.parentNode;
  }

  // In case of XLink, we don't return the node we got href from since
  // callers expect <a>-like elements.
  return [href ? makeURLAbsolute(baseURI, href) : null, null];
}

/**
 * Called whenever the user clicks in the content area.
 *
 * @param event
 *        The click event.
 * @param isPanelClick
 *        Whether the event comes from a web panel.
 * @note default event is prevented if the click is handled.
 */
function contentAreaClick(event, isPanelClick) {
  if (!event.isTrusted || event.defaultPrevented || event.button == 2)
    return;

  let [href, linkNode] = hrefAndLinkNodeForClickEvent(event);
  if (!href) {
    // Not a link, handle middle mouse navigation.
    if (event.button == 1 &&
        gPrefService.getBoolPref("middlemouse.contentLoadURL") &&
        !gPrefService.getBoolPref("general.autoScroll")) {
      middleMousePaste(event);
      event.preventDefault();
    }
    return;
  }

  // This code only applies if we have a linkNode (i.e. clicks on real anchor
  // elements, as opposed to XLink).
  if (linkNode && event.button == 0 &&
      !event.ctrlKey && !event.shiftKey && !event.altKey && !event.metaKey) {
    // A Web panel's links should target the main content area.  Do this
    // if no modifier keys are down and if there's no target or the target
    // equals _main (the IE convention) or _content (the Mozilla convention).
    let target = linkNode.target;
    let mainTarget = !target || target == "_content" || target == "_main";
    if (isPanelClick && mainTarget) {
      // javascript and data links should be executed in the current browser.
      if (linkNode.getAttribute("onclick") ||
          href.startsWith("javascript:") ||
          href.startsWith("data:"))
        return;

      try {
        urlSecurityCheck(href, linkNode.ownerDocument.nodePrincipal);
      } catch (ex) {
        // Prevent loading unsecure destinations.
        event.preventDefault();
        return;
      }

      loadURI(href, null, null, false);
      event.preventDefault();
      return;
    }

    if (linkNode.getAttribute("rel") == "sidebar") {
      // This is the Opera convention for a special link that, when clicked,
      // allows to add a sidebar panel.  The link's title attribute contains
      // the title that should be used for the sidebar panel.
      PlacesUIUtils.showBookmarkDialog({ action: "add"
                                       , type: "bookmark"
                                       , uri: makeURI(href)
                                       , title: linkNode.getAttribute("title")
                                       , loadBookmarkInSidebar: true
                                       , hiddenRows: [ "description"
                                                     , "location"
                                                     , "keyword" ]
                                       }, window);
      event.preventDefault();
      return;
    }
  }

  handleLinkClick(event, href, linkNode);

  // Mark the page as a user followed link.  This is done so that history can
  // distinguish automatic embed visits from user activated ones.  For example
  // pages loaded in frames are embed visits and lost with the session, while
  // visits across frames should be preserved.
  try {
    if (!PrivateBrowsingUtils.isWindowPrivate(window))
      PlacesUIUtils.markPageAsFollowedLink(href);
  } catch (ex) { /* Skip invalid URIs. */ }
}

/**
 * Handles clicks on links.
 *
 * @return true if the click event was handled, false otherwise.
 */
function handleLinkClick(event, href, linkNode) {
  if (event.button == 2) // right click
    return false;

  var where = whereToOpenLink(event);
  if (where == "current")
    return false;

  var doc = event.target.ownerDocument;

  if (where == "save") {
    saveURL(href, linkNode ? gatherTextUnder(linkNode) : "", null, true,
            true, doc.documentURIObject, doc);
    event.preventDefault();
    return true;
  }

  var referrerURI = doc.documentURIObject;
  // if the mixedContentChannel is present and the referring URI passes
  // a same origin check with the target URI, we can preserve the users
  // decision of disabling MCB on a page for it's child tabs.
  var persistAllowMixedContentInChildTab = false;

  if (where == "tab" && gBrowser.docShell.mixedContentChannel) {
    const sm = Services.scriptSecurityManager;
    try {
      var targetURI = makeURI(href);
      sm.checkSameOriginURI(referrerURI, targetURI, false);
      persistAllowMixedContentInChildTab = true;
    } catch (e) { }
  }

  // first get document wide referrer policy, then
  // get referrer attribute from clicked link and parse it and
  // allow per element referrer to overrule the document wide referrer if enabled
  let referrerPolicy = doc.referrerPolicy;
  if (Services.prefs.getBoolPref("network.http.enablePerElementReferrer") &&
      linkNode) {
    let referrerAttrValue = Services.netUtils.parseAttributePolicyString(linkNode.
                            getAttribute("referrerpolicy"));
    if (referrerAttrValue != Ci.nsIHttpChannel.REFERRER_POLICY_UNSET) {
      referrerPolicy = referrerAttrValue;
    }
  }

  urlSecurityCheck(href, doc.nodePrincipal);
  let params = {
    charset: doc.characterSet,
    allowMixedContent: persistAllowMixedContentInChildTab,
    referrerURI,
    referrerPolicy,
    noReferrer: BrowserUtils.linkHasNoReferrer(linkNode),
    originPrincipal: doc.nodePrincipal,
  };

  // The new tab/window must use the same userContextId
  if (doc.nodePrincipal.originAttributes.userContextId) {
    params.userContextId = doc.nodePrincipal.originAttributes.userContextId;
  }

  openLinkIn(href, where, params);
  event.preventDefault();
  return true;
}

function middleMousePaste(event) {
  let clipboard = readFromClipboard();
  if (!clipboard)
    return;

  // Strip embedded newlines and surrounding whitespace, to match the URL
  // bar's behavior (stripsurroundingwhitespace)
  clipboard = clipboard.replace(/\s*\n\s*/g, "");

  clipboard = stripUnsafeProtocolOnPaste(clipboard);

  // if it's not the current tab, we don't need to do anything because the
  // browser doesn't exist.
  let where = whereToOpenLink(event, true, false);
  let lastLocationChange;
  if (where == "current") {
    lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;
  }

  getShortcutOrURIAndPostData(clipboard).then(data => {
    try {
      makeURI(data.url);
    } catch (ex) {
      // Not a valid URI.
      return;
    }

    try {
      addToUrlbarHistory(data.url);
    } catch (ex) {
      // Things may go wrong when adding url to session history,
      // but don't let that interfere with the loading of the url.
      Cu.reportError(ex);
    }

    if (where != "current" ||
        lastLocationChange == gBrowser.selectedBrowser.lastLocationChange) {
      openUILink(data.url, event,
                 { ignoreButton: true,
                   disallowInheritPrincipal: !data.mayInheritPrincipal });
    }
  });

  event.stopPropagation();
}

function stripUnsafeProtocolOnPaste(pasteData) {
  // Don't allow pasting javascript URIs since we don't support
  // LOAD_FLAGS_DISALLOW_INHERIT_PRINCIPAL for those.
  let changed = false;
  let pasteDataNoJS = pasteData.replace(/\r?\n/g, "")
                               .replace(/^(?:\W*javascript:)+/i,
                                        () => {
                                                changed = true;
                                                return "";
                                              });
  return changed ? pasteDataNoJS : pasteData;
}

// handleDroppedLink has the following 2 overloads:
//   handleDroppedLink(event, url, name)
//   handleDroppedLink(event, links)
function handleDroppedLink(event, urlOrLinks, name) {
  let links;
  if (Array.isArray(urlOrLinks)) {
    links = urlOrLinks;
  } else {
    links = [{ url: urlOrLinks, name, type: "" }];
  }

  let lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;

  let userContextId = gBrowser.selectedBrowser.getAttribute("usercontextid");

  // event is null if links are dropped in content process.
  // inBackground should be false, as it's loading into current browser.
  let inBackground = false;
  if (event) {
    inBackground = Services.prefs.getBoolPref("browser.tabs.loadInBackground");
    if (event.shiftKey)
      inBackground = !inBackground;
  }

  Task.spawn(function*() {
    let urls = [];
    let postDatas = [];
    for (let link of links) {
      let data = yield getShortcutOrURIAndPostData(link.url);
      urls.push(data.url);
      postDatas.push(data.postData);
    }
    if (lastLocationChange == gBrowser.selectedBrowser.lastLocationChange) {
      gBrowser.loadTabs(urls, {
        inBackground,
        replace: true,
        allowThirdPartyFixup: false,
        postDatas,
        userContextId,
      });
    }
  });

  // If links are dropped in content process, event.preventDefault() should be
  // called in content process.
  if (event) {
    // Keep the event from being handled by the dragDrop listeners
    // built-in to goanna if they happen to be above us.
    event.preventDefault();
  }
}

function BrowserSetForcedCharacterSet(aCharset) {
  if (aCharset) {
    gBrowser.selectedBrowser.characterSet = aCharset;
    // Save the forced character-set
    if (!PrivateBrowsingUtils.isWindowPrivate(window))
      PlacesUtils.setCharsetForURI(getWebNavigation().currentURI, aCharset);
  }
  BrowserCharsetReload();
}

function BrowserCharsetReload() {
  BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_CHARSET_CHANGE);
}

function UpdateCurrentCharset(target) {
  let selectedCharset = CharsetMenu.foldCharset(gBrowser.selectedBrowser.characterSet);
  for (let menuItem of target.getElementsByTagName("menuitem")) {
    let isSelected = menuItem.getAttribute("charset") === selectedCharset;
    menuItem.setAttribute("checked", isSelected);
  }
}

var gPageStyleMenu = {
  // This maps from a <browser> element (or, more specifically, a
  // browser's permanentKey) to an Object that contains the most recent
  // information about the browser content's stylesheets. That Object
  // is populated via the PageStyle:StyleSheets message from the content
  // process. The Object should have the following structure:
  //
  // filteredStyleSheets (Array):
  //   An Array of objects with a filtered list representing all stylesheets
  //   that the current page offers. Each object has the following members:
  //
  //   title (String):
  //     The title of the stylesheet
  //
  //   disabled (bool):
  //     Whether or not the stylesheet is currently applied
  //
  //   href (String):
  //     The URL of the stylesheet. Stylesheets loaded via a data URL will
  //     have this property set to null.
  //
  // authorStyleDisabled (bool):
  //   Whether or not the user currently has "No Style" selected for
  //   the current page.
  //
  // preferredStyleSheetSet (bool):
  //   Whether or not the user currently has the "Default" style selected
  //   for the current page.
  //
  _pageStyleSheets: new WeakMap(),

  init() {
    let mm = window.messageManager;
    mm.addMessageListener("PageStyle:StyleSheets", (msg) => {
      this._pageStyleSheets.set(msg.target.permanentKey, msg.data);
    });
  },

  /**
   * Returns an array of Objects representing stylesheets in a
   * browser. Note that the pageshow event needs to fire in content
   * before this information will be available.
   *
   * @param browser (optional)
   *        The <xul:browser> to search for stylesheets. If omitted, this
   *        defaults to the currently selected tab's browser.
   * @returns Array
   *        An Array of Objects representing stylesheets in the browser.
   *        See the documentation for gPageStyleMenu for a description
   *        of the Object structure.
   */
  getBrowserStyleSheets(browser) {
    if (!browser) {
      browser = gBrowser.selectedBrowser;
    }

    let data = this._pageStyleSheets.get(browser.permanentKey);
    if (!data) {
      return [];
    }
    return data.filteredStyleSheets;
  },

