Why is the option to open the last firefox session not available anymore ?

Have you enabled private browsing? It will delete history. https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history

No. It shows:

• recently closed tabs
• recently closed windows

but not (anymore):

• open the last session.

Moderator note: This reply has been edited to correct the formatting.

I know what you mean, but 'i don´t want to open the last session automaticly' !! I want to have the option ! It ALLWAYS worked. And yes, it is possible when i click click Chronic -> recently closed windows. There are stored the last few sessions, but it allways opens it in a new window (so stoopid). Cause then i have to close the emty window. So many unnecessary clicks ! This is really not what i want...

Hi,

This option is still available:

• In the Firefox menu (History > Restore Previous Session)
• In the menu bar (History > Restore Previous Session)

If it doesn't work for you, that would be a different issue.