Description of problem:
In Firefox 38.0 on Fedora 20, double-clicking on an empty area of the tab bar opens a new tab. This no longer works in Fedora 21 or 22, which have Firefox compiled against GTK3 instead of GTK2.
Version-Release number of selected component (if applicable):
38.0, in Fedora 22 and 21 (not in Fedora 20)
Fedora 21 is Gtk2.
Sorry, I realized that but forgot to correct this bug. Since it is the same version of Firefox in F20 through F22, I assumed this was yet another GTK3 issue, but I guess there's some other difference that started in F21....
Hm, I can't reproduce this one on Fedora 22. Could you try to check with fresh profile and/or in safe mode (by firefox -safe-mode)? Thank you.
Same result in fresh profile and in safe mode.
If it's relevant, I'm using the Mate Desktop Environment.
I notice that the cursor changes to the grabbing hand while double-clicking. If I press down and hold the mouse button, it remains the hand and if I then move the mouse the window is restored (unmaximized) and drags around the screen. The issue seems to be that gtk3 considers this to be a draggable area of the window. I will attach a screen capture showing the cursor when I click and hold ...
Created attachment 1042768 [details]
cursor changes to grab hand when click
I can't reproduce, Fedora 22, MATE.
Just checking that you each understand that I am not talking about clicking on the new tab button, but instead I am talking about double-clicking on an empty area of the tab bar.
I can reproduce this issue 100% of the time in the F22 Mate Spin Live CD, without any changes to any settings. It is very confusing if you are not able to reproduce under those conditions.
Surprisingly double click doesn't work if you don't use Persona theme. I'm able to reproduce it now.
I can reproduce this with
1. a clean, fresh profile (38.0.x and 39.0.x)
2. a long-used profile (38.0.x and 39.0.x)
3. tor browser 5.0a3 (based on Mozilla Firefox 38.1.0)
I think this has been so for a while.
Finally able to reproduce with Bluebird theme. It's related to theme and it depends on -GtkWidget-window-dragging: true;
Workaround is to put:
We're going to track this issue on upstream: https://bugzilla.mozilla.org/show_bug.cgi?id=1224206