  _getStyleSheetInfo(browser) {
    let data = this._pageStyleSheets.get(browser.permanentKey);
    if (!data) {
      return {
        filteredStyleSheets: [],
        authorStyleDisabled: false,
        preferredStyleSheetSet: true
      };
    }

    return data;
  },

  fillPopup(menuPopup) {
    let styleSheetInfo = this._getStyleSheetInfo(gBrowser.selectedBrowser);
    var noStyle = menuPopup.firstChild;
    var persistentOnly = noStyle.nextSibling;
    var sep = persistentOnly.nextSibling;
    while (sep.nextSibling)
      menuPopup.removeChild(sep.nextSibling);

    let styleSheets = styleSheetInfo.filteredStyleSheets;
    var currentStyleSheets = {};
    var styleDisabled = styleSheetInfo.authorStyleDisabled;
    var haveAltSheets = false;
    var altStyleSelected = false;

    for (let currentStyleSheet of styleSheets) {
      if (!currentStyleSheet.disabled)
        altStyleSelected = true;

      haveAltSheets = true;

      let lastWithSameTitle = null;
      if (currentStyleSheet.title in currentStyleSheets)
        lastWithSameTitle = currentStyleSheets[currentStyleSheet.title];

      if (!lastWithSameTitle) {
        let menuItem = document.createElement("menuitem");
        menuItem.setAttribute("type", "radio");
        menuItem.setAttribute("label", currentStyleSheet.title);
        menuItem.setAttribute("data", currentStyleSheet.title);
        menuItem.setAttribute("checked", !currentStyleSheet.disabled && !styleDisabled);
        menuItem.setAttribute("oncommand", "gPageStyleMenu.switchStyleSheet(this.getAttribute('data'));");
        menuPopup.appendChild(menuItem);
        currentStyleSheets[currentStyleSheet.title] = menuItem;
      } else if (currentStyleSheet.disabled) {
        lastWithSameTitle.removeAttribute("checked");
      }
    }

    noStyle.setAttribute("checked", styleDisabled);
    persistentOnly.setAttribute("checked", !altStyleSelected && !styleDisabled);
    persistentOnly.hidden = styleSheetInfo.preferredStyleSheetSet ? haveAltSheets : false;
    sep.hidden = (noStyle.hidden && persistentOnly.hidden) || !haveAltSheets;
  },

  switchStyleSheet(title) {
    let mm = gBrowser.selectedBrowser.messageManager;
    mm.sendAsyncMessage("PageStyle:Switch", {title});
  },

  disableStyle() {
    let mm = gBrowser.selectedBrowser.messageManager;
    mm.sendAsyncMessage("PageStyle:Disable");
  },
};

/* Legacy global page-style functions */
var stylesheetFillPopup = gPageStyleMenu.fillPopup.bind(gPageStyleMenu);
function stylesheetSwitchAll(contentWindow, title) {
  // We ignore the contentWindow param. Add-ons don't appear to use
  // it, and it's difficult to support in e10s (where it will be a
  // CPOW).
  gPageStyleMenu.switchStyleSheet(title);
}
function setStyleDisabled(disabled) {
  if (disabled)
    gPageStyleMenu.disableStyle();
}


var LanguageDetectionListener = {
  init() {
    window.messageManager.addMessageListener("Translation:DocumentState", msg => {
      Translation.documentStateReceived(msg.target, msg.data);
    });
  }
};


var BrowserOffline = {
  _inited: false,

  // BrowserOffline Public Methods
  init() {
    if (!this._uiElement)
      this._uiElement = document.getElementById("workOfflineMenuitemState");

    Services.obs.addObserver(this, "network:offline-status-changed", false);

    this._updateOfflineUI(Services.io.offline);

    this._inited = true;
  },

  uninit() {
    if (this._inited) {
      Services.obs.removeObserver(this, "network:offline-status-changed");
    }
  },

  toggleOfflineStatus() {
    var ioService = Services.io;

    if (!ioService.offline && !this._canGoOffline()) {
      this._updateOfflineUI(false);
      return;
    }

    ioService.offline = !ioService.offline;
  },

  // nsIObserver
  observe(aSubject, aTopic, aState) {
    if (aTopic != "network:offline-status-changed")
      return;

    // This notification is also received because of a loss in connectivity,
    // which we ignore by updating the UI to the current value of io.offline
    this._updateOfflineUI(Services.io.offline);
  },

  // BrowserOffline Implementation Methods
  _canGoOffline() {
    try {
      var cancelGoOffline = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
      Services.obs.notifyObservers(cancelGoOffline, "offline-requested", null);

      // Something aborted the quit process.
      if (cancelGoOffline.data)
        return false;
    } catch (ex) {
    }

    return true;
  },

  _uiElement: null,
  _updateOfflineUI(aOffline) {
    var offlineLocked = gPrefService.prefIsLocked("network.online");
    if (offlineLocked)
      this._uiElement.setAttribute("disabled", "true");

    this._uiElement.setAttribute("checked", aOffline);
  }
};

var OfflineApps = {
  warnUsage(browser, uri) {
    if (!browser)
      return;

    let mainAction = {
      label: gNavigatorBundle.getString("offlineApps.manageUsage"),
      accessKey: gNavigatorBundle.getString("offlineApps.manageUsageAccessKey"),
      callback: this.manage
    };

    let warnQuotaKB = Services.prefs.getIntPref("offline-apps.quota.warn");
    // This message shows the quota in MB, and so we divide the quota (in kb) by 1024.
    let message = gNavigatorBundle.getFormattedString("offlineApps.usage",
                                                      [ uri.host,
                                                        warnQuotaKB / 1024 ]);

    let anchorID = "indexedDB-notification-icon";
    let options = {
      persistent: true,
      hideClose: true,
    };
    PopupNotifications.show(browser, "offline-app-usage", message,
                            anchorID, mainAction, null, options);

    // Now that we've warned once, prevent the warning from showing up
    // again.
    Services.perms.add(uri, "offline-app",
                       Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN);
  },

  // XXX: duplicated in preferences/advanced.js
  _getOfflineAppUsage(host, groups) {
    let cacheService = Cc["@mozilla.org/network/application-cache-service;1"].
                       getService(Ci.nsIApplicationCacheService);
    if (!groups) {
      try {
        groups = cacheService.getGroups();
      } catch (ex) {
        return 0;
      }
    }

    let usage = 0;
    for (let group of groups) {
      let uri = Services.io.newURI(group);
      if (uri.asciiHost == host) {
        let cache = cacheService.getActiveCache(group);
        usage += cache.usage;
      }
    }

    return usage;
  },

  _usedMoreThanWarnQuota(uri) {
    // if the user has already allowed excessive usage, don't bother checking
    if (Services.perms.testExactPermission(uri, "offline-app") !=
        Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN) {
      let usageBytes = this._getOfflineAppUsage(uri.asciiHost);
      let warnQuotaKB = Services.prefs.getIntPref("offline-apps.quota.warn");
      // The pref is in kb, the usage we get is in bytes, so multiply the quota
      // to compare correctly:
      if (usageBytes >= warnQuotaKB * 1024) {
        return true;
      }
    }

    return false;
  },

  requestPermission(browser, docId, uri) {
    let host = uri.asciiHost;
    let notificationID = "offline-app-requested-" + host;
    let notification = PopupNotifications.getNotification(notificationID, browser);

    if (notification) {
      notification.options.controlledItems.push([
        Cu.getWeakReference(browser), docId, uri
      ]);
    } else {
      let mainAction = {
        label: gNavigatorBundle.getString("offlineApps.allowStoring.label"),
        accessKey: gNavigatorBundle.getString("offlineApps.allowStoring.accesskey"),
        callback() {
          for (let [ciBrowser, ciDocId, ciUri] of notification.options.controlledItems) {
            OfflineApps.allowSite(ciBrowser, ciDocId, ciUri);
          }
        }
      };
      let secondaryActions = [{
        label: gNavigatorBundle.getString("offlineApps.dontAllow.label"),
        accessKey: gNavigatorBundle.getString("offlineApps.dontAllow.accesskey"),
        callback() {
          for (let [, , ciUri] of notification.options.controlledItems) {
            OfflineApps.disallowSite(ciUri);
          }
        }
      }];
      let message = gNavigatorBundle.getFormattedString("offlineApps.available2",
                                                        [host]);
      let anchorID = "indexedDB-notification-icon";
      let options = {
        persistent: true,
        hideClose: true,
        controlledItems : [[Cu.getWeakReference(browser), docId, uri]]
      };
      notification = PopupNotifications.show(browser, notificationID, message,
                                             anchorID, mainAction,
                                             secondaryActions, options);
    }
  },

  disallowSite(uri) {
    Services.perms.add(uri, "offline-app", Services.perms.DENY_ACTION);
  },

  allowSite(browserRef, docId, uri) {
    Services.perms.add(uri, "offline-app", Services.perms.ALLOW_ACTION);

    // When a site is enabled while loading, manifest resources will
    // start fetching immediately.  This one time we need to do it
    // ourselves.
    let browser = browserRef.get();
    if (browser && browser.messageManager) {
      browser.messageManager.sendAsyncMessage("OfflineApps:StartFetching", {
        docId,
      });
    }
  },

  manage() {
    openAdvancedPreferences("networkTab");
  },

  receiveMessage(msg) {
    switch (msg.name) {
      case "OfflineApps:CheckUsage":
        let uri = makeURI(msg.data.uri);
        if (this._usedMoreThanWarnQuota(uri)) {
          this.warnUsage(msg.target, uri);
        }
        break;
      case "OfflineApps:RequestPermission":
        this.requestPermission(msg.target, msg.data.docId, makeURI(msg.data.uri));
        break;
    }
  },

  init() {
    let mm = window.messageManager;
    mm.addMessageListener("OfflineApps:CheckUsage", this);
    mm.addMessageListener("OfflineApps:RequestPermission", this);
  },
};

var IndexedDBPromptHelper = {
  _permissionsPrompt: "indexedDB-permissions-prompt",
  _permissionsResponse: "indexedDB-permissions-response",

  _notificationIcon: "indexedDB-notification-icon",

  init:
  function IndexedDBPromptHelper_init() {
    Services.obs.addObserver(this, this._permissionsPrompt, false);
  },

  uninit:
  function IndexedDBPromptHelper_uninit() {
    Services.obs.removeObserver(this, this._permissionsPrompt);
  },

  observe:
  function IndexedDBPromptHelper_observe(subject, topic, data) {
    if (topic != this._permissionsPrompt) {
      throw new Error("Unexpected topic!");
    }

    var requestor = subject.QueryInterface(Ci.nsIInterfaceRequestor);

    var browser = requestor.getInterface(Ci.nsIDOMNode);
    if (browser.ownerGlobal != window) {
      // Only listen for notifications for browsers in our chrome window.
      return;
    }

    // Get the host name if available or the file path otherwise.
    var host = browser.currentURI.asciiHost || browser.currentURI.path;

    var message;
    var responseTopic;
    if (topic == this._permissionsPrompt) {
      message = gNavigatorBundle.getFormattedString("offlineApps.available2",
                                                    [ host ]);
      responseTopic = this._permissionsResponse;
    }

    var observer = requestor.getInterface(Ci.nsIObserver);

    var mainAction = {
      label: gNavigatorBundle.getString("offlineApps.allowStoring.label"),
      accessKey: gNavigatorBundle.getString("offlineApps.allowStoring.accesskey"),
      callback() {
        observer.observe(null, responseTopic,
                         Ci.nsIPermissionManager.ALLOW_ACTION);
      }
    };

    var secondaryActions = [
      {
        label: gNavigatorBundle.getString("offlineApps.dontAllow.label"),
        accessKey: gNavigatorBundle.getString("offlineApps.dontAllow.accesskey"),
        callback() {
          observer.observe(null, responseTopic,
                           Ci.nsIPermissionManager.DENY_ACTION);
        }
      }
    ];

    PopupNotifications.show(
      browser, topic, message, this._notificationIcon, mainAction, secondaryActions,
      {
        persistent: true,
        hideClose: !Services.prefs.getBoolPref("privacy.permissionPrompts.showCloseButton"),
      });
  }
};

function CanCloseWindow() {
  // Avoid redundant calls to canClose from showing multiple
  // PermitUnload dialogs.
  if (Services.startup.shuttingDown || window.skipNextCanClose) {
    return true;
  }

  for (let browser of gBrowser.browsers) {
    let {permitUnload, timedOut} = browser.permitUnload();
    if (timedOut) {
      return true;
    }
    if (!permitUnload) {
      return false;
    }
  }
  return true;
}

function WindowIsClosing() {
  if (!closeWindow(false, warnAboutClosingWindow))
    return false;

