Bookmark Backups

Type about:support in the address bar and press enter.

Under the page logo on the left side you will see Application Basics. Under this find Profile Folder. To it’s right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Enter the bookmarkbackups folder. This is where Firefox makes backups of your bookmarks. Look for the jsonlz4 file you want to restore (check the time / date / size). Right click on that file and select Copy. Now go back to the profile folder where you started. Rename the file places.sqlite by adding .old to it. Now right click in the folder and select Paste. The file you just pasted here, rename it to places.sqlite. After you are done, restart Firefox.

Edited to correct file name error.

These can't get your data back, but will help in the future.

These add-ons can be a great help by backing up and restoring Firefox

FEBE (Firefox Environment Backup Extension) {web link} FEBE allows you to quickly and easily backup your Firefox extensions, history, passwords, and more. In fact, it goes beyond just backing up -- It will actually rebuild your saved files individually into installable .xpi files. It will also make backup of files that you choose.

OPIE {web link} Import/Export extension preferences

I followed the instructions above from Fred McD to the letter (about copying & pasting the back-up files etc), but it has not worked. ALL of my bookmarks apart from the bookmarks toolbar have VANISHED. I am actually really furious with Firefox; WHY are they issuing updates that remove our bookmarks? This is totally irresponsible. I do back them up myself but I cannot do this every days, & in the past month since the last back up I have added a huge number of important websites. How do I actually stop Firefox from automatically updating? I would prefer it NOT to update if this is going to happen.

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Update. Check the settings.

Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Check your bookmarks. Are there any problems?

Then restart.