Hi Liz! Are you experiencing the same missing bookmarks sidebar issue as described here?

If so, this issue will be resolved in the release of Firefox Version 139 -- this update will be available on May 27th. I hope this helps!

Hi Liz, when you can't create new bookmarks, it often indicates a problem with one of the database files used to store bookmarks/history and site icons. Before taking drastic action, you can check whether the built-in database maintenance function can fix it.

First, though, if you haven't already, please do a normal shutdown and/or restart of your system. Restarting Windows can help by freeing up locked files, completing any deferred updates, and resolving temporary file permission issues.

Next, if Firefox still has bookmark problems, could you let us know what you get when you run the "Verify Integrity" diagnosis and repair function. That's here:

Open Firefox's Troubleshooting Information page using any of these methods:

• "3-bar" menu button > Help > More Troubleshooting Information
• (menu bar) Help > More Troubleshooting Information
• type or paste about:support in the address bar and press Enter

Near the bottom, there is a section titled Places Database -- that's the file which stores history and bookmarks. Click the button labeled Verify Integrity. There may be a 10-15 second delay before results appear.

If all is well, the report that appears below the button should start with:

> Task: checkIntegrity
+ The places.sqlite database is sane
+ The favicons.sqlite database is sane
> Task: invalidateCaches
+ The caches have been invalidated
> Task: checkCoherence
+ The database is coherent

Does yours say that, or something else? You can select and copy the report, and then paste it into a reply for review and comment.

For future reference, if you are getting the error message in the title of the article: Fix "The bookmarks and history system will not be functional" error message.