  // In theory we should exit here and the Window's internal Close
  // method should trigger canClose on nsBrowserAccess. However, by
  // that point it's too late to be able to show a prompt for
  // PermitUnload. So we do it here, when we still can.
  if (CanCloseWindow()) {
    // This flag ensures that the later canClose call does nothing.
    // It's only needed to make tests pass, since they detect the
    // prompt even when it's not actually shown.
    window.skipNextCanClose = true;
    return true;
  }

  return false;
}

/**
 * Checks if this is the last full *browser* window around. If it is, this will
 * be communicated like quitting. Otherwise, we warn about closing multiple tabs.
 * @returns true if closing can proceed, false if it got cancelled.
 */
function warnAboutClosingWindow() {
  // Popups aren't considered full browser windows; we also ignore private windows.
  let isPBWindow = PrivateBrowsingUtils.isWindowPrivate(window) &&
        !PrivateBrowsingUtils.permanentPrivateBrowsing;
  if (!isPBWindow && !toolbar.visible)
    return gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);

  // Figure out if there's at least one other browser window around.
  let otherPBWindowExists = false;
  let nonPopupPresent = false;
  for (let win of browserWindows()) {
    if (!win.closed && win != window) {
      if (isPBWindow && PrivateBrowsingUtils.isWindowPrivate(win))
        otherPBWindowExists = true;
      if (win.toolbar.visible)
        nonPopupPresent = true;
      // If the current window is not in private browsing mode we don't need to
      // look for other pb windows, we can leave the loop when finding the
      // first non-popup window. If however the current window is in private
      // browsing mode then we need at least one other pb and one non-popup
      // window to break out early.
      if ((!isPBWindow || otherPBWindowExists) && nonPopupPresent)
        break;
    }
  }

  if (isPBWindow && !otherPBWindowExists) {
    let exitingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
                          createInstance(Ci.nsISupportsPRBool);
    exitingCanceled.data = false;
    Services.obs.notifyObservers(exitingCanceled,
                                 "last-pb-context-exiting",
                                 null);
    if (exitingCanceled.data)
      return false;
  }

  if (nonPopupPresent) {
    return isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
  }

  let os = Services.obs;

  let closingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
                        createInstance(Ci.nsISupportsPRBool);
  os.notifyObservers(closingCanceled,
                     "browser-lastwindow-close-requested", null);
  if (closingCanceled.data)
    return false;

  os.notifyObservers(null, "browser-lastwindow-close-granted", null);

#ifdef XP_MACOSX
  // OS X doesn't quit the application when the last window is closed, but keeps
   // the session alive. Hence don't prompt users to save tabs, but warn about
   // closing multiple tabs.
  return (isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL));
#else
  return true;
#endif
}

var MailIntegration = {
  sendLinkForBrowser(aBrowser) {
    this.sendMessage(aBrowser.currentURI.spec, aBrowser.contentTitle);
  },

  sendMessage(aBody, aSubject) {
    // generate a mailto url based on the url and the url's title
    var mailtoUrl = "mailto:";
    if (aBody) {
      mailtoUrl += "?body=" + encodeURIComponent(aBody);
      mailtoUrl += "&subject=" + encodeURIComponent(aSubject);
    }

    var uri = makeURI(mailtoUrl);

    // now pass this uri to the operating system
    this._launchExternalUrl(uri);
  },

  // a generic method which can be used to pass arbitrary urls to the operating
  // system.
  // aURL --> a nsIURI which represents the url to launch
  _launchExternalUrl(aURL) {
    var extProtocolSvc =
       Cc["@mozilla.org/uriloader/external-protocol-service;1"]
         .getService(Ci.nsIExternalProtocolService);
    if (extProtocolSvc)
      extProtocolSvc.loadUrl(aURL);
  }
};

function BrowserOpenAddonsMgr(aView) {
  return new Promise(resolve => {
    if (aView) {
      let emWindow;
      let browserWindow;

      var receivePong = function(aSubject, aTopic, aData) {
        let browserWin = aSubject.QueryInterface(Ci.nsIInterfaceRequestor)
                                 .getInterface(Ci.nsIWebNavigation)
                                 .QueryInterface(Ci.nsIDocShellTreeItem)
                                 .rootTreeItem
                                 .QueryInterface(Ci.nsIInterfaceRequestor)
                                 .getInterface(Ci.nsIDOMWindow);
        if (!emWindow || browserWin == window /* favor the current window */) {
          emWindow = aSubject;
          browserWindow = browserWin;
        }
      }
      Services.obs.addObserver(receivePong, "EM-pong", false);
      Services.obs.notifyObservers(null, "EM-ping", "");
      Services.obs.removeObserver(receivePong, "EM-pong");

      if (emWindow) {
        emWindow.loadView(aView);
        browserWindow.gBrowser.selectedTab =
          browserWindow.gBrowser._getTabForContentWindow(emWindow);
        emWindow.focus();
        resolve(emWindow);
        return;
      }
    }

    switchToTabHavingURI("about:addons", true);

    if (aView) {
      // This must be a new load, else the ping/pong would have
      // found the window above.
      Services.obs.addObserver(function observer(aSubject, aTopic, aData) {
        Services.obs.removeObserver(observer, aTopic);
        aSubject.loadView(aView);
        resolve(aSubject);
      }, "EM-loaded", false);
    } else {
      resolve();
    }
  });
}

function AddKeywordForSearchField() {
  let mm = gBrowser.selectedBrowser.messageManager;

  let onMessage = (message) => {
    mm.removeMessageListener("ContextMenu:SearchFieldBookmarkData:Result", onMessage);

    let bookmarkData = message.data;
    let title = gNavigatorBundle.getFormattedString("addKeywordTitleAutoFill",
                                                    [bookmarkData.title]);
    PlacesUIUtils.showBookmarkDialog({ action: "add"
                                     , type: "bookmark"
                                     , uri: makeURI(bookmarkData.spec)
                                     , title
                                     , description: bookmarkData.description
                                     , keyword: ""
                                     , postData: bookmarkData.postData
                                     , charSet: bookmarkData.charset
                                     , hiddenRows: [ "location"
                                                   , "description"
                                                   , "tags"
                                                   , "loadInSidebar" ]
                                     }, window);
  }
  mm.addMessageListener("ContextMenu:SearchFieldBookmarkData:Result", onMessage);

  mm.sendAsyncMessage("ContextMenu:SearchFieldBookmarkData", {}, { target: gContextMenu.target });
}

/**
 * Re-open a closed tab.
 * @param aIndex
 *        The index of the tab (via SessionStore.getClosedTabData)
 * @returns a reference to the reopened tab.
 */
function undoCloseTab(aIndex) {
  // wallpaper patch to prevent an unnecessary blank tab (bug 343895)
  var blankTabToRemove = null;
  if (gBrowser.tabs.length == 1 && isTabEmpty(gBrowser.selectedTab))
    blankTabToRemove = gBrowser.selectedTab;

  var tab = null;
  if (SessionStore.getClosedTabCount(window) > (aIndex || 0)) {
    tab = SessionStore.undoCloseTab(window, aIndex || 0);

    if (blankTabToRemove)
      gBrowser.removeTab(blankTabToRemove);
  }

  return tab;
}

/**
 * Re-open a closed window.
 * @param aIndex
 *        The index of the window (via SessionStore.getClosedWindowData)
 * @returns a reference to the reopened window.
 */
function undoCloseWindow(aIndex) {
  let window = null;
  if (SessionStore.getClosedWindowCount() > (aIndex || 0))
    window = SessionStore.undoCloseWindow(aIndex || 0);

  return window;
}

/*
 * Determines if a tab is "empty", usually used in the context of determining
 * if it's ok to close the tab.
 */
function isTabEmpty(aTab) {
  if (aTab.hasAttribute("busy"))
    return false;

  if (aTab.hasAttribute("customizemode"))
    return false;

  let browser = aTab.linkedBrowser;
  if (!isBlankPageURL(browser.currentURI.spec))
    return false;

  if (!checkEmptyPageOrigin(browser))
    return false;

  if (browser.canGoForward || browser.canGoBack)
    return false;

  return true;
}

/**
 * Check whether a page can be considered as 'empty', that its URI
 * reflects its origin, and that if it's loaded in a tab, that tab
 * could be considered 'empty' (e.g. like the result of opening
 * a 'blank' new tab).
 *
 * We have to do more than just check the URI, because especially
 * for things like about:blank, it is possible that the opener or
 * some other page has control over the contents of the page.
 *
 * @param browser {Browser}
 *        The browser whose page we're checking (the selected browser
 *        in this window if omitted).
 * @param uri {nsIURI}
 *        The URI against which we're checking (the browser's currentURI
 *        if omitted).
 *
 * @return false if the page was opened by or is controlled by arbitrary web
 *         content, unless that content corresponds with the URI.
 *         true if the page is blank and controlled by a principal matching
 *         that URI (or the system principal if the principal has no URI)
 */
function checkEmptyPageOrigin(browser = gBrowser.selectedBrowser,
                              uri = browser.currentURI) {
  // If another page opened this page with e.g. window.open, this page might
  // be controlled by its opener - return false.
  if (browser.hasContentOpener) {
    return false;
  }
  let contentPrincipal = browser.contentPrincipal;
  // Not all principals have URIs...
  if (contentPrincipal.URI) {
    // There are two specialcases involving about:blank. One is where
    // the user has manually loaded it and it got created with a null
    // principal. The other involves the case where we load
    // some other empty page in a browser and the current page is the
    // initial about:blank page (which has that as its principal, not
    // just URI in which case it could be web-based). Especially in
    // e10s, we need to tackle that case specifically to avoid race
    // conditions when updating the URL bar.
    if ((uri.spec == "about:blank" && contentPrincipal.isNullPrincipal) ||
        contentPrincipal.URI.spec == "about:blank") {
      return true;
    }
    return contentPrincipal.URI.equals(uri);
  }
  // ... so for those that don't have them, enforce that the page has the
  // system principal (this matches e.g. on about:newtab).
  let ssm = Services.scriptSecurityManager;
  return ssm.isSystemPrincipal(contentPrincipal);
}

function BrowserOpenSyncTabs() {
  gSyncUI.openSyncedTabsPanel();
}

/**
 * Format a URL
 * eg:
 * echo formatURL("https://addons.mozilla.org/%LOCALE%/%APP%/%VERSION%/");
 * > https://addons.mozilla.org/en-US/firefox/3.0a1/
 *
 * Currently supported built-ins are LOCALE, APP, and any value from nsIXULAppInfo, uppercased.
 */
function formatURL(aFormat, aIsPref) {
  var formatter = Cc["@mozilla.org/toolkit/URLFormatterService;1"].getService(Ci.nsIURLFormatter);
  return aIsPref ? formatter.formatURLPref(aFormat) : formatter.formatURL(aFormat);
}

/**
 * Utility object to handle manipulations of the identity indicators in the UI
 */
var gIdentityHandler = {
  /**
   * nsIURI for which the identity UI is displayed. This has been already
   * processed by nsIURIFixup.createExposableURI.
   */
  _uri: null,

  /**
   * We only know the connection type if this._uri has a defined "host" part.
   *
   * These URIs, like "about:" and "data:" URIs, will usually be treated as a
   * non-secure connection, unless they refer to an internally implemented
   * browser page or resolve to "file:" URIs.
   */
  _uriHasHost: false,

  /**
   * Whether this._uri refers to an internally implemented browser page.
   *
   * Note that this is set for some "about:" pages, but general "chrome:" URIs
   * are not included in this category by default.
   */
  _isSecureInternalUI: false,

  /**
   * nsISSLStatus metadata provided by gBrowser.securityUI the last time the
   * identity UI was updated, or null if the connection is not secure.
   */
  _sslStatus: null,

  /**
   * Bitmask provided by nsIWebProgressListener.onSecurityChange.
   */
  _state: 0,

