Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

Learn More

forefox acting strange! browser size and position fluctuates

  • 4 个回答
  • 1 人有此问题
  • 19 次查看
  • 最后回复者为 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?

被采纳的解决方案

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?

定位到答案原位置 👍 0

所有回复 (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

选择的解决方案

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.