[mitultiwari]

It must be your extensions. Disable all extensions and try FF.

I use FF all the time with 10s of tabs open, and I don't have any issues with stability. My FF window is open for days and some time for weeks.

[51Cards]

Agreed.. I restart FF maybe once a week and most of the time it's sitting open with 10-15 tabs. If you're having stability issues with FF it's a plugin IMO.

[CWuestefeld]

I'm sure it is an extension. The thing