  /**
   * This flag gets set if the identity popup was opened by a keypress,
   * to be able to focus it on the popupshown event.
   */
  _popupTriggeredByKeyboard: false,

  get _isBroken() {
    return this._state & Ci.nsIWebProgressListener.STATE_IS_BROKEN;
  },

  get _isSecure() {
    // If a <browser> is included within a chrome document, then this._state
    // will refer to the security state for the <browser> and not the top level
    // document. In this case, don't upgrade the security state in the UI
    // with the secure state of the embedded <browser>.
    return !this._isURILoadedFromFile && this._state & Ci.nsIWebProgressListener.STATE_IS_SECURE;
  },

  get _isEV() {
    // If a <browser> is included within a chrome document, then this._state
    // will refer to the security state for the <browser> and not the top level
    // document. In this case, don't upgrade the security state in the UI
    // with the EV state of the embedded <browser>.
    return !this._isURILoadedFromFile && this._state & Ci.nsIWebProgressListener.STATE_IDENTITY_EV_TOPLEVEL;
  },

  get _isMixedActiveContentLoaded() {
    return this._state & Ci.nsIWebProgressListener.STATE_LOADED_MIXED_ACTIVE_CONTENT;
  },

  get _isMixedActiveContentBlocked() {
    return this._state & Ci.nsIWebProgressListener.STATE_BLOCKED_MIXED_ACTIVE_CONTENT;
  },

  get _isMixedPassiveContentLoaded() {
    return this._state & Ci.nsIWebProgressListener.STATE_LOADED_MIXED_DISPLAY_CONTENT;
  },

  get _isCertUserOverridden() {
    return this._state & Ci.nsIWebProgressListener.STATE_CERT_USER_OVERRIDDEN;
  },

  get _hasInsecureLoginForms() {
    // checks if the page has been flagged for an insecure login. Also checks
    // if the pref to degrade the UI is set to true
    return LoginManagerParent.hasInsecureLoginForms(gBrowser.selectedBrowser) &&
           Services.prefs.getBoolPref("security.insecure_password.ui.enabled");
  },

  // smart getters
  get _identityPopup() {
    delete this._identityPopup;
    return this._identityPopup = document.getElementById("identity-popup");
  },
  get _identityBox() {
    delete this._identityBox;
    return this._identityBox = document.getElementById("identity-box");
  },
  get _identityPopupMultiView() {
    delete this._identityPopupMultiView;
    return this._identityPopupMultiView = document.getElementById("identity-popup-multiView");
  },
  get _identityPopupContentHosts() {
    delete this._identityPopupContentHosts;
    let selector = ".identity-popup-host";
    return this._identityPopupContentHosts = [
      ...this._identityPopupMultiView._mainView.querySelectorAll(selector),
      ...document.querySelectorAll(selector)
    ];
  },
  get _identityPopupContentHostless() {
    delete this._identityPopupContentHostless;
    let selector = ".identity-popup-hostless";
    return this._identityPopupContentHostless = [
      ...this._identityPopupMultiView._mainView.querySelectorAll(selector),
      ...document.querySelectorAll(selector)
    ];
  },
  get _identityPopupContentOwner() {
    delete this._identityPopupContentOwner;
    return this._identityPopupContentOwner =
      document.getElementById("identity-popup-content-owner");
  },
  get _identityPopupContentSupp() {
    delete this._identityPopupContentSupp;
    return this._identityPopupContentSupp =
      document.getElementById("identity-popup-content-supplemental");
  },
  get _identityPopupContentVerif() {
    delete this._identityPopupContentVerif;
    return this._identityPopupContentVerif =
      document.getElementById("identity-popup-content-verifier");
  },
  get _identityPopupMixedContentLearnMore() {
    delete this._identityPopupMixedContentLearnMore;
    return this._identityPopupMixedContentLearnMore =
      document.getElementById("identity-popup-mcb-learn-more");
  },
  get _identityPopupInsecureLoginFormsLearnMore() {
    delete this._identityPopupInsecureLoginFormsLearnMore;
    return this._identityPopupInsecureLoginFormsLearnMore =
      document.getElementById("identity-popup-insecure-login-forms-learn-more");
  },
  get _identityIconLabels() {
    delete this._identityIconLabels;
    return this._identityIconLabels = document.getElementById("identity-icon-labels");
  },
  get _identityIconLabel() {
    delete this._identityIconLabel;
    return this._identityIconLabel = document.getElementById("identity-icon-label");
  },
  get _connectionIcon() {
    delete this._connectionIcon;
    return this._connectionIcon = document.getElementById("connection-icon");
  },
  get _overrideService() {
    delete this._overrideService;
    return this._overrideService = Cc["@mozilla.org/security/certoverride;1"]
                                     .getService(Ci.nsICertOverrideService);
  },
  get _identityIconCountryLabel() {
    delete this._identityIconCountryLabel;
    return this._identityIconCountryLabel = document.getElementById("identity-icon-country-label");
  },
  get _identityIcon() {
    delete this._identityIcon;
    return this._identityIcon = document.getElementById("identity-icon");
  },
  get _permissionList() {
    delete this._permissionList;
    return this._permissionList = document.getElementById("identity-popup-permission-list");
  },
  get _permissionEmptyHint() {
    delete this._permissionEmptyHint;
    return this._permissionEmptyHint = document.getElementById("identity-popup-permission-empty-hint");
  },
  get _permissionReloadHint() {
    delete this._permissionReloadHint;
    return this._permissionReloadHint = document.getElementById("identity-popup-permission-reload-hint");
  },
  get _permissionAnchors() {
    delete this._permissionAnchors;
    let permissionAnchors = {};
    for (let anchor of document.getElementById("blocked-permissions-container").children) {
      permissionAnchors[anchor.getAttribute("data-permission-id")] = anchor;
    }
    return this._permissionAnchors = permissionAnchors;
  },

  /**
   * Handler for mouseclicks on the "More Information" button in the
   * "identity-popup" panel.
   */
  handleMoreInfoClick(event) {
    displaySecurityInfo();
    event.stopPropagation();
    this._identityPopup.hidePopup();
  },

  toggleSubView(name, anchor) {
    let view = this._identityPopupMultiView;
    if (view.showingSubView) {
      view.showMainView();
    } else {
      view.showSubView(`identity-popup-${name}View`, anchor);
    }

    // If an element is focused that's not the anchor, clear the focus.
    // Elements of hidden views have -moz-user-focus:ignore but setting that
    // per CSS selector doesn't blur a focused element in those hidden views.
    if (Services.focus.focusedElement != anchor) {
      Services.focus.clearFocus(window);
    }
  },

  disableMixedContentProtection() {
    // Use telemetry to measure how often unblocking happens
    const kMIXED_CONTENT_UNBLOCK_EVENT = 2;
    let histogram =
      Services.telemetry.getHistogramById(
        "MIXED_CONTENT_UNBLOCK_COUNTER");
    histogram.add(kMIXED_CONTENT_UNBLOCK_EVENT);
    // Reload the page with the content unblocked
    BrowserReloadWithFlags(
      Ci.nsIWebNavigation.LOAD_FLAGS_ALLOW_MIXED_CONTENT);
    this._identityPopup.hidePopup();
  },

  enableMixedContentProtection() {
    gBrowser.selectedBrowser.messageManager.sendAsyncMessage(
      "MixedContent:ReenableProtection", {});
    BrowserReload();
    this._identityPopup.hidePopup();
  },

  removeCertException() {
    if (!this._uriHasHost) {
      Cu.reportError("Trying to revoke a cert exception on a URI without a host?");
      return;
    }
    let host = this._uri.host;
    let port = this._uri.port > 0 ? this._uri.port : 443;
    this._overrideService.clearValidityOverride(host, port);
    BrowserReloadSkipCache();
    this._identityPopup.hidePopup();
  },

  /**
   * Helper to parse out the important parts of _sslStatus (of the SSL cert in
   * particular) for use in constructing identity UI strings
  */
  getIdentityData() {
    var result = {};
    var cert = this._sslStatus.serverCert;

    // Human readable name of Subject
    result.subjectOrg = cert.organization;

    // SubjectName fields, broken up for individual access
    if (cert.subjectName) {
      result.subjectNameFields = {};
      cert.subjectName.split(",").forEach(function(v) {
        var field = v.split("=");
        this[field[0]] = field[1];
      }, result.subjectNameFields);

      // Call out city, state, and country specifically
      result.city = result.subjectNameFields.L;
      result.state = result.subjectNameFields.ST;
      result.country = result.subjectNameFields.C;
    }

    // Human readable name of Certificate Authority
    result.caOrg =  cert.issuerOrganization || cert.issuerCommonName;
    result.cert = cert;

    return result;
  },

  /**
   * Update the identity user interface for the page currently being displayed.
   *
   * This examines the SSL certificate metadata, if available, as well as the
   * connection type and other security-related state information for the page.
   *
   * @param state
   *        Bitmask provided by nsIWebProgressListener.onSecurityChange.
   * @param uri
   *        nsIURI for which the identity UI should be displayed, already
   *        processed by nsIURIFixup.createExposableURI.
   */
  updateIdentity(state, uri) {
    let shouldHidePopup = this._uri && (this._uri.spec != uri.spec);
    this._state = state;

    // Firstly, populate the state properties required to display the UI. See
    // the documentation of the individual properties for details.
    this.setURI(uri);
    this._sslStatus = gBrowser.securityUI
                              .QueryInterface(Ci.nsISSLStatusProvider)
                              .SSLStatus;
    if (this._sslStatus) {
      this._sslStatus.QueryInterface(Ci.nsISSLStatus);
    }

    // Then, update the user interface with the available data.
    this.refreshIdentityBlock();
    // Handle a location change while the Control Center is focused
    // by closing the popup (bug 1207542)
    if (shouldHidePopup) {
      this._identityPopup.hidePopup();
    }
    this.showWeakCryptoInfoBar();

    // NOTE: We do NOT update the identity popup (the control center) when
    // we receive a new security state on the existing page (i.e. from a
    // subframe). If the user opened the popup and looks at the provided
    // information we don't want to suddenly change the panel contents.
  },

  /**
   * This is called asynchronously when requested by the Logins module, after
   * the insecure login forms state for the page has been updated.
   */
  refreshForInsecureLoginForms() {
    // Check this._uri because we don't want to refresh the user interface if
    // this is called before the first page load in the window for any reason.
    if (!this._uri) {
      Cu.reportError("Unexpected early call to refreshForInsecureLoginForms.");
      return;
    }
    this.refreshIdentityBlock();
  },

  updateSharingIndicator() {
    let tab = gBrowser.selectedTab;
    let sharing = tab.getAttribute("sharing");
    if (sharing)
      this._identityBox.setAttribute("sharing", sharing);
    else
      this._identityBox.removeAttribute("sharing");

    this._sharingState = tab._sharingState;

    if (this._identityPopup.state == "open") {
      this._handleHeightChange(() => this.updateSitePermissions());
    }
  },

  /**
   * Attempt to provide proper IDN treatment for host names
   */
  getEffectiveHost() {
    if (!this._IDNService)
      this._IDNService = Cc["@mozilla.org/network/idn-service;1"]
                         .getService(Ci.nsIIDNService);
    try {
      return this._IDNService.convertToDisplayIDN(this._uri.host, {});
    } catch (e) {
      // If something goes wrong (e.g. host is an IP address) just fail back
      // to the full domain.
      return this._uri.host;
    }
  },

  /**
   * Return the CSS class name to set on the "fullscreen-warning" element to
   * display information about connection security in the notification shown
   * when a site enters the fullscreen mode.
   */
  get pointerlockFsWarningClassName() {
    // Note that the fullscreen warning does not handle _isSecureInternalUI.
    if (this._uriHasHost && this._isEV) {
      return "verifiedIdentity";
    }
    if (this._uriHasHost && this._isSecure) {
      return "verifiedDomain";
    }
    return "unknownIdentity";
  },

