XUL/Firefox: create new browser window on addon load -


i'm developing bootstrapped firefox addon. in startup function constructing new instance of object, creates new firefox window following code:

function createwindow (cb) {     const apphiddenwindow = services.appshell.applicationprovidedhiddenwindow         , hidden = services.appshell.hiddendomwindow;      // definition of openbrowserwindow() see     //   http://mxr.mozilla.org/mozilla-central/source/browser/base/content/browser.js     // prior firefox 20 "private" option silently ignored     let parent = apphiddenwindow ? hidden : recentwindow.getmostrecentbrowserwindow()       , window = parent.openbrowserwindow({ private: true });     window.addeventlistener("load", onwindowload);     return window;      function onwindowload (e) {         window.removeeventlistener("load", onwindowload);         window.gbrowser.addeventlistener("pageshow", onpageshow);     }      function onpageshow (e) {         dump("onpageshow\n");         try {             cb(window);         } catch (e) {}     } }

for unknown me reasons code behaves differently in different circumstances: on firefox prior 20 if being executed on app startup, onpageshow callback never fires. assume because gbrowser's selectedbrowser doesn't load homepage , stops after about:blank has loaded. why load homepage in new window when reactivate extension manually (when firefox loaded already)?

trouble appears when yet loads homepage selectedbrowser (in newer fx versions): in case doesn't start loading url, specified me , instead continues load homepage.

so how can determine if gbrowser gonna load homepage or not? , why behave differently on app startup , on addon reactivation?

ps: above code work 1 must these imports , use following fallback:

cu.import("resource://gre/modules/services.jsm"); try {     cu.import("resource:///modules/recentwindow.jsm"); } catch (e) { // firefox prior v20     var recentwindow = {         getmostrecentbrowserwindow: function ()             services.wm.getmostrecentwindow("navigator:browser")     }; }

it seems wrong in of assumptions. don't have wait until pageshow event. after long research found bug. according there observer notification browser-delayed-startup-finished enough start doing things had window.


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