Public bug reported:
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:91.0)
Gecko/20100101 Firefox/91.0
Steps to reproduce:
Open Downloads panel, Library or Application menu form the Toolbar by
clicking on the corresponding icons.
Actual results:
From version 90 I noticed that Library or other items in the Toolbar
won't open when I click it. Instead it flickers a few times on mouse
movement - it looks like it opens but it's not visible, it becomes
visible a fraction of a second when I move the mouse otherwise it's
completely transparent.
Which Toolbar icon this affects seems random. I tried to fix it by
resetting the Toolbar and disabling extensions which have icons in the
Toolbar. Then I noticed that Library was working normal again but
Downloads or Application Menu wouldn't open.
When this happened with the Application Menu I could barely see the
contents of the menu by moving the mouse which made the menu flicker.
The cursor was able to select menu items in the menu but it was
completely transparent.
In the enclosed screenshot you can see I selected the Library menu item
but it isn't opened.
Expected results:
The menus in the Toolbar should open like they used to.
** Affects: firefox (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1940417
Title:
In Firefox Random Toolbar menus (Library, Downloads Panel, Application
Menu, etc.) won't open
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