Join us to show up for other Firefox users 🦊. Earn fun badges and Mozilla swag vouchers! Find out more: https://mzl.la/askafox150

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox Developer 62.0b1 not opening to last window size on Windows 10 or Linux Mint 18.3

  • 4 replies
  • 1 has this problem
  • 54 views
  • Last reply by cor-el
  • Archived

uhav2Laf
uhav2Laf

Hi, for a few weeks now Firefox Developer does not re-open in its last window size. Instead it opens to a smaller rectangle about one third of my 1920x1200 screen. It's not serious but something is obviously wrong and it would be nice to have it working like Chrome and Opera.

Hi, for a few weeks now Firefox Developer does not re-open in its last window size. Instead it opens to a smaller rectangle about one third of my 1920x1200 screen. It's not serious but something is obviously wrong and it would be nice to have it working like Chrome and Opera.

All Replies (4)

WestEnd
WestEnd

If your not bug fixing or testing beta isn't to be used as daily Browser.

Shadow110
Shadow110

Hi, yes it would, but am deflecting the above as do not know and am off.

uhav2Laf
uhav2Laf Question owner

WestEnd said

If your not bug fixing or testing beta isn't to be used as daily Browser.

Thanks for the reply. I have just installed the latest stable Firefox but unfortunately it still has the same problem as the developer. Firefox still opens to a smaller size than the way I left it.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor

Try to rename/remove xulstore.json and if present delete localstore.rdf in the Firefox profile folder with Firefox closed.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.