This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Window will no longer resize after recent update

  • 3 replies
  • 1 has this problem
  • 7 views
  • Last reply by sfhowes

more options

The primary multi-pane viewing window will not resize after the latest update (no diagonal arrow when hovering over lower right corner, no other apparent control to resize vertical or horizontal).

All I can do is switch between full screen, and what was apparently my last saved smaller size (not very much smaller than full screen), but I would greatly prefer to make this application occupy only half a screen (top half of a vertical split), as is my usual layout for multitasking.

I've tried Safe Mode, Toolbar reset, and also disabling all Add-ons (only using 2 presently), etc., but the problem persists throughout.

The primary multi-pane viewing window will not resize after the latest update (no diagonal arrow when hovering over lower right corner, no other apparent control to resize vertical or horizontal). All I can do is switch between full screen, and what was apparently my last saved smaller size (not very much smaller than full screen), but I would greatly prefer to make this application occupy only half a screen (top half of a vertical split), as is my usual layout for multitasking. I've tried Safe Mode, Toolbar reset, and also disabling all Add-ons (only using 2 presently), etc., but the problem persists throughout.

All Replies (3)

more options

If you right-click the taskbar, Show windows stacked, are the windows still not sizeable? Try also opening the profile folder from Help/Troubleshooting, click Open Folder, close TB, and delete session.json.

more options

Thank you for the quick advice, unfortunately neither stacked windows nor the profile "session.json" file deletion/relaunch solved the issue. All other program windows do scale properly, but Thunderbird doesn't present the option.

more options

Try this: Help/Troubleshooting, about:profiles, create a new profile and launch it. This profile won't have any data, and there's no need to add an account, but see if the window resizes as expected.