Why is my Mozilla Firefox so slow?

[Slimebeast]

SpokenTruth said:

Slimebeast said:
The catastrophe has happened!

It seems some website was able to open a pop-up window or something despite me having Adblock on at all times, because the next time I opened Firefox and clicked on "Restore previous session" it turned up completely empty. All my ~300 tabs were gone!! (I had reduced the number of tabs quite a lot since the my last post in this thread)

Damn it, so much work lost. So much valuable information completely gone.

This happened less than a week ago. I have already worked myself up to 135 open tabs again.

Why didn't you right click a tab and bookmark them all as I suggested?

Damn it! I guess I forgot? I bookmarked a lot of them though, but one by one. What should I call the folder if I bookmark them all by right clicking?