Why is my Mozilla Firefox so slow?

[ebw]

Slimebeast said:

Actually sometimes I have started all over. I just start and close Firefox twice and then my "latest session" becomes completely wiped.

But now I have so much information I've built and I risk losing if I do that. I would not just feel empty if I wiped all this, I would get huge anxiety because I missed out on something important.

You seriously need a browser intervention.  Open tabs are not reliable for use as a persistent store, so you are living in a constant state of uncertainty and peril.  It's like saying "I have thousands of Microsoft Word documents open and I haven't saved any of them because I hate looking for files."  JUST LEARN TO USE BOOKMARKS!