In case you're mad at yourself for closing your precious window with all the right tabs opened, note that Firefox allows to reopen recently closed windows
I generally have a "home" Firefox window with my most used tabs pinned. Sometimes I close it before another window, so I was frustrated to "lose" it and having to redo my pins. But recently I discovered this feature. Joy!
The whole point of bookmarks is that they are saved sites so why would they automatically delete them? Also just click on Manage Bookmarks or Manage History and you can delete anything from thereā¦ If you donāt want history to be saved then use a private window.