Score:1

Firefox, Unwanted "window in window" upon first instance of firefox starting

jp flag

When opening a single instance of Firefox, I get a "window within a window" (see screenshot below). Both sets of minimize/maximize/close buttons perform the same for the double windowed browser. Both browsers are fully functional otherwise.

  • If I drag a tab out of this and create a window, the problem goes away.
  • If I launch Firefox after restarting the system, the problem still persists.
  • If I launch a second instance of Firefox with original window still open, problem does NOT persist on 2nd window.
  • Manually closing ALL tabs (vs. just closing the window) and reopen Firefox, this behavior continues to exist (and I can still recover tabs with ctrl+shift+t)

My best guess is this may have something to do with automatic tab recovery/ the first instance of Firefox starting on the device at a given time, but I have no idea why this behavior exists. Thanks for any ideas!

Window in Window Firefox issue

Desired Firefox window behavior

Description:    Ubuntu 20.04.3 LTS
Release:    20.04
Codename:   focal

(MATE)

Firefox for Ubuntu ver. 92.0
vanadium avatar
cn flag
Problem with the Mate window manager or compositor? Check "More tools" - "Customize toolbar...": does the problem persist if you check "titlebar" on the last line (or turn it off)?
mangohost

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