Public bug reported:
Binary package hint: firefox
The globalmenu extension overlays browser.xul and loads firefoxMenu.js, adding
a lot of new variables/functions to the shared scope, at least:
nsIObserverService !
uIGlobalMenuLoader
uIGlobalMenuService
observer !
Observer() !
onLoad() !
onUnload() !
PlacesMenuUnityImpl()
HistoryMenuUnityImpl()
(! marks names with high chance of conflicts)
This is a problem as the regular browser code, all other extensions overlaying
the browser window and this extension share the same scope, i.e. the same
namespace.
If other extensions happen to define the same scope-global names, then
conflicts will occur. Whoever loads last wins. Hence there is a high
probability of heisenbugs (depending on the other extensions a user installs).
I'm a volunteer addons.mozilla.org editor, performing required code reviews an
extension, this would be a definite show-stopper bug to any public listing.
You can either "hide" your stuff within a function, use some "namespace"
variable, or a mixture of both, e.g.:
if (!com) var com = {};
if (!com.canonical) com.canonical = {};
(function() {
// local/"hidden" stuff
function load() {
removeEventListener("load", load, false);
...
}
addEventListener("load", load, false);
// globally visible
this.Unity = { // |this| is com.canonical
PlacesMenuUnityImpl: ...
};
}).call(com.canonical);
(in the xul overlay you would then change all references to
PlacesMenuUnityImpl to com.canonical.Unity.PlacesMenuUnityImpl)
Also see:
https://developer.mozilla.org/en/XUL_School/JavaScript_Object_Management
** Affects: globalmenu-extension
Importance: Undecided
Status: New
** Affects: firefox (Ubuntu)
Importance: Undecided
Status: New
** Also affects: globalmenu-extension
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/767966
Title:
globalmenu extension pollutes main window javascript scope
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