  /**
   * Updates the identity block user interface with the data from this object.
   */
  refreshIdentityBlock() {
    if (!this._identityBox) {
      return;
    }

    let icon_label = "";
    let tooltip = "";
    let icon_country_label = "";
    let icon_labels_dir = "ltr";

    if (this._isSecureInternalUI) {
      this._identityBox.className = "chromeUI";
      let brandBundle = document.getElementById("bundle_brand");
      icon_label = brandBundle.getString("brandShorterName");
    } else if (this._uriHasHost && this._isEV) {
      this._identityBox.className = "verifiedIdentity";
      if (this._isMixedActiveContentBlocked) {
        this._identityBox.classList.add("mixedActiveBlocked");
      }

      if (!this._isCertUserOverridden) {
        // If it's identified, then we can populate the dialog with credentials
        let iData = this.getIdentityData();
        tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
                                                      [iData.caOrg]);
        icon_label = iData.subjectOrg;
        if (iData.country)
          icon_country_label = "(" + iData.country + ")";

        // If the organization name starts with an RTL character, then
        // swap the positions of the organization and country code labels.
        // The Unicode ranges reflect the definition of the UCS2_CHAR_IS_BIDI
        // macro in intl/unicharutil/util/nsBidiUtils.h. When bug 218823 gets
        // fixed, this test should be replaced by one adhering to the
        // Unicode Bidirectional Algorithm proper (at the paragraph level).
        icon_labels_dir = /^[\u0590-\u08ff\ufb1d-\ufdff\ufe70-\ufefc]/.test(icon_label) ?
                          "rtl" : "ltr";
      }

    } else if (this._uriHasHost && this._isSecure) {
      this._identityBox.className = "verifiedDomain";
      if (this._isMixedActiveContentBlocked) {
        this._identityBox.classList.add("mixedActiveBlocked");
      }
      if (!this._isCertUserOverridden) {
        // It's a normal cert, verifier is the CA Org.
        tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
                                                      [this.getIdentityData().caOrg]);
      }
    } else {
      this._identityBox.className = "unknownIdentity";
      if (this._isBroken) {
        if (this._isMixedActiveContentLoaded) {
          this._identityBox.classList.add("mixedActiveContent");
        } else if (this._isMixedActiveContentBlocked) {
          this._identityBox.classList.add("mixedDisplayContentLoadedActiveBlocked");
        } else if (this._isMixedPassiveContentLoaded) {
          this._identityBox.classList.add("mixedDisplayContent");
        } else {
          this._identityBox.classList.add("weakCipher");
        }
      }
      if (this._hasInsecureLoginForms) {
        // Insecure login forms can only be present on "unknown identity"
        // pages, either already insecure or with mixed active content loaded.
        this._identityBox.classList.add("insecureLoginForms");
      }
    }

    if (this._isCertUserOverridden) {
      this._identityBox.classList.add("certUserOverridden");
      // Cert is trusted because of a security exception, verifier is a special string.
      tooltip = gNavigatorBundle.getString("identity.identified.verified_by_you");
    }

    let permissionAnchors = this._permissionAnchors;

    // hide all permission icons
    for (let icon of Object.values(permissionAnchors)) {
      icon.removeAttribute("showing");
    }

    // keeps track if we should show an indicator that there are active permissions
    let hasGrantedPermissions = false;

    // show permission icons
    let permissions = SitePermissions.getAllForBrowser(gBrowser.selectedBrowser);
    for (let permission of permissions) {
      if (permission.state == SitePermissions.BLOCK) {

        let icon = permissionAnchors[permission.id];
        if (icon) {
          icon.setAttribute("showing", "true");
        }

      } else if (permission.state != SitePermissions.UNKNOWN) {
        hasGrantedPermissions = true;
      }
    }

    if (hasGrantedPermissions) {
      this._identityBox.classList.add("grantedPermissions");
    }

    // Push the appropriate strings out to the UI
    this._connectionIcon.tooltipText = tooltip;
    this._identityIconLabels.tooltipText = tooltip;
    this._identityIcon.tooltipText = gNavigatorBundle.getString("identity.icon.tooltip");
    this._identityIconLabel.value = icon_label;
    this._identityIconCountryLabel.value = icon_country_label;
    // Set cropping and direction
    this._identityIconLabel.crop = icon_country_label ? "end" : "center";
    this._identityIconLabel.parentNode.style.direction = icon_labels_dir;
    // Hide completely if the organization label is empty
    this._identityIconLabel.parentNode.collapsed = icon_label ? false : true;
  },

  /**
   * Show the weak crypto notification bar.
   */
  showWeakCryptoInfoBar() {
    if (!this._uriHasHost || !this._isBroken || !this._sslStatus.cipherName ||
        this._sslStatus.cipherName.indexOf("_RC4_") < 0) {
      return;
    }

    let notificationBox = gBrowser.getNotificationBox();
    let notification = notificationBox.getNotificationWithValue("weak-crypto");
    if (notification) {
      return;
    }

    let brandBundle = document.getElementById("bundle_brand");
    let brandShortName = brandBundle.getString("brandShortName");
    let message = gNavigatorBundle.getFormattedString("weakCryptoOverriding.message",
                                                      [brandShortName]);

    let host = this._uri.host;
    let port = 443;
    try {
      if (this._uri.port > 0) {
        port = this._uri.port;
      }
    } catch (e) {}

    let buttons = [{
      label: gNavigatorBundle.getString("revokeOverride.label"),
      accessKey: gNavigatorBundle.getString("revokeOverride.accesskey"),
      callback(aNotification, aButton) {
        try {
          let weakCryptoOverride = Cc["@mozilla.org/security/weakcryptooverride;1"]
                                     .getService(Ci.nsIWeakCryptoOverride);
          weakCryptoOverride.removeWeakCryptoOverride(host, port,
            PrivateBrowsingUtils.isBrowserPrivate(gBrowser.selectedBrowser));
          BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE);
        } catch (e) {
          Cu.reportError(e);
        }
      }
    }];

    const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
    notificationBox.appendNotification(message, "weak-crypto", null,
                                       priority, buttons);
  },

  /**
   * Set up the title and content messages for the identity message popup,
   * based on the specified mode, and the details of the SSL cert, where
   * applicable
   */
  refreshIdentityPopup() {
    // Update "Learn More" for Mixed Content Blocking and Insecure Login Forms.
    let baseURL = Services.urlFormatter.formatURLPref("app.support.baseURL");
    this._identityPopupMixedContentLearnMore
        .setAttribute("href", baseURL + "mixed-content");
    this._identityPopupInsecureLoginFormsLearnMore
        .setAttribute("href", baseURL + "insecure-password");

    // Determine connection security information.
    let connection = "not-secure";
    if (this._isSecureInternalUI) {
      connection = "chrome";
    } else if (this._isURILoadedFromFile) {
      connection = "file";
    } else if (this._isEV) {
      connection = "secure-ev";
    } else if (this._isCertUserOverridden) {
      connection = "secure-cert-user-overridden";
    } else if (this._isSecure) {
      connection = "secure";
    }

    // Determine if there are insecure login forms.
    let loginforms = "secure";
    if (this._hasInsecureLoginForms) {
      loginforms = "insecure";
    }

    // Determine the mixed content state.
    let mixedcontent = [];
    if (this._isMixedPassiveContentLoaded) {
      mixedcontent.push("passive-loaded");
    }
    if (this._isMixedActiveContentLoaded) {
      mixedcontent.push("active-loaded");
    } else if (this._isMixedActiveContentBlocked) {
      mixedcontent.push("active-blocked");
    }
    mixedcontent = mixedcontent.join(" ");

    // We have no specific flags for weak ciphers (yet). If a connection is
    // broken and we can't detect any mixed content loaded then it's a weak
    // cipher.
    let ciphers = "";
    if (this._isBroken && !this._isMixedActiveContentLoaded && !this._isMixedPassiveContentLoaded) {
      ciphers = "weak";
    }

    // Update all elements.
    let elementIDs = [
      "identity-popup",
      "identity-popup-securityView-body",
    ];

    function updateAttribute(elem, attr, value) {
      if (value) {
        elem.setAttribute(attr, value);
      } else {
        elem.removeAttribute(attr);
      }
    }

    for (let id of elementIDs) {
      let element = document.getElementById(id);
      updateAttribute(element, "connection", connection);
      updateAttribute(element, "loginforms", loginforms);
      updateAttribute(element, "ciphers", ciphers);
      updateAttribute(element, "mixedcontent", mixedcontent);
      updateAttribute(element, "isbroken", this._isBroken);
    }

    // Initialize the optional strings to empty values
    let supplemental = "";
    let verifier = "";
    let host = "";
    let owner = "";
    let hostless = false;

    try {
      host = this.getEffectiveHost();
    } catch (e) {
      // Some URIs might have no hosts.
    }

    // Fallback for special protocols.
    if (!host) {
      host = this._uri.specIgnoringRef;
      // Special URIs without a host (eg, about:) should crop the end so
      // the protocol can be seen.
      hostless = true;
    }

    // Fill in the CA name if we have a valid TLS certificate.
    if (this._isSecure || this._isCertUserOverridden) {
      verifier = this._identityIconLabels.tooltipText;
    }

    // Fill in organization information if we have a valid EV certificate.
    if (this._isEV) {
      let iData = this.getIdentityData();
      host = owner = iData.subjectOrg;
      verifier = this._identityIconLabels.tooltipText;

      // Build an appropriate supplemental block out of whatever location data we have
      if (iData.city)
        supplemental += iData.city + "\n";
      if (iData.state && iData.country)
        supplemental += gNavigatorBundle.getFormattedString("identity.identified.state_and_country",
                                                            [iData.state, iData.country]);
      else if (iData.state) // State only
        supplemental += iData.state;
      else if (iData.country) // Country only
        supplemental += iData.country;
    }

    // Push the appropriate strings out to the UI.
    this._identityPopupContentHosts.forEach((el) => {
      el.textContent = host;
      el.hidden = hostless;
    });
    this._identityPopupContentHostless.forEach((el) => {
      el.setAttribute("value", host);
      el.hidden = !hostless;
    });
    this._identityPopupContentOwner.textContent = owner;
    this._identityPopupContentSupp.textContent = supplemental;
    this._identityPopupContentVerif.textContent = verifier;

    // Update per-site permissions section.
    this.updateSitePermissions();
  },

  setURI(uri) {
    this._uri = uri;

    try {
      this._uri.host;
      this._uriHasHost = true;
    } catch (ex) {
      this._uriHasHost = false;
    }

    let whitelist = /^(?:accounts|addons|cache|config|crashes|customizing|downloads|healthreport|home|license|newaddon|permissions|preferences|privatebrowsing|rights|searchreset|sessionrestore|support|welcomeback)(?:[?#]|$)/i;
    this._isSecureInternalUI = uri.schemeIs("about") && whitelist.test(uri.path);

    // Create a channel for the sole purpose of getting the resolved URI
    // of the request to determine if it's loaded from the file system.
    this._isURILoadedFromFile = false;
    let chanOptions = {uri: this._uri, loadUsingSystemPrincipal: true};
    let resolvedURI;
    try {
      resolvedURI = NetUtil.newChannel(chanOptions).URI;
      if (resolvedURI.schemeIs("jar")) {
        // Given a URI "jar:<jar-file-uri>!/<jar-entry>"
        // create a new URI using <jar-file-uri>!/<jar-entry>
        resolvedURI = NetUtil.newURI(resolvedURI.path);
      }
      // Check the URI again after resolving.
      this._isURILoadedFromFile = resolvedURI.schemeIs("file");
    } catch (ex) {
      // NetUtil's methods will throw for malformed URIs and the like
    }
  },

  /**
   * Click handler for the identity-box element in primary chrome.
   */
  handleIdentityButtonEvent(event) {
    event.stopPropagation();

    if ((event.type == "click" && event.button != 0) ||
        (event.type == "keypress" && event.charCode != KeyEvent.DOM_VK_SPACE &&
         event.keyCode != KeyEvent.DOM_VK_RETURN)) {
      return; // Left click, space or enter only
    }

