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/* 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/. */
/* Auto-recovery module.
* This module aims to catch fatal browser initialization errors and either
* automatically correct likely causes from them, or automatically restarting
* the browser in safe mode. This is hooked into the browser's "onload"
* event because it can be assumed that at that point, everything must
* have been properly initialized already.
*/
var Cc = Components.classes;
var Ci = Components.interfaces;
var Cu = Components.utils;
// Services = object with smart getters for common XPCOM services
Cu.import("resource://gre/modules/Services.jsm");
var browser_autoRecovery =
{
onLoad: function() {
var nsIAS = Ci.nsIAppStartup; // Application startup interface
if (typeof gBrowser === "undefined") {
// gBrowser should always be defined at this point, but if it is not, then most likely
// it is due to an incompatible or outdated language pack being installed and selected.
// In this case, we reset "general.useragent.locale" to try to recover browser startup.
if (Services.prefs.prefHasUserValue("general.useragent.locale")) {
// Restart automatically in en-US.
Services.prefs.clearUserPref("general.useragent.locale");
Cc["@mozilla.org/toolkit/app-startup;1"].getService(nsIAS).quit(nsIAS.eRestart | nsIAS.eAttemptQuit);
} else if (!Services.appinfo.inSafeMode) {
// gBrowser isn't defined, and we're not using a custom locale. Most likely
// a user-installed add-on causes issues here, so we restart in Safe Mode.
let RISM = Services.prompt.confirm(null, "Error",
"The Browser didn't start properly!\n"+
"This is usually caused by an add-on or misconfiguration.\n\n"+
"Restart in Safe Mode?");
if (RISM) {
Cc["@mozilla.org/toolkit/app-startup;1"].getService(nsIAS).restartInSafeMode(nsIAS.eRestart | nsIAS.eAttemptQuit);
} else {
// Force quit application
Cc["@mozilla.org/toolkit/app-startup;1"].getService(nsIAS).quit(nsIAS.eForceQuit);
}
}
// Something else caused this issue and we're already in Safe Mode, so we return
// without doing anything else, and let normal error handling take place.
return;
} // gBrowser undefined
// Other checks than gBrowser undefined can go here!
// Remove our listener, since we don't want this to fire on every load.
window.removeEventListener("load", browser_autoRecovery.onLoad, false);
}
};
window.addEventListener("load", browser_autoRecovery.onLoad, false);
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