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Firefox will not allow me to revert to an older version.

  • 3 回覆
  • 1 有這個問題
  • 17 次檢視
  • 最近回覆由 jscher2000

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When I was using version 88.x, Firefox had not crashed for years. Then all of a sudden, Firefox would crash several times a day. I looked and Firefox had updated me to ver 89.0. But I let it ride. Then Firefox about a month ago, Firefox stsrted to crash EVERY DAY. Then one day it crashed EIGHT TIMES IN A ROW and I mean when I hit RESTART, IT WOULD CRASH. I tried to revert to rel 88 but Mozilla WILL NOT ALLOW US TO REVERT BACK TO A PREVIOUS VERSION. When you do, the PROFILE gives you TWO OPTIONS: 'EXIT or CREATE A NEW PROFILE.' Certainly you do not want to CREATE A NEW PROFILE as you will LOSE, your history, add-ons, Bookmarks, EVERYTHING and you see a WHITE Firefox screen with nothing. So I choose EXIT and tried to put up with the CRAPPY ver 89. BUT FIREFOX KEPT CRASHING. TODAY IT CRASHED SIX TIMES IN A ROW......When I checked the VERSION, YOU HAD UPGRADED TO VER 91.0b6 (64-bit) AND IT IS NO BETTER.

WHAT IN THE HECK IS GOING ON. I DO NOT WANT TO LEARN CHROME OR EDGE AS I HAVE USED FIREFOX SINCE VERSION 1.0.

DOES ANYONE KNOW HOW TO GO BACK AND KEEP YOUR OLD PROFILE, FLACKY OR NOT AS THAT IS BETTER THAN 'RESTARTING' FIREFOX ALL THE TIME.

MY VERSION 88 NEVER FAILED.

所有回覆 (3)

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

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


While still in Troubleshoot(Safe) Mode,


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 +++++++++++++++++++++++++++ If you can't get Firefox to open, you will have to do this the hard way. https://support.mozilla.org/en-US/kb/mozillacrashreporter

Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted Win 10: Press <Windows> + R on the keyboard. A Run dialog will open. In the Run dialog, type %APPDATA%\Mozilla\Firefox\Crash Reports\submitted <Enter>


Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the most Recent 5-7 File Names in the folder. Press the Reply button. Now go to the reply box and paste them in.

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Note that you are currently on the Beta update channel and not on the stable release. There are ways to make it possible to downgrade a profile and allow it to run with older Firefox version, but this isn't advised when you run developer builds that may have experimental software enabled via its settings.


Safest is to uninstall the 91.0 beta and install the current 90.0.2 release and create a new profile.

You can copy certain files with Firefox closed to the current profile folder to transfer or recover personal data. Note that best is to avoid copying a full profile folder.


  • bookmarks and history: places.sqlite
  • favicons: favicons.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (encrypted logins;32+) and key4.db (decryption key;58+) for Passwords saved in the Password Manager
    key3.db support ended in 73+; to use key3.db in 58-72, make sure to remove key4.db
  • cert9.db (58+) for (intermediate) certificates stored in the Certificate Manager
  • persdict.dat for words added to the spell checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)

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

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The user who posted this question continued here: https://support.mozilla.org/questions/1345032