    // Don't allow left click, space or enter if the location has been modified,
    // so long as we're not sharing any devices.
    // If we are sharing a device, the identity block is prevented by CSS from
    // being focused (and therefore, interacted with) by the user. However, we
    // want to allow opening the identity popup from the device control menu,
    // which calls click() on the identity button, so we don't return early.
    if (!this._sharingState &&
        gURLBar.getAttribute("pageproxystate") != "valid") {
      return;
    }

    this._popupTriggeredByKeyboard = event.type == "keypress";

    // Make sure that the display:none style we set in xul is removed now that
    // the popup is actually needed
    this._identityPopup.hidden = false;

    // Remove the reload hint that we show after a user has cleared a permission.
    this._permissionReloadHint.setAttribute("hidden", "true");

    // Update the popup strings
    this.refreshIdentityPopup();

    // Add the "open" attribute to the identity box for styling
    this._identityBox.setAttribute("open", "true");

    // Now open the popup, anchored off the primary chrome element
    this._identityPopup.openPopup(this._identityIcon, "bottomcenter topleft");
  },

  onPopupShown(event) {
    if (event.target == this._identityPopup) {
      if (this._popupTriggeredByKeyboard) {
        // Move focus to the next available element in the identity popup.
        // This is required by role=alertdialog and fixes an issue where
        // an already open panel would steal focus from the identity popup.
        document.commandDispatcher.advanceFocusIntoSubtree(this._identityPopup);
      }

      window.addEventListener("focus", this, true);
    }
  },

  onPopupHidden(event) {
    if (event.target == this._identityPopup) {
      window.removeEventListener("focus", this, true);
      this._identityBox.removeAttribute("open");
    }
  },

  handleEvent(event) {
    let elem = document.activeElement;
    let position = elem.compareDocumentPosition(this._identityPopup);

    if (!(position & (Node.DOCUMENT_POSITION_CONTAINS |
                      Node.DOCUMENT_POSITION_CONTAINED_BY)) &&
        !this._identityPopup.hasAttribute("noautohide")) {
      // Hide the panel when focusing an element that is
      // neither an ancestor nor descendant unless the panel has
      // @noautohide (e.g. for a tour).
      this._identityPopup.hidePopup();
    }
  },

  observe(subject, topic, data) {
    if (topic == "perm-changed") {
      this.refreshIdentityBlock();
    }
  },

  onDragStart(event) {
    if (gURLBar.getAttribute("pageproxystate") != "valid")
      return;

    let value = gBrowser.currentURI.spec;
    let urlString = value + "\n" + gBrowser.contentTitle;
    let htmlString = "<a href=\"" + value + "\">" + value + "</a>";

    let dt = event.dataTransfer;
    dt.setData("text/x-moz-url", urlString);
    dt.setData("text/uri-list", value);
    dt.setData("text/plain", value);
    dt.setData("text/html", htmlString);
    dt.setDragImage(this._identityIcon, 16, 16);
  },

  onLocationChange() {
    this._permissionReloadHint.setAttribute("hidden", "true");

    if (!this._permissionList.hasChildNodes()) {
      this._permissionEmptyHint.removeAttribute("hidden");
    }
  },

  updateSitePermissions() {
    while (this._permissionList.hasChildNodes())
      this._permissionList.removeChild(this._permissionList.lastChild);

    let permissions =
      SitePermissions.getAllPermissionDetailsForBrowser(gBrowser.selectedBrowser);

    if (this._sharingState) {
      // If WebRTC device or screen permissions are in use, we need to find
      // the associated permission item to set the inUse field to true.
      for (let id of ["camera", "microphone", "screen"]) {
        if (this._sharingState[id]) {
          let found = false;
          for (let permission of permissions) {
            if (permission.id != id)
              continue;
            found = true;
            permission.inUse = true;
            break;
          }
          if (!found) {
            // If the permission item we were looking for doesn't exist,
            // the user has temporarily allowed sharing and we need to add
            // an item in the permissions array to reflect this.
            permissions.push({
              id,
              state: SitePermissions.ALLOW,
              scope: SitePermissions.SCOPE_REQUEST,
              inUse: true,
            });
          }
        }
      }
    }
    for (let permission of permissions) {
      let item = this._createPermissionItem(permission);
      this._permissionList.appendChild(item);
    }

    // Show a placeholder text if there's no permission and no reload hint.
    if (!this._permissionList.hasChildNodes() &&
        this._permissionReloadHint.hasAttribute("hidden")) {
      this._permissionEmptyHint.removeAttribute("hidden");
    } else {
      this._permissionEmptyHint.setAttribute("hidden", "true");
    }
  },

  _handleHeightChange(aFunction, aWillShowReloadHint) {
    let heightBefore = getComputedStyle(this._permissionList).height;
    aFunction();
    let heightAfter = getComputedStyle(this._permissionList).height;
    // Showing the reload hint increases the height, we need to account for it.
    if (aWillShowReloadHint) {
      heightAfter = parseInt(heightAfter) +
                    parseInt(getComputedStyle(this._permissionList.nextSibling).height);
    }
    let heightChange = parseInt(heightAfter) - parseInt(heightBefore);
    if (heightChange)
      this._identityPopupMultiView.setHeightToFit(heightChange);
  },

  _createPermissionItem(aPermission) {
    let container = document.createElement("hbox");
    container.setAttribute("class", "identity-popup-permission-item");
    container.setAttribute("align", "center");

    let img = document.createElement("image");
    let classes = "identity-popup-permission-icon " + aPermission.id + "-icon";
    if (aPermission.state == SitePermissions.BLOCK)
      classes += " blocked-permission-icon";
    if (aPermission.inUse)
      classes += " in-use";
    img.setAttribute("class", classes);

    let nameLabel = document.createElement("label");
    nameLabel.setAttribute("flex", "1");
    nameLabel.setAttribute("class", "identity-popup-permission-label");
    nameLabel.textContent = SitePermissions.getPermissionLabel(aPermission.id);

    let stateLabel = document.createElement("label");
    stateLabel.setAttribute("flex", "1");
    stateLabel.setAttribute("class", "identity-popup-permission-state-label");
    let {state, scope} = aPermission;
    // If the user did not permanently allow this device but it is currently
    // used, set the variables to display a "temporarily allowed" info.
    if (state != SitePermissions.ALLOW && aPermission.inUse) {
      state = SitePermissions.ALLOW;
      scope = SitePermissions.SCOPE_REQUEST;
    }
    stateLabel.textContent = SitePermissions.getCurrentStateLabel(state, scope);

    let button = document.createElement("button");
    button.setAttribute("class", "identity-popup-permission-remove-button");
    let tooltiptext = gNavigatorBundle.getString("permissions.remove.tooltip");
    button.setAttribute("tooltiptext", tooltiptext);
    button.addEventListener("command", () => {
	  let browser = gBrowser.selectedBrowser;
      // Only resize the window if the reload hint was previously hidden.
      this._handleHeightChange(() => this._permissionList.removeChild(container),
                               this._permissionReloadHint.hasAttribute("hidden"));
      if (aPermission.inUse &&
          ["camera", "microphone", "screen"].includes(aPermission.id)) {
        let windowId = this._sharingState.windowId;
        if (aPermission.id == "screen") {
          windowId = "screen:" + windowId;
        } else {
          // If we set persistent permissions or the sharing has
          // started due to existing persistent permissions, we need
          // to handle removing these even for frames with different hostnames.
          let uris = browser._devicePermissionURIs || [];
          for (let uri of uris) {
            // It's not possible to stop sharing one of camera/microphone
            // without the other.
            for (let id of ["camera", "microphone"]) {
              if (this._sharingState[id]) {
                let perm = SitePermissions.get(uri, id);
                if (perm.state == SitePermissions.ALLOW &&
                    perm.scope == SitePermissions.SCOPE_PERSISTENT) {
                  SitePermissions.remove(uri, id);
                }
              }
            }
          }
        }
        browser.messageManager.sendAsyncMessage("webrtc:StopSharing", windowId);
        webrtcUI.forgetActivePermissionsFromBrowser(gBrowser.selectedBrowser);
      }
      SitePermissions.remove(gBrowser.currentURI, aPermission.id, browser);

      this._permissionReloadHint.removeAttribute("hidden");

      // Set telemetry values for clearing a permission
      let histogram = Services.telemetry.getKeyedHistogramById("WEB_PERMISSION_CLEARED");

      let permissionType = 0;
      if (aPermission.state == SitePermissions.ALLOW &&
          aPermission.scope == SitePermissions.SCOPE_PERSISTENT) {
        // 1 : clear permanently allowed permission
        permissionType = 1;
      } else if (aPermission.state == SitePermissions.BLOCK &&
                 aPermission.scope == SitePermissions.SCOPE_PERSISTENT) {
        // 2 : clear permanently blocked permission
        permissionType = 2;
      } else if (aPermission.state == SitePermissions.ALLOW) {
        // 3 : clear temporary allowed permission
        permissionType = 3;
      } else if (aPermission.state == SitePermissions.BLOCK) {
        // 4 : clear temporary blocked permission
        permissionType = 4;
      }

      histogram.add("(all)", permissionType);
      histogram.add(aPermission.id, permissionType);
    });

    container.appendChild(img);
    container.appendChild(nameLabel);
    container.appendChild(stateLabel);
    container.appendChild(button);

    return container;
  }
};

function getNotificationBox(aWindow) {
  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
  if (foundBrowser)
    return gBrowser.getNotificationBox(foundBrowser)
  return null;
}

function getTabModalPromptBox(aWindow) {
  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
  if (foundBrowser)
    return gBrowser.getTabModalPromptBox(foundBrowser);
  return null;
}

/* DEPRECATED */
function getBrowser() {
  return gBrowser;
}
function getNavToolbox() {
  return gNavToolbox;
}

var gPrivateBrowsingUI = {
  init: function PBUI_init() {
    // Do nothing for normal windows
    if (!PrivateBrowsingUtils.isWindowPrivate(window)) {
      return;
    }

    // Disable the Clear Recent History... menu item when in PB mode
    // temporary fix until bug 463607 is fixed
    document.getElementById("Tools:Sanitize").setAttribute("disabled", "true");

    if (window.location.href == getBrowserURL()) {
      // Adjust the window's title
      let docElement = document.documentElement;
      if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
        docElement.setAttribute("title",
          docElement.getAttribute("title_privatebrowsing"));
        docElement.setAttribute("titlemodifier",
          docElement.getAttribute("titlemodifier_privatebrowsing"));
      }
      docElement.setAttribute("privatebrowsingmode",
        PrivateBrowsingUtils.permanentPrivateBrowsing ? "permanent" : "temporary");
      gBrowser.updateTitlebar();

      if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
        // Adjust the New Window menu entries
        [
          { normal: "menu_newNavigator", private: "menu_newPrivateWindow" },
        ].forEach(function(menu) {
          let newWindow = document.getElementById(menu.normal);
          let newPrivateWindow = document.getElementById(menu.private);
          if (newWindow && newPrivateWindow) {
            newPrivateWindow.hidden = true;
            newWindow.label = newPrivateWindow.label;
            newWindow.accessKey = newPrivateWindow.accessKey;
            newWindow.command = newPrivateWindow.command;
          }
        });
      }
    }

    let urlBarSearchParam = gURLBar.getAttribute("autocompletesearchparam") || "";
    if (!PrivateBrowsingUtils.permanentPrivateBrowsing &&
        !urlBarSearchParam.includes("disable-private-actions")) {
      // Disable switch to tab autocompletion for private windows.
      // We leave it enabled for permanent private browsing mode though.
      urlBarSearchParam += " disable-private-actions";
    }
    if (!urlBarSearchParam.includes("private-window")) {
      urlBarSearchParam += " private-window";
    }
    gURLBar.setAttribute("autocompletesearchparam", urlBarSearchParam);
  }
};

var gRemoteTabsUI = {
  init() {
    if (window.location.href != getBrowserURL() &&
        // Also check hidden window for the Mac no-window case
        window.location.href != "chrome://browser/content/hiddenWindow.xul") {
      return;
    }

#ifdef XP_MACOSX
    if (Services.prefs.getBoolPref("layers.acceleration.disabled")) {
      // On OS X, "Disable Hardware Acceleration" also disables OMTC and forces
      // a fallback to Basic Layers. This is incompatible with e10s.
      return;
    }
#endif

    let newNonRemoteWindow = document.getElementById("menu_newNonRemoteWindow");
    let autostart = Services.appinfo.browserTabsRemoteAutostart;
    newNonRemoteWindow.hidden = !autostart;
  }
};

/**
 * Switch to a tab that has a given URI, and focuses its browser window.
 * If a matching tab is in this window, it will be switched to. Otherwise, other
 * windows will be searched.
 *
 * @param aURI
 *        URI to search for
 * @param aOpenNew
 *        True to open a new tab and switch to it, if no existing tab is found.
 *        If no suitable window is found, a new one will be opened.
 * @param aOpenParams
 *        If switching to this URI results in us opening a tab, aOpenParams
 *        will be the parameter object that gets passed to openUILinkIn. Please
 *        see the documentation for openUILinkIn to see what parameters can be
 *        passed via this object.
 *        This object also allows:
 *        - 'ignoreFragment' property to be set to true to exclude fragment-portion
 *        matching when comparing URIs.
 *          If set to "whenComparing", the fragment will be unmodified.
 *          If set to "whenComparingAndReplace", the fragment will be replaced.
 *        - 'ignoreQueryString' boolean property to be set to true to exclude query string
 *        matching when comparing URIs.
 *        - 'replaceQueryString' boolean property to be set to true to exclude query string
 *        matching when comparing URIs and overwrite the initial query string with
 *        the one from the new URI.
 * @return True if an existing tab was found, false otherwise
 */
function switchToTabHavingURI(aURI, aOpenNew, aOpenParams = {}) {
  // Certain URLs can be switched to irrespective of the source or destination
  // window being in private browsing mode:
  const kPrivateBrowsingWhitelist = new Set([
    "about:addons",
  ]);

  let ignoreFragment = aOpenParams.ignoreFragment;
  let ignoreQueryString = aOpenParams.ignoreQueryString;
  let replaceQueryString = aOpenParams.replaceQueryString;

  // These properties are only used by switchToTabHavingURI and should
  // not be used as a parameter for the new load.
  delete aOpenParams.ignoreFragment;
  delete aOpenParams.ignoreQueryString;
  delete aOpenParams.replaceQueryString;

  // This will switch to the tab in aWindow having aURI, if present.
  function switchIfURIInWindow(aWindow) {
    // Only switch to the tab if neither the source nor the destination window
    // are private and they are not in permanent private browsing mode
    if (!kPrivateBrowsingWhitelist.has(aURI.spec) &&
        (PrivateBrowsingUtils.isWindowPrivate(window) ||
         PrivateBrowsingUtils.isWindowPrivate(aWindow)) &&
        !PrivateBrowsingUtils.permanentPrivateBrowsing) {
      return false;
    }

    // Remove the query string, fragment, both, or neither from a given url.
    function cleanURL(url, removeQuery, removeFragment) {
      let ret = url;
      if (removeFragment) {
        ret = ret.split("#")[0];
        if (removeQuery) {
          // This removes a query, if present before the fragment.
          ret = ret.split("?")[0];
        }
      } else if (removeQuery) {
        // This is needed in case there is a fragment after the query.
        let fragment = ret.split("#")[1];
        ret = ret.split("?")[0].concat(
          (fragment != undefined) ? "#".concat(fragment) : "");
      }
      return ret;
    }

    // Need to handle nsSimpleURIs here too (e.g. about:...), which don't
    // work correctly with URL objects - so treat them as strings
    let ignoreFragmentWhenComparing = typeof ignoreFragment == "string" &&
                                      ignoreFragment.startsWith("whenComparing");
    let requestedCompare = cleanURL(
        aURI.spec, ignoreQueryString || replaceQueryString, ignoreFragmentWhenComparing);
    let browsers = aWindow.gBrowser.browsers;
    for (let i = 0; i < browsers.length; i++) {
      let browser = browsers[i];
      let browserCompare = cleanURL(
          browser.currentURI.spec, ignoreQueryString || replaceQueryString, ignoreFragmentWhenComparing);
      if (requestedCompare == browserCompare) {
        aWindow.focus();
        if (ignoreFragment == "whenComparingAndReplace" || replaceQueryString) {
          browser.loadURI(aURI.spec);
        }
        aWindow.gBrowser.tabContainer.selectedIndex = i;
        return true;
      }
    }
    return false;
  }

  // This can be passed either nsIURI or a string.
  if (!(aURI instanceof Ci.nsIURI))
    aURI = Services.io.newURI(aURI);

  let isBrowserWindow = !!window.gBrowser;

  // Prioritise this window.
  if (isBrowserWindow && switchIfURIInWindow(window))
    return true;

  for (let browserWin of browserWindows()) {
    // Skip closed (but not yet destroyed) windows,
    // and the current window (which was checked earlier).
    if (browserWin.closed || browserWin == window)
      continue;
    if (switchIfURIInWindow(browserWin))
      return true;
  }

  // No opened tab has that url.
  if (aOpenNew) {
    if (isBrowserWindow && isTabEmpty(gBrowser.selectedTab))
      openUILinkIn(aURI.spec, "current", aOpenParams);
    else
      openUILinkIn(aURI.spec, "tab", aOpenParams);
  }

  return false;
}

var RestoreLastSessionObserver = {
  init() {
    if (SessionStore.canRestoreLastSession &&
        !PrivateBrowsingUtils.isWindowPrivate(window)) {
      Services.obs.addObserver(this, "sessionstore-last-session-cleared", true);
      goSetCommandEnabled("Browser:RestoreLastSession", true);
    }
  },

  observe() {
    // The last session can only be restored once so there's
    // no way we need to re-enable our menu item.
    Services.obs.removeObserver(this, "sessionstore-last-session-cleared");
    goSetCommandEnabled("Browser:RestoreLastSession", false);
  },

  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
                                         Ci.nsISupportsWeakReference])
};

function restoreLastSession() {
  SessionStore.restoreLastSession();
}

var TabContextMenu = {
  contextTab: null,
  _updateToggleMuteMenuItem(aTab, aConditionFn) {
    ["muted", "soundplaying"].forEach(attr => {
      if (!aConditionFn || aConditionFn(attr)) {
        if (aTab.hasAttribute(attr)) {
          aTab.toggleMuteMenuItem.setAttribute(attr, "true");
        } else {
          aTab.toggleMuteMenuItem.removeAttribute(attr);
        }
      }
    });
  },
  updateContextMenu: function updateContextMenu(aPopupMenu) {
    this.contextTab = aPopupMenu.triggerNode.localName == "tab" ?
                      aPopupMenu.triggerNode : gBrowser.selectedTab;
    let disabled = gBrowser.tabs.length == 1;

    var menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple");
    for (let menuItem of menuItems)
      menuItem.disabled = disabled;

    if (this.contextTab.hasAttribute("customizemode"))
      document.getElementById("context_openTabInWindow").disabled = true;

#ifdef E10S_TESTING_ONLY
    menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-remote");
    for (let menuItem of menuItems) {
      menuItem.hidden = !gMultiProcessBrowser;
      if (menuItem.id == "context_openNonRemoteWindow") {
        menuItem.disabled = !!parseInt(this.contextTab.getAttribute("usercontextid"));
      }
    }
#endif

    disabled = gBrowser.visibleTabs.length == 1;
    menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple-visible");
    for (let menuItem of menuItems)
      menuItem.disabled = disabled;

    // Session store
    document.getElementById("context_undoCloseTab").disabled =
      SessionStore.getClosedTabCount(window) == 0;

    // Only one of pin/unpin should be visible
    document.getElementById("context_pinTab").hidden = this.contextTab.pinned;
    document.getElementById("context_unpinTab").hidden = !this.contextTab.pinned;

    // Disable "Close Tabs to the Right" if there are no tabs
    // following it and hide it when the user rightclicked on a pinned
    // tab.
    document.getElementById("context_closeTabsToTheEnd").disabled =
      gBrowser.getTabsToTheEndFrom(this.contextTab).length == 0;
    document.getElementById("context_closeTabsToTheEnd").hidden = this.contextTab.pinned;

    // Disable "Close other Tabs" if there is only one unpinned tab and
    // hide it when the user rightclicked on a pinned tab.
    let unpinnedTabs = gBrowser.visibleTabs.length - gBrowser._numPinnedTabs;
    document.getElementById("context_closeOtherTabs").disabled = unpinnedTabs <= 1;
    document.getElementById("context_closeOtherTabs").hidden = this.contextTab.pinned;

    // Hide "Bookmark All Tabs" for a pinned tab.  Update its state if visible.
    let bookmarkAllTabs = document.getElementById("context_bookmarkAllTabs");
    bookmarkAllTabs.hidden = this.contextTab.pinned;
    if (!bookmarkAllTabs.hidden)
      PlacesCommandHook.updateBookmarkAllTabsCommand();

    // Adjust the state of the toggle mute menu item.
    let toggleMute = document.getElementById("context_toggleMuteTab");
    if (this.contextTab.hasAttribute("blocked")) {
      toggleMute.label = gNavigatorBundle.getString("playTab.label");
      toggleMute.accessKey = gNavigatorBundle.getString("playTab.accesskey");
    } else if (this.contextTab.hasAttribute("muted")) {
      toggleMute.label = gNavigatorBundle.getString("unmuteTab.label");
      toggleMute.accessKey = gNavigatorBundle.getString("unmuteTab.accesskey");
    } else {
      toggleMute.label = gNavigatorBundle.getString("muteTab.label");
      toggleMute.accessKey = gNavigatorBundle.getString("muteTab.accesskey");
    }

    this.contextTab.toggleMuteMenuItem = toggleMute;
    this._updateToggleMuteMenuItem(this.contextTab);

    this.contextTab.addEventListener("TabAttrModified", this);
    aPopupMenu.addEventListener("popuphiding", this);

    gFxAccounts.updateTabContextMenu(aPopupMenu, this.contextTab);
  },
  handleEvent(aEvent) {
    switch (aEvent.type) {
      case "popuphiding":
        gBrowser.removeEventListener("TabAttrModified", this);
        aEvent.target.removeEventListener("popuphiding", this);
        break;
      case "TabAttrModified":
        let tab = aEvent.target;
        this._updateToggleMuteMenuItem(tab,
          attr => aEvent.detail.changed.indexOf(attr) >= 0);
        break;
    }
  }
};

Object.defineProperty(this, "HUDService", {
  get: function HUDService_getter() {
    let devtools = Cu.import("resource://devtools/shared/Loader.jsm", {}).devtools;
    return devtools.require("devtools/client/webconsole/hudservice").HUDService;
  },
  configurable: true,
  enumerable: true
});

// Prompt user to restart the browser in safe mode
function safeModeRestart() {
  if (Services.appinfo.inSafeMode) {
    let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"].
                     createInstance(Ci.nsISupportsPRBool);
    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");

    if (cancelQuit.data)
      return;

    Services.startup.quit(Ci.nsIAppStartup.eRestart | Ci.nsIAppStartup.eAttemptQuit);
    return;
  }

  Services.obs.notifyObservers(null, "restart-in-safe-mode", "");
}

/* duplicateTabIn duplicates tab in a place specified by the parameter |where|.
 *
 * |where| can be:
 *  "tab"         new tab
 *  "tabshifted"  same as "tab" but in background if default is to select new
 *                tabs, and vice versa
 *  "window"      new window
 *
 * delta is the offset to the history entry that you want to load.
 */
function duplicateTabIn(aTab, where, delta) {
  switch (where) {
    case "window":
      let otherWin = OpenBrowserWindow();
      let delayedStartupFinished = (subject, topic) => {
        if (topic == "browser-delayed-startup-finished" &&
            subject == otherWin) {
          Services.obs.removeObserver(delayedStartupFinished, topic);
          let otherGBrowser = otherWin.gBrowser;
          let otherTab = otherGBrowser.selectedTab;
          SessionStore.duplicateTab(otherWin, aTab, delta);
          otherGBrowser.removeTab(otherTab, { animate: false });
        }
      };

      Services.obs.addObserver(delayedStartupFinished,
                               "browser-delayed-startup-finished",
                               false);
      break;
    case "tabshifted":
      SessionStore.duplicateTab(window, aTab, delta);
      // A background tab has been opened, nothing else to do here.
      break;
    case "tab":
      let newTab = SessionStore.duplicateTab(window, aTab, delta);
      gBrowser.selectedTab = newTab;
      break;
  }
}

var Scratchpad = {
  openScratchpad: function SP_openScratchpad() {
    return this.ScratchpadManager.openScratchpad();
  }
};

XPCOMUtils.defineLazyGetter(Scratchpad, "ScratchpadManager", function() {
  let tmp = {};
  Cu.import("resource://devtools/client/scratchpad/scratchpad-manager.jsm", tmp);
  return tmp.ScratchpadManager;
});

var ResponsiveUI = {
  toggle: function RUI_toggle() {
    this.ResponsiveUIManager.toggle(window, gBrowser.selectedTab);
  }
};

XPCOMUtils.defineLazyGetter(ResponsiveUI, "ResponsiveUIManager", function() {
  let tmp = {};
  Cu.import("resource://devtools/client/responsivedesign/responsivedesign.jsm", tmp);
  return tmp.ResponsiveUIManager;
});

var MousePosTracker = {
  _listeners: new Set(),
  _x: 0,
  _y: 0,
  get _windowUtils() {
    delete this._windowUtils;
    return this._windowUtils = window.getInterface(Ci.nsIDOMWindowUtils);
  },

  addListener(listener) {
    if (this._listeners.has(listener))
      return;

    listener._hover = false;
    this._listeners.add(listener);

    this._callListener(listener);
  },

  removeListener(listener) {
    this._listeners.delete(listener);
  },

  handleEvent(event) {
    var fullZoom = this._windowUtils.fullZoom;
    this._x = event.screenX / fullZoom - window.mozInnerScreenX;
    this._y = event.screenY / fullZoom - window.mozInnerScreenY;

    this._listeners.forEach(function(listener) {
      try {
        this._callListener(listener);
      } catch (e) {
        Cu.reportError(e);
      }
    }, this);
  },

  _callListener(listener) {
    let rect = listener.getMouseTargetRect();
    let hover = this._x >= rect.left &&
                this._x <= rect.right &&
                this._y >= rect.top &&
                this._y <= rect.bottom;

    if (hover == listener._hover)
      return;

    listener._hover = hover;

    if (hover) {
      if (listener.onMouseEnter)
        listener.onMouseEnter();
    } else if (listener.onMouseLeave) {
      listener.onMouseLeave();
    }
  }
};

var ToolbarIconColor = {
  init() {
    this._initialized = true;

    window.addEventListener("activate", this);
    window.addEventListener("deactivate", this);
    Services.obs.addObserver(this, "lightweight-theme-styling-update", false);
    gPrefService.addObserver("ui.colorChanged", this, false);

    // If the window isn't active now, we assume that it has never been active
    // before and will soon become active such that inferFromText will be
    // called from the initial activate event.
    if (Services.focus.activeWindow == window)
      this.inferFromText();
  },

  uninit() {
    this._initialized = false;

    window.removeEventListener("activate", this);
    window.removeEventListener("deactivate", this);
    Services.obs.removeObserver(this, "lightweight-theme-styling-update");
    gPrefService.removeObserver("ui.colorChanged", this);
  },

  handleEvent(event) {
    switch (event.type) {
      case "activate":
      case "deactivate":
        this.inferFromText();
        break;
    }
  },

  observe(aSubject, aTopic, aData) {
    switch (aTopic) {
      case "lightweight-theme-styling-update":
        // inferFromText needs to run after LightweightThemeConsumer.jsm's
        // lightweight-theme-styling-update observer.
        setTimeout(() => { this.inferFromText(); }, 0);
        break;
      case "nsPref:changed":
        // system color change
        var colorChangedPref = false;
        try {
          colorChangedPref = gPrefService.getBoolPref("ui.colorChanged");
        } catch(e) { }
        // if pref indicates change, call inferFromText() on a small delay
        if (colorChangedPref == true)
          setTimeout(() => { this.inferFromText(); }, 300);
        break;
      default:
        console.error("ToolbarIconColor: Uncaught topic " + aTopic);
    }
  },

  inferFromText() {
    if (!this._initialized)
      return;

    function parseRGB(aColorString) {
      let rgb = aColorString.match(/^rgba?\((\d+), (\d+), (\d+)/);
      rgb.shift();
      return rgb.map(x => parseInt(x));
    }

#ifdef XP_MACOSX
    let toolbarSelector = "#navigator-toolbox > toolbar:not([collapsed=true]):not(#addon-bar):not([type=menubar])";
#else
    let toolbarSelector = "#navigator-toolbox > toolbar:not([collapsed=true]):not(#addon-bar)";
#endif

    // The getComputedStyle calls and setting the brighttext are separated in
    // two loops to avoid flushing layout and making it dirty repeatedly.

    let luminances = new Map;
    for (let toolbar of document.querySelectorAll(toolbarSelector)) {
      let [r, g, b] = parseRGB(getComputedStyle(toolbar).color);
      let luminance = (2 * r + 5 * g + b) / 8;
      luminances.set(toolbar, luminance);
    }

    for (let [toolbar, luminance] of luminances) {
      if (luminance <= 128)
        toolbar.removeAttribute("brighttext");
      else
        toolbar.setAttribute("brighttext", "true");
    }
    
    // Clear pref if set, since we're done applying the color changes.
    gPrefService.clearUserPref("ui.colorChanged");
  }
}

var PanicButtonNotifier = {
  init() {
    this._initialized = true;
    if (window.PanicButtonNotifierShouldNotify) {
      delete window.PanicButtonNotifierShouldNotify;
      this.notify();
    }
  },
  notify() {
    if (!this._initialized) {
      window.PanicButtonNotifierShouldNotify = true;
      return;
    }
    // Display notification panel here...
    try {
      let popup = document.getElementById("panic-button-success-notification");
      popup.hidden = false;
      // To close the popup in 3 seconds after the popup is shown but left uninteracted.
      let onTimeout = () => {
        PanicButtonNotifier.close();
        removeListeners();
      };
      popup.addEventListener("popupshown", function() {
        PanicButtonNotifier.timer = setTimeout(onTimeout, 3000);
      });
      // To prevent the popup from closing when user tries to interact with the
      // popup using mouse or keyboard.
      let onUserInteractsWithPopup = () => {
        clearTimeout(PanicButtonNotifier.timer);
        removeListeners();
       };
      popup.addEventListener("mouseover", onUserInteractsWithPopup);
      window.addEventListener("keydown", onUserInteractsWithPopup);
      let removeListeners = () => {
        popup.removeEventListener("mouseover", onUserInteractsWithPopup);
        window.removeEventListener("keydown", onUserInteractsWithPopup);
        popup.removeEventListener("popuphidden", removeListeners);
      };
      popup.addEventListener("popuphidden", removeListeners);

      let widget = CustomizableUI.getWidget("panic-button").forWindow(window);
      let anchor = widget.anchor;
      anchor = document.getAnonymousElementByAttribute(anchor, "class", "toolbarbutton-icon");
      popup.openPopup(anchor, popup.getAttribute("position"));
    } catch (ex) {
      Cu.reportError(ex);
    }
  },
  close() {
    let popup = document.getElementById("panic-button-success-notification");
    popup.hidePopup();
  },
};

var AboutPrivateBrowsingListener = {
  init() {
    window.messageManager.addMessageListener(
      "AboutPrivateBrowsing:OpenPrivateWindow",
      msg => {
        OpenBrowserWindow({private: true});
    });
    window.messageManager.addMessageListener(
      "AboutPrivateBrowsing:ToggleTrackingProtection",
      msg => {
        const PREF = "privacy.trackingprotection.pbmode.enabled";
        Services.prefs.setBoolPref(PREF, !Services.prefs.getBoolPref(PREF));
    });
    window.messageManager.addMessageListener(
      "AboutPrivateBrowsing:DontShowIntroPanelAgain",
      msg => {
        TrackingProtection.dontShowIntroPanelAgain();
    });
  }
};

function TabModalPromptBox(browser) {
  this._weakBrowserRef = Cu.getWeakReference(browser);
}

TabModalPromptBox.prototype = {
  _promptCloseCallback(onCloseCallback, principalToAllowFocusFor, allowFocusCheckbox, ...args) {
    if (principalToAllowFocusFor && allowFocusCheckbox &&
        allowFocusCheckbox.checked) {
      Services.perms.addFromPrincipal(principalToAllowFocusFor, "focus-tab-by-prompt",
                                      Services.perms.ALLOW_ACTION);
    }
    onCloseCallback.apply(this, args);
  },

  appendPrompt(args, onCloseCallback) {
    const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
    let newPrompt = document.createElementNS(XUL_NS, "tabmodalprompt");
    let browser = this.browser;
    browser.parentNode.insertBefore(newPrompt, browser.nextSibling);
    browser.setAttribute("tabmodalPromptShowing", true);

    newPrompt.clientTop; // style flush to assure binding is attached

    let prompts = this.listPrompts();
    if (prompts.length > 1) {
      // Let's hide ourself behind the current prompt.
      newPrompt.hidden = true;
    }

    let principalToAllowFocusFor = this._allowTabFocusByPromptPrincipal;
    delete this._allowTabFocusByPromptPrincipal;

    let allowFocusCheckbox; // Define outside the if block so we can bind it into the callback.
    let hostForAllowFocusCheckbox = "";
    try {
      hostForAllowFocusCheckbox = principalToAllowFocusFor.URI.host;
    } catch (ex) { /* Ignore exceptions for host-less URIs */ }
    if (hostForAllowFocusCheckbox) {
      let allowFocusRow = document.createElementNS(XUL_NS, "row");
      allowFocusCheckbox = document.createElementNS(XUL_NS, "checkbox");
      let spacer = document.createElementNS(XUL_NS, "spacer");
      allowFocusRow.appendChild(spacer);
      let label = gBrowser.mStringBundle.getFormattedString("tabs.allowTabFocusByPromptForSite",
                                                            [hostForAllowFocusCheckbox]);
      allowFocusCheckbox.setAttribute("label", label);
      allowFocusRow.appendChild(allowFocusCheckbox);
      newPrompt.appendChild(allowFocusRow);
    }

    let tab = gBrowser.getTabForBrowser(browser);
    let closeCB = this._promptCloseCallback.bind(null, onCloseCallback, principalToAllowFocusFor,
                                                 allowFocusCheckbox);
    newPrompt.init(args, tab, closeCB);
    return newPrompt;
  },

  removePrompt(aPrompt) {
    let browser = this.browser;
    browser.parentNode.removeChild(aPrompt);

    let prompts = this.listPrompts();
    if (prompts.length) {
      let prompt = prompts[prompts.length - 1];
      prompt.hidden = false;
      prompt.Dialog.setDefaultFocus();
    } else {
      browser.removeAttribute("tabmodalPromptShowing");
      browser.focus();
    }
  },

  listPrompts(aPrompt) {
    // Get the nodelist, then return as an array
    const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
    let els = this.browser.parentNode.getElementsByTagNameNS(XUL_NS, "tabmodalprompt");
    return Array.from(els);
  },

  onNextPromptShowAllowFocusCheckboxFor(principal) {
    this._allowTabFocusByPromptPrincipal = principal;
  },

  get browser() {
    let browser = this._weakBrowserRef.get();
    if (!browser) {
      throw "Stale promptbox! The associated browser is gone.";
    }
    return browser;
  },
};