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.

Mozilla Support में खोजें

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

forefox acting strange! browser size and position fluctuates

  • 4 प्रत्युत्तर
  • 1 यह समस्या है
  • 21 views
  • के द्वारा अंतिम प्रतियुतर FredMcD

more options

I've been using firefox as my default browser since it started, but yesterday it started getting weird. I open the browser and rather than open to the size of my monitor it opened to 1/4 size, next time I opened the browser it opened normally, next time 1/4 size and so on. I've looked at settings and it looks ok (not that I've changed anything recently) When it opens 1/4 size I click the top right to open full size and the 1/4 size browser moves from te left side to the right, the I click the top right full screen and it opens full screen with tools. Really weird! Has there been a screwy update?

I've been using firefox as my default browser since it started, but yesterday it started getting weird. I open the browser and rather than open to the size of my monitor it opened to 1/4 size, next time I opened the browser it opened normally, next time 1/4 size and so on. I've looked at settings and it looks ok (not that I've changed anything recently) When it opens 1/4 size I click the top right to open full size and the 1/4 size browser moves from te left side to the right, the I click the top right full screen and it opens full screen with tools. Really weird! Has there been a screwy update?

चुने गए समाधान

Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh).


Do this several times in a row (open/close/open/close). Is the problem still there?

संदर्भ में यह जवाब पढ़ें 👍 0

All Replies (4)

more options

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved You may have corrupt xulstore.json file.

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/Profiles
  • Linux: *~/.mozilla/firefox/Profiles
  • Windows: %AppData%\Mozilla\Firefox\Profiles
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles
  • Windows XP: C:\Documents and Settings\<user>\Application Data \Mozilla\Firefox\Profiles\

Search for the above file. Then rename or delete it. Restart Firefox.

more options

चयनित समाधान

Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh).


Do this several times in a row (open/close/open/close). Is the problem still there?

more options

Thanks Fred, but neither suggestions fixed the issue. Deleting Windows: %AppData%\Mozilla\Firefox\Profiles stopped firefox opening, so I opened the recycle bin and restored the files.

I tried the safe mode as suggested, but that didn't fix it. In the end I "refreshed" Firefox and that did the trick. I think I did click the troubleshoot mode to get to it? Thanks for the Help Fred, you steered me in the right direction.

more options

steve388 said

Deleting Windows: %AppData%\Mozilla\Firefox\Profiles stopped firefox opening

My instructions were to delete the xulstore.json file. Not the folder.


In the end I "refreshed" Firefox and that did the trick.

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems. Go to that post and click the 'Solved' button to its right.