This will restore the most recently closed tabs, whether it's just one or multiple. However, if you had multiple windows of several tabs open, you will need to do the key function for however many ...

As said, you can open multiple tabs at once by selecting the same option. Although it is not possible to restore Incognito browser tabs/windows, you can find and open them in the History panel.

Launch Firefox Click the menu button to open the Menu panel Click History Select Restore Previous Session. This will get back your tabs and windows from a previous browsing session. Launch Mozilla ...