initial commit

1 files changed, 803 insertions, 0 deletions

diff --git a/components/nsBrowserContentHandler.js b/components/nsBrowserContentHandler.js
new file mode 100644
index 0000000..e7f1414
--- /dev/null
+++ b/components/nsBrowserContentHandler.js
@@ -0,0 +1,803 @@
+# 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/.
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
+                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "RecentWindow",
+                                  "resource:///modules/RecentWindow.jsm");
+
+const nsISupports            = Components.interfaces.nsISupports;
+
+const nsIBrowserDOMWindow    = Components.interfaces.nsIBrowserDOMWindow;
+const nsIBrowserHandler      = Components.interfaces.nsIBrowserHandler;
+const nsIBrowserHistory      = Components.interfaces.nsIBrowserHistory;
+const nsIChannel             = Components.interfaces.nsIChannel;
+const nsICommandLine         = Components.interfaces.nsICommandLine;
+const nsICommandLineHandler  = Components.interfaces.nsICommandLineHandler;
+const nsIContentHandler      = Components.interfaces.nsIContentHandler;
+const nsIDocShellTreeItem    = Components.interfaces.nsIDocShellTreeItem;
+const nsIDOMChromeWindow     = Components.interfaces.nsIDOMChromeWindow;
+const nsIDOMWindow           = Components.interfaces.nsIDOMWindow;
+const nsIFileURL             = Components.interfaces.nsIFileURL;
+const nsIInterfaceRequestor  = Components.interfaces.nsIInterfaceRequestor;
+const nsINetUtil             = Components.interfaces.nsINetUtil;
+const nsIPrefBranch          = Components.interfaces.nsIPrefBranch;
+const nsIPrefLocalizedString = Components.interfaces.nsIPrefLocalizedString;
+const nsISupportsString      = Components.interfaces.nsISupportsString;
+const nsIURIFixup            = Components.interfaces.nsIURIFixup;
+const nsIWebNavigation       = Components.interfaces.nsIWebNavigation;
+const nsIWindowMediator      = Components.interfaces.nsIWindowMediator;
+const nsIWindowWatcher       = Components.interfaces.nsIWindowWatcher;
+const nsIWebNavigationInfo   = Components.interfaces.nsIWebNavigationInfo;
+const nsIBrowserSearchService = Components.interfaces.nsIBrowserSearchService;
+const nsICommandLineValidator = Components.interfaces.nsICommandLineValidator;
+
+const NS_BINDING_ABORTED = Components.results.NS_BINDING_ABORTED;
+const NS_ERROR_WONT_HANDLE_CONTENT = 0x805d0001;
+const NS_ERROR_ABORT = Components.results.NS_ERROR_ABORT;
+
+const URI_INHERITS_SECURITY_CONTEXT = Components.interfaces.nsIHttpProtocolHandler
+                                        .URI_INHERITS_SECURITY_CONTEXT;
+
+function shouldLoadURI(aURI) {
+  if (aURI && !aURI.schemeIs("chrome"))
+    return true;
+
+  dump("*** Preventing external load of chrome: URI into browser window\n");
+  dump("    Use -chrome <uri> instead\n");
+  return false;
+}
+
+function resolveURIInternal(aCmdLine, aArgument) {
+  var uri = aCmdLine.resolveURI(aArgument);
+  var urifixup = Components.classes["@mozilla.org/docshell/urifixup;1"]
+                           .getService(nsIURIFixup);
+
+  if (!(uri instanceof nsIFileURL)) {
+    return urifixup.createFixupURI(aArgument,
+                                   urifixup.FIXUP_FLAG_FIX_SCHEME_TYPOS);
+  }
+
+  try {
+    if (uri.file.exists())
+      return uri;
+  }
+  catch (e) {
+    Components.utils.reportError(e);
+  }
+
+  // We have interpreted the argument as a relative file URI, but the file
+  // doesn't exist. Try URI fixup heuristics: see bug 290782.
