The first step is to get to the Library window, formerly known as the Bookmarks Organizer or Bookmarks Manager before it was unified with history and downloads. Either:

• Ctrl+Shift+B
• "Show All Bookmarks" in various places

Then you have choices.

The native "backup" format is a hard-to-read JSON data file. More compact, and possibly slightly richer for restoring to Firefox. See: Restore bookmarks from backup or move them to another computer.

The classic "export" format yields the standard-ish bookmarks.html format file. See: Export Firefox bookmarks to an HTML file to back up or transfer bookmarks.

P.S. It would be a good idea to add a link to Bookmarking Tools, too.

Thank you! Now, in case of a disaster I hope it will restore properly if I have to reinstall. BTW, how do you bookmark the Bookmark Tools?

BTW, how do you bookmark the Bookmark Tools?

Sorry, my comment wasn't clear. It would be good if Mozilla added a link to the Library window to the Bookmark Tools so it will be easier to find.

Oh I see. Your comment was directed at Mozilla. I have to write this down someplace because I know I will forget.. Ctrl + Shift + B

Thanks!