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

Firefox continues to stretch like it's going into fullscreen, going back, and then freezing entirely

  • 2 replies
  • 1 has this problem
  • 6 views
  • Last reply by FredMcD

more options

I don't know quite how to explain the problem I keep having. After upgrading to 91.0 ESR, the problem I had with regular Firefox has happened once again. The problem I keep having is that the browser will stretch like it's going into Full Screen for a second, snap back, and then stretch up again before freezing and crashing entirely, that is, if it doesn't hold on the fake fullscreen and turn off my monitor, making me have to restart my PC entirely.

I also notice that this newest version freezes more than usual overall.

Can someone explain what the problem is and how to fix it, or if Mozilla's going to fix it in the next update?

Thank you!

I don't know quite how to explain the problem I keep having. After upgrading to 91.0 ESR, the problem I had with regular Firefox has happened once again. The problem I keep having is that the browser will stretch like it's going into Full Screen for a second, snap back, and then stretch up again before freezing and crashing entirely, that is, if it doesn't hold on the fake fullscreen and turn off my monitor, making me have to restart my PC entirely. I also notice that this newest version freezes more than usual overall. Can someone explain what the problem is and how to fix it, or if Mozilla's going to fix it in the next update? Thank you!

All Replies (2)

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

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP- in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most recent 7 - 10 Submitted crash reports, and copy them. Now go to the reply box and paste them in.

Please, Do not post a screenshot ! !

aboutcrashesFx57

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support