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Constantly have to force quit, cannot clear history, etc

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Hello,unfortunately I am not the most computer savvy person (sorry). I have been experiencing a few problems with Firefox over the last month or so. I currently use a Mac desktop and a Macbook and they sync together. I keep Firefox up to date as updates become available. My Macbook is fine but on my desktop I frequently have to Force Quit the application. In addition, I cannot clear my browsing history, cannot add a new bookmark nor able to delete a bookmark. I thought at first that maybe a bookmark I added may have caused a problem (?) on my desktop but the problem did not transfer over to my laptop upon syncing. I was thinking of uninstalling Firefox and reinstalling it but I wanted to get an expert opinion. Is there a fix for this problem, have I done something wrong? As well, in your opinion are ad blocking applications such as 'ADBLOCK' or 'U BLOCK ORIGIN' compatible with Firefox / Apple Mac? Thank you in advance for any assistance you can give me, and thank you for continually delivering a superior browser!

Hello,unfortunately I am not the most computer savvy person (sorry). I have been experiencing a few problems with Firefox over the last month or so. I currently use a Mac desktop and a Macbook and they sync together. I keep Firefox up to date as updates become available. My Macbook is fine but on my desktop I frequently have to Force Quit the application. In addition, I cannot clear my browsing history, cannot add a new bookmark nor able to delete a bookmark. I thought at first that maybe a bookmark I added may have caused a problem (?) on my desktop but the problem did not transfer over to my laptop upon syncing. I was thinking of uninstalling Firefox and reinstalling it but I wanted to get an expert opinion. Is there a fix for this problem, have I done something wrong? As well, in your opinion are ad blocking applications such as 'ADBLOCK' or 'U BLOCK ORIGIN' compatible with Firefox / Apple Mac? Thank you in advance for any assistance you can give me, and thank you for continually delivering a superior browser!

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It is possible that there is a problem with the places.sqlite database that stores bookmarks and history.

If you use Sync then best is to disconnect Sync temporarily during troubleshooting.

This can be caused by a problem with the places.sqlite and favicons.sqlite databases in the Firefox profile folder.

  • use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page

If errors are reported with "Verify Integrity", close and restart Firefox or reboot and retry.

If "Verify Integrity" cannot repair places.sqlite, rename/remove all places.sqlite and favicons.sqlite files in the Firefox profile folder with Firefox closed. Firefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder.

  • keep a backup copy of places.sqlite in case a new places.sqlite database has to be created

See also:

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.