+ 
+  try {
+    uri = urifixup.createFixupURI(aArgument, 0);
+  }
+  catch (e) {
+    Components.utils.reportError(e);
+  }
+
+  return uri;
+}
+
+var gFirstWindow = false;
+
+const OVERRIDE_NONE        = 0;
+const OVERRIDE_NEW_PROFILE = 1;
+const OVERRIDE_NEW_MSTONE  = 2;
+const OVERRIDE_NEW_BUILD_ID = 3;
+/**
+ * Determines whether a home page override is needed.
+ * Returns:
+ *  OVERRIDE_NEW_PROFILE if this is the first run with a new profile.
+ *  OVERRIDE_NEW_MSTONE if this is the first run with a build with a different
+ *                      Goanna milestone (i.e. right after an upgrade).
+ *  OVERRIDE_NEW_BUILD_ID if this is the first run with a new build ID of the
+ *                        same Goanna milestone (i.e. after a nightly upgrade).
+ *  OVERRIDE_NONE otherwise.
+ */
+function needHomepageOverride(prefb) {
+  var savedmstone = prefb.getCharPref("browser.startup.homepage_override.mstone", "");
+
+  if (savedmstone == "ignore")
+    return OVERRIDE_NONE;
+
+  var mstone = Services.appinfo.platformVersion;
+
+  var savedBuildID = prefb.getCharPref("browser.startup.homepage_override.buildID", "");
+
+  var buildID = Services.appinfo.platformBuildID;
+
+  if (mstone != savedmstone) {
+    // Bug 462254. Previous releases had a default pref to suppress the EULA
+    // agreement if the platform's installer had already shown one. Now with
+    // about:rights we've removed the EULA stuff and default pref, but we need
+    // a way to make existing profiles retain the default that we removed.
+    if (savedmstone)
+      prefb.setBoolPref("browser.rights.3.shown", true);
+    
+    prefb.setCharPref("browser.startup.homepage_override.mstone", mstone);
+    prefb.setCharPref("browser.startup.homepage_override.buildID", buildID);
+    return (savedmstone ? OVERRIDE_NEW_MSTONE : OVERRIDE_NEW_PROFILE);
+  }
+
+  if (buildID != savedBuildID) {
+    prefb.setCharPref("browser.startup.homepage_override.buildID", buildID);
+    return OVERRIDE_NEW_BUILD_ID;
+  }
+
+  return OVERRIDE_NONE;
+}
+
+/**
+ * Gets the override page for the first run after the application has been
+ * updated.
+ * @param  defaultOverridePage
+ *         The default override page.
+ * @return The override page.
+ */
+function getPostUpdateOverridePage(defaultOverridePage) {
+  var um = Components.classes["@mozilla.org/updates/update-manager;1"]
+                     .getService(Components.interfaces.nsIUpdateManager);
+  try {
+    // If the updates.xml file is deleted then getUpdateAt will throw.
+    var update = um.getUpdateAt(0)
+                   .QueryInterface(Components.interfaces.nsIPropertyBag);
+  } catch (e) {
+    // This should never happen.
+    Components.utils.reportError("Unable to find update: " + e);
+    return defaultOverridePage;
+  }
+
+  let actions = update.getProperty("actions");
+  // When the update doesn't specify actions fallback to the original behavior
+  // of displaying the default override page.
+  if (!actions)
+    return defaultOverridePage;
+
+  // The existence of silent or the non-existence of showURL in the actions both
+  // mean that an override page should not be displayed.
+  if (actions.indexOf("silent") != -1 || actions.indexOf("showURL") == -1)
+    return "";
+
+  return update.getProperty("openURL") || defaultOverridePage;
+}
+
+// Flag used to indicate that the arguments to openWindow can be passed directly.
+const NO_EXTERNAL_URIS = 1;
+
+function openWindow(parent, url, target, features, args, noExternalArgs) {
+  var wwatch = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
+                         .getService(nsIWindowWatcher);
+
+  if (noExternalArgs == NO_EXTERNAL_URIS) {
+    // Just pass in the defaultArgs directly
+    var argstring;
+    if (args) {
+      argstring = Components.classes["@mozilla.org/supports-string;1"]
+                            .createInstance(nsISupportsString);
+      argstring.data = args;
+    }
+
+    return wwatch.openWindow(parent, url, target, features, argstring);
+  }
+  
+  // Pass an array to avoid the browser "|"-splitting behavior.
+  var argArray = Components.classes["@mozilla.org/supports-array;1"]
+                    .createInstance(Components.interfaces.nsISupportsArray);
+
+  // add args to the arguments array
+  var stringArgs = null;
+  if (args instanceof Array) // array
+    stringArgs = args;
+  else if (args) // string
+    stringArgs = [args];
+
+  if (stringArgs) {
+    // put the URIs into argArray
+    var uriArray = Components.classes["@mozilla.org/supports-array;1"]
+                       .createInstance(Components.interfaces.nsISupportsArray);
+    stringArgs.forEach(function (uri) {
+      var sstring = Components.classes["@mozilla.org/supports-string;1"]
+                              .createInstance(nsISupportsString);
+      sstring.data = uri;
+      uriArray.AppendElement(sstring);
+    });
+    argArray.AppendElement(uriArray);
+  } else {
+    argArray.AppendElement(null);
+  }
+
+  // Pass these as null to ensure that we always trigger the "single URL"
+  // behavior in browser.js's gBrowserInit.onLoad (which handles the window
+  // arguments)
+  argArray.AppendElement(null); // charset
+  argArray.AppendElement(null); // referer
+  argArray.AppendElement(null); // postData
+  argArray.AppendElement(null); // allowThirdPartyFixup
+
+  return wwatch.openWindow(parent, url, target, features, argArray);
+}
+
+function openPreferences() {
+  var features = "chrome,titlebar,toolbar,centerscreen,dialog=no";
+  var url = "chrome://browser/content/preferences/preferences.xul";
+
+  var win = getMostRecentWindow("Browser:Preferences");
+  if (win) {
+    win.focus();
+  } else {
+    openWindow(null, url, "_blank", features);
+  }
+}
+
+function getMostRecentWindow(aType) {
+  var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
+                     .getService(nsIWindowMediator);
+  return wm.getMostRecentWindow(aType);
+}
+
+function doSearch(searchTerm, cmdLine) {
+  var ss = Components.classes["@mozilla.org/browser/search-service;1"]
+                     .getService(nsIBrowserSearchService);
+
+  var submission = ss.defaultEngine.getSubmission(searchTerm);
+
+  // fill our nsISupportsArray with uri-as-wstring, null, null, postData
+  var sa = Components.classes["@mozilla.org/supports-array;1"]
+                     .createInstance(Components.interfaces.nsISupportsArray);
+
+  var wuri = Components.classes["@mozilla.org/supports-string;1"]
+                       .createInstance(Components.interfaces.nsISupportsString);
+  wuri.data = submission.uri.spec;
+
+  sa.AppendElement(wuri);
+  sa.AppendElement(null);
+  sa.AppendElement(null);
+  sa.AppendElement(submission.postData);
+
+  // XXXbsmedberg: use handURIToExistingBrowser to obey tabbed-browsing
+  // preferences, but need nsIBrowserDOMWindow extensions
+
+  var wwatch = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
+                         .getService(nsIWindowWatcher);
+
+  return wwatch.openWindow(null, gBrowserContentHandler.chromeURL,
+                           "_blank",
+                           "chrome,dialog=no,all" +
+                           gBrowserContentHandler.getFeatures(cmdLine),
+                           sa);
+}
+
+function nsBrowserContentHandler() {
+}
+nsBrowserContentHandler.prototype = {
+  classID: Components.ID("{5d0ce354-df01-421a-83fb-7ead0990c24e}"),
+
+  _xpcom_factory: {
+    createInstance: function bch_factory_ci(outer, iid) {
+      if (outer)
+        throw Components.results.NS_ERROR_NO_AGGREGATION;
+      return gBrowserContentHandler.QueryInterface(iid);
+    }
+  },
+
+  /* helper functions */
+
+  mChromeURL : null,
+
+  get chromeURL() {
+    if (this.mChromeURL) {
+      return this.mChromeURL;
+    }
+
+    var prefb = Components.classes["@mozilla.org/preferences-service;1"]
+                          .getService(nsIPrefBranch);
+    this.mChromeURL = prefb.getCharPref("browser.chromeURL");
+
+    return this.mChromeURL;
+  },
+
+  /* nsISupports */
+  QueryInterface : XPCOMUtils.generateQI([nsICommandLineHandler,
+                                          nsIBrowserHandler,
+                                          nsIContentHandler,
+                                          nsICommandLineValidator]),
+
+  /* nsICommandLineHandler */
+  handle : function bch_handle(cmdLine) {
+    if (cmdLine.handleFlag("browser", false)) {
+      // Passing defaultArgs, so use NO_EXTERNAL_URIS
+      openWindow(null, this.chromeURL, "_blank",
+                 "chrome,dialog=no,all" + this.getFeatures(cmdLine),
+                 this.defaultArgs, NO_EXTERNAL_URIS);
+      cmdLine.preventDefault = true;
+    }
+
+    try {
+      var remoteCommand = cmdLine.handleFlagWithParam("remote", true);
+    }
+    catch (e) {
+      throw NS_ERROR_ABORT;
+    }
+
+    if (remoteCommand != null) {
+      try {
+        var a = /^\s*(\w+)\(([^\)]*)\)\s*$/.exec(remoteCommand);
+        var remoteVerb;
+        if (a) {
+          remoteVerb = a[1].toLowerCase();
+          var remoteParams = [];
+          var sepIndex = a[2].lastIndexOf(",");
+          if (sepIndex == -1)
+            remoteParams[0] = a[2];
+          else {
+            remoteParams[0] = a[2].substring(0, sepIndex);
+            remoteParams[1] = a[2].substring(sepIndex + 1);
+          }
+        }
+
+        switch (remoteVerb) {
+        case "openurl":
+        case "openfile":
+          // openURL(<url>)
+          // openURL(<url>,new-window)
+          // openURL(<url>,new-tab)
+
+          // First param is the URL, second param (if present) is the "target"
+          // (tab, window)
+          var url = remoteParams[0];
+          var target = nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW;
+          if (remoteParams[1]) {
+            var targetParam = remoteParams[1].toLowerCase()
+                                             .replace(/^\s*|\s*$/g, "");
+            if (targetParam == "new-tab")
+              target = nsIBrowserDOMWindow.OPEN_NEWTAB;
+            else if (targetParam == "new-window")
+              target = nsIBrowserDOMWindow.OPEN_NEWWINDOW;
+            else {
+              // The "target" param isn't one of our supported values, so
+              // assume it's part of a URL that contains commas.
+              url += "," + remoteParams[1];
+            }
+          }
+
+          var uri = resolveURIInternal(cmdLine, url);
+          handURIToExistingBrowser(uri, target, cmdLine);
+          break;
+
+        case "xfedocommand":
+          // xfeDoCommand(openBrowser)
+          if (remoteParams[0].toLowerCase() != "openbrowser")
+            throw NS_ERROR_ABORT;
+
+          // Passing defaultArgs, so use NO_EXTERNAL_URIS
+          openWindow(null, this.chromeURL, "_blank",
+                     "chrome,dialog=no,all" + this.getFeatures(cmdLine),
+                     this.defaultArgs, NO_EXTERNAL_URIS);
+          break;
+
+        default:
+          // Somebody sent us a remote command we don't know how to process:
+          // just abort.
+          throw "Unknown remote command.";
+        }
+
+        cmdLine.preventDefault = true;
+      }
+      catch (e) {
+        Components.utils.reportError(e);
+        // If we had a -remote flag but failed to process it, throw
+        // NS_ERROR_ABORT so that the xremote code knows to return a failure
+        // back to the handling code.
+        throw NS_ERROR_ABORT;
+      }
+    }
+
+    var uriparam;
+    try {
+      while ((uriparam = cmdLine.handleFlagWithParam("new-window", false))) {
+        var uri = resolveURIInternal(cmdLine, uriparam);
+        if (!shouldLoadURI(uri))
+          continue;
+        openWindow(null, this.chromeURL, "_blank",
+                   "chrome,dialog=no,all" + this.getFeatures(cmdLine),
+                   uri.spec);
+        cmdLine.preventDefault = true;
+      }
+    }
+    catch (e) {
+      Components.utils.reportError(e);
+    }
+
+    try {
+      while ((uriparam = cmdLine.handleFlagWithParam("new-tab", false))) {
+        var uri = resolveURIInternal(cmdLine, uriparam);
+        handURIToExistingBrowser(uri, nsIBrowserDOMWindow.OPEN_NEWTAB, cmdLine);
+        cmdLine.preventDefault = true;
+      }
+    }
+    catch (e) {
+      Components.utils.reportError(e);
+    }
+
+    var chromeParam = cmdLine.handleFlagWithParam("chrome", false);
+    if (chromeParam) {
+
+      // Handle the old preference dialog URL separately (bug 285416)
+      if (chromeParam == "chrome://browser/content/pref/pref.xul") {
+        openPreferences();
+        cmdLine.preventDefault = true;
+      } else try {
+        // only load URIs which do not inherit chrome privs
+        var features = "chrome,dialog=no,all" + this.getFeatures(cmdLine);
+        var uri = resolveURIInternal(cmdLine, chromeParam);
+        var netutil = Components.classes["@mozilla.org/network/util;1"]
+                                .getService(nsINetUtil);
+        if (!netutil.URIChainHasFlags(uri, URI_INHERITS_SECURITY_CONTEXT)) {
+          openWindow(null, uri.spec, "_blank", features);
+          cmdLine.preventDefault = true;
+        }
+      }
+      catch (e) {
+        Components.utils.reportError(e);
+      }
+    }
+    if (cmdLine.handleFlag("preferences", false)) {
+      openPreferences();
+      cmdLine.preventDefault = true;
+    }
+    if (cmdLine.handleFlag("silent", false))
+      cmdLine.preventDefault = true;
+
+    try {
+      var privateWindowParam = cmdLine.handleFlagWithParam("private-window", false);
+      if (privateWindowParam) {
+        let resolvedURI = resolveURIInternal(cmdLine, privateWindowParam);
+        handURIToExistingBrowser(resolvedURI, nsIBrowserDOMWindow.OPEN_NEWTAB, cmdLine, true);
+        cmdLine.preventDefault = true;
+      }
+    } catch (e) {
+      if (e.result != Components.results.NS_ERROR_INVALID_ARG) {
+        throw e;
+      }
+      // NS_ERROR_INVALID_ARG is thrown when flag exists, but has no param.
+      if (cmdLine.handleFlag("private-window", false)) {
+        openWindow(null, this.chromeURL, "_blank",
+          "chrome,dialog=no,private,all" + this.getFeatures(cmdLine),
+          "about:privatebrowsing");
+        cmdLine.preventDefault = true;
+      }
+    }
+
+    var searchParam = cmdLine.handleFlagWithParam("search", false);
+    if (searchParam) {
+      doSearch(searchParam, cmdLine);
+      cmdLine.preventDefault = true;
+    }
+
+    // The global PB Service consumes this flag, so only eat it in per-window
+    // PB builds.
+    if (cmdLine.handleFlag("private", false)) {
+      PrivateBrowsingUtils.enterTemporaryAutoStartMode();
+    }
+
+    var fileParam = cmdLine.handleFlagWithParam("file", false);
+    if (fileParam) {
+      var file = cmdLine.resolveFile(fileParam);
+      var ios = Components.classes["@mozilla.org/network/io-service;1"]
+                          .getService(Components.interfaces.nsIIOService);
+      var uri = ios.newFileURI(file);
+      openWindow(null, this.chromeURL, "_blank", 
+                 "chrome,dialog=no,all" + this.getFeatures(cmdLine),
+                 uri.spec);
+      cmdLine.preventDefault = true;
+    }
+
+#ifdef XP_WIN
+    // Handle "? searchterm" for Windows Vista start menu integration
+    for (var i = cmdLine.length - 1; i >= 0; --i) {
+      var param = cmdLine.getArgument(i);
+      if (param.match(/^\? /)) {
+        cmdLine.removeArguments(i, i);
+        cmdLine.preventDefault = true;
+
+        searchParam = param.substr(2);
+        doSearch(searchParam, cmdLine);
+      }
+    }
+#endif
+  },
+
+  helpInfo : "  --browser                                    Open a browser window.\n" +
+             "  --new-window <url>                           Open <url> in a new window.\n" +
+             "  --new-tab <url>                              Open <url> in a new tab.\n" +
+             "  --private-window <url>                       Open <url> in a new private window.\n" +
+#ifdef XP_WIN
+             "  --preferences                                Open Options dialog.\n" +
+#else
+             "  --preferences                                Open Preferences dialog.\n" +
+#endif
+             "  --search <term>                              Search <term> with your default search engine.\n",
+
+  /* nsIBrowserHandler */
+
+  get defaultArgs() {
+    var prefb = Components.classes["@mozilla.org/preferences-service;1"]
+                          .getService(nsIPrefBranch);
+
+    if (!gFirstWindow) {
+      gFirstWindow = true;
+      if (PrivateBrowsingUtils.isInTemporaryAutoStartMode) {
+        return "about:privatebrowsing";
+      }
+    }
+
+    var overridePage = "";
+    var haveUpdateSession = false;
+    try {
+      // Read the old value of homepage_override.mstone before
+      // needHomepageOverride updates it, so that we can later add it to the
+      // URL if we do end up showing an overridePage. This makes it possible
+      // to have the overridePage's content vary depending on the version we're
+      // upgrading from.
+      let old_mstone = Services.prefs.getCharPref("browser.startup.homepage_override.mstone", "unknown");
+      let override = needHomepageOverride(prefb);
+      if (override != OVERRIDE_NONE) {
+        switch (override) {
+          case OVERRIDE_NEW_PROFILE:
+            // New profile.
+            overridePage = Services.urlFormatter.formatURLPref("startup.homepage_welcome_url");
+            break;
+          case OVERRIDE_NEW_MSTONE:
+            // Check whether we have a session to restore. If we do, we assume
+            // that this is an "update" session.
+            var ss = Components.classes["@mozilla.org/browser/sessionstartup;1"]
+                               .getService(Components.interfaces.nsISessionStartup);
+            haveUpdateSession = ss.doRestore();
+            overridePage = Services.urlFormatter.formatURLPref("startup.homepage_override_url");
+            if (prefb.prefHasUserValue("app.update.postupdate"))
+              overridePage = getPostUpdateOverridePage(overridePage);
+
+            overridePage = overridePage.replace("%OLD_VERSION%", old_mstone);
+            break;
+        }
+      }
+    } catch (ex) {}
+
+    // formatURLPref might return "about:blank" if getting the pref fails
+    if (overridePage == "about:blank")
+      overridePage = "";
+
+    var startPage = "";
+    try {
+      var choice = prefb.getIntPref("browser.startup.page");
+      if (choice == 1 || choice == 3)
+        startPage = this.startPage;
+    } catch (e) {
+      Components.utils.reportError(e);
+    }
+
+    // Only show the startPage if we're not restoring an update session.
+    if (overridePage && startPage && !haveUpdateSession)
+      return overridePage + "|" + startPage;
+
+    return overridePage || startPage || "about:logopage";
+  },
+
+  get startPage() {
+    var uri = Services.prefs.getComplexValue("browser.startup.homepage",
+                                             nsIPrefLocalizedString).data;
+    if (!uri) {
+      Services.prefs.clearUserPref("browser.startup.homepage");
+      uri = Services.prefs.getComplexValue("browser.startup.homepage",
+                                           nsIPrefLocalizedString).data;
+    }
+    return uri;
+  },
+
+  mFeatures : null,
+
+  getFeatures : function bch_features(cmdLine) {
+    if (this.mFeatures === null) {
+      this.mFeatures = "";
+
+      try {
+        var width = cmdLine.handleFlagWithParam("width", false);
+        var height = cmdLine.handleFlagWithParam("height", false);
+
+        if (width)
+          this.mFeatures += ",width=" + width;
+        if (height)
+          this.mFeatures += ",height=" + height;
+      }
+      catch (e) {
+      }
+
+      // The global PB Service consumes this flag, so only eat it in per-window
+      // PB builds.
+      if (PrivateBrowsingUtils.isInTemporaryAutoStartMode) {
+        this.mFeatures = ",private";
+      }
+    }
+
+    return this.mFeatures;
+  },
+
+  /* nsIContentHandler */
+
+  handleContent : function bch_handleContent(contentType, context, request) {
+    try {
+      var webNavInfo = Components.classes["@mozilla.org/webnavigation-info;1"]
+                                 .getService(nsIWebNavigationInfo);
+      if (!webNavInfo.isTypeSupported(contentType, null)) {
+        throw NS_ERROR_WONT_HANDLE_CONTENT;
+      }
+    } catch (e) {
+      throw NS_ERROR_WONT_HANDLE_CONTENT;
+    }
+
+    request.QueryInterface(nsIChannel);
+    handURIToExistingBrowser(request.URI,
+      nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW, null);
+    request.cancel(NS_BINDING_ABORTED);
+  },
+
+  /* nsICommandLineValidator */
+  validate : function bch_validate(cmdLine) {
+    // Other handlers may use osint so only handle the osint flag if the url
+    // flag is also present and the command line is valid.
+    var osintFlagIdx = cmdLine.findFlag("osint", false);
+    var urlFlagIdx = cmdLine.findFlag("url", false);
+    if (urlFlagIdx > -1 && (osintFlagIdx > -1 ||
+        cmdLine.state == nsICommandLine.STATE_REMOTE_EXPLICIT)) {
+      var urlParam = cmdLine.getArgument(urlFlagIdx + 1);
+      if (cmdLine.length != urlFlagIdx + 2 || /firefoxurl:/.test(urlParam))
+        throw NS_ERROR_ABORT;
+      cmdLine.handleFlag("osint", false)
+    }
+  },
+};
+var gBrowserContentHandler = new nsBrowserContentHandler();
+
+function handURIToExistingBrowser(uri, location, cmdLine, forcePrivate)
+{
+  if (!shouldLoadURI(uri))
+    return;
+
+  // Unless using a private window is forced, open external links in private
+  // windows only if we're in perma-private mode.
+  var allowPrivate = forcePrivate || PrivateBrowsingUtils.permanentPrivateBrowsing;
+  var navWin = RecentWindow.getMostRecentBrowserWindow({private: allowPrivate});
+  if (!navWin) {
+    // if we couldn't load it in an existing window, open a new one
+    var features = "chrome,dialog=no,all" + gBrowserContentHandler.getFeatures(cmdLine);
+    if (forcePrivate) {
+      features += ",private";
+    }
+    openWindow(null, gBrowserContentHandler.chromeURL, "_blank", features, uri.spec);
+    return;
+  }
+
+  var navNav = navWin.QueryInterface(nsIInterfaceRequestor)
+                     .getInterface(nsIWebNavigation);
+  var rootItem = navNav.QueryInterface(nsIDocShellTreeItem).rootTreeItem;
+  var rootWin = rootItem.QueryInterface(nsIInterfaceRequestor)
+                        .getInterface(nsIDOMWindow);
+  var bwin = rootWin.QueryInterface(nsIDOMChromeWindow).browserDOMWindow;
+  bwin.openURI(uri, null, location,
+               nsIBrowserDOMWindow.OPEN_EXTERNAL);
+}
+
+function nsDefaultCommandLineHandler() {
+}
+
+nsDefaultCommandLineHandler.prototype = {
+  classID: Components.ID("{47cd0651-b1be-4a0f-b5c4-10e5a573ef71}"),
+
+  /* nsISupports */
+  QueryInterface : function dch_QI(iid) {
+    if (!iid.equals(nsISupports) &&
+        !iid.equals(nsICommandLineHandler))
+      throw Components.results.NS_ERROR_NO_INTERFACE;
+
+    return this;
+  },
+
+#ifdef XP_WIN
+  _haveProfile: false,
+#endif
+
+  /* nsICommandLineHandler */
+  handle : function dch_handle(cmdLine) {
+    var urilist = [];
+
+#ifdef XP_WIN
+    // If we don't have a profile selected yet (e.g. the Profile Manager is
+    // displayed) we will crash if we open an url and then select a profile. To
+    // prevent this handle all url command line flags and set the command line's
+    // preventDefault to true to prevent the display of the ui. The initial
+    // command line will be retained when nsAppRunner calls LaunchChild though
+    // urls launched after the initial launch will be lost.
+    if (!this._haveProfile) {
+      try {
+        // This will throw when a profile has not been selected.
+        var fl = Components.classes["@mozilla.org/file/directory_service;1"]
+                           .getService(Components.interfaces.nsIProperties);
+        var dir = fl.get("ProfD", Components.interfaces.nsILocalFile);
+        this._haveProfile = true;
+      }
+      catch (e) {
+        while ((ar = cmdLine.handleFlagWithParam("url", false))) { }
+        cmdLine.preventDefault = true;
+      }
+    }
+#endif
+
+    try {
+      var ar;
+      while ((ar = cmdLine.handleFlagWithParam("url", false))) {
+        var uri = resolveURIInternal(cmdLine, ar);
+        urilist.push(uri);
+      }
+    }
+    catch (e) {
+      Components.utils.reportError(e);
+    }
+
+    let count = cmdLine.length;
+
+    for (let i = 0; i < count; ++i) {
+      var curarg = cmdLine.getArgument(i);
+      if (curarg.match(/^-/)) {
+        Components.utils.reportError("Warning: unrecognized command line flag " + curarg + "\n");
+        // To emulate the pre-nsICommandLine behavior, we ignore
+        // the argument after an unrecognized flag.
+        ++i;
+      } else {
+        try {
+          urilist.push(resolveURIInternal(cmdLine, curarg));
+        }
+        catch (e) {
+          Components.utils.reportError("Error opening URI '" + curarg + "' from the command line: " + e + "\n");
+        }
+      }
+    }
+
+    if (urilist.length) {
+      if (cmdLine.state != nsICommandLine.STATE_INITIAL_LAUNCH &&
+          urilist.length == 1) {
+        // Try to find an existing window and load our URI into the
+        // current tab, new tab, or new window as prefs determine.
+        try {
+          handURIToExistingBrowser(urilist[0], nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW, cmdLine);
+          return;
+        }
+        catch (e) {
+        }
+      }
+
+      var URLlist = urilist.filter(shouldLoadURI).map(function (u) u.spec);
+      if (URLlist.length) {
+        openWindow(null, gBrowserContentHandler.chromeURL, "_blank",
+                   "chrome,dialog=no,all" + gBrowserContentHandler.getFeatures(cmdLine),
+                   URLlist);
+      }
+
+    }
+    else if (!cmdLine.preventDefault) {
+      // Passing defaultArgs, so use NO_EXTERNAL_URIS
+      openWindow(null, gBrowserContentHandler.chromeURL, "_blank",
+                 "chrome,dialog=no,all" + gBrowserContentHandler.getFeatures(cmdLine),
+                 gBrowserContentHandler.defaultArgs, NO_EXTERNAL_URIS);
+    }
+  },
+
+  helpInfo : "",
+};
+
+var components = [nsBrowserContentHandler, nsDefaultCommandLineHandler];
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);