I have a number of tabs open, which never used to be an issue, but lately, Firefox continally tries to load these tabs, and causes the program to crash.

I have a large number of tabs open on Firefox, and while this had never been a problem before, all of the sudden, the program crashes. What happens is that when I get the tabs loaded, Firefox will attempt to reload these tabs, which it had not done in the past, and because of so many tabs trying to reload, it crashes the program. Also, when I click on a tab, it reloads it as well, again, something that had never happened in the past. I need to know what I can do to stop this from happening, so I can once again enjoy using Firefox.