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Is there any way I can backup all extensions and extension data and import it into other profiles, or import it back after refreshing Firefox?

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  • 最後の返信者: cor-el

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Within the past few days, I've noticed Firefox act buggy and then got the message “The bookmarks and history system will not be functional … ” so I deleted my profile like it said so here. I had backed up all my extension settings beforehand, but it would be more convenient to backup and import them all at once with one or a few clicks.

Within the past few days, I've noticed Firefox act buggy and then got the message “The bookmarks and history system will not be functional … ” so I deleted my profile like it said so [https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional here]. I had backed up all my extension settings beforehand, but it would be more convenient to backup and import them all at once with one or a few clicks.

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Well I was hoping for a solution other than copy and pasting profile folders, and just backup extension data.

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There is no need to delete the full profile folder to solve this issue with the bookmarks, you merely need to rename/remove places.sqlite and favicons.sqlite.


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

this could be a problem with the places.sqlite and favicons.sqlite files in the Firefox profile folder.

  • use the "Places Database" -> "Verify Integrity" button on the "Help -> More 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 the most 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
  • you lose the history when a new places.sqlite is created

You may have to restore an older bookmarks backup in the bookmarkbackups folder via the Bookmarks Manager (Library).

See also:

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 (Root directory).