1248903 - High-Level APIs Windows brokens in private mode

Status: RESOLVED INCOMPLETE

(Add-on SDK Graveyard :: General, defect)

Description

[zepeuj]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0
Build ID: 20160210153822

Steps to reproduce:

The problem can be reproduce with this simple code:

const windows = require("sdk/windows").browserWindows;

windows.on("activate", function(window) {
    console.log("A window was activated.");
    console.log("Active window title: " + windows.activeWindow.title);
    
    // => tabs length is always 0 !!!!
    console.log("Active window tabs length: " + windows.activeWindow.tabs.length);
});


windows.on("open", function(window) {
        // => event not detected
	console.log("window open");
});

const tabs = require('sdk/tabs');

tabs.on("activate", function (tab) {
    console.log("A tab was activated.");
    try {
        console.log("Active window tabs length: " + tab.window.tabs.length);
    }        
    catch (e) {
        // => exception because the window associated to the tab is null !!!
        console.log(e);
    }
});

Of course the following key must be set in the package.json file of the add-on:
"permissions": {"private-browsing": true}

To reproduce the problem Firefox must be STARTED with a private window.


Actual results:

So the problems:
* The private window opened is not detected by the "open" event
* The active window cannot list the tabs.
* The active tab cannot get the associated window.

Important: this only happens if Firefox STARTS with a private window.

If another private window is opened, the problem doesn't happen with this window.
If Firefox is started in normal mode and a private window is opened, the problem doesn't happen with this private window.


Expected results:

The expected behavior is the same than with not private windows.

Comment 1

[Croydon]

Seems to be a duplicate of #1196577

Comment 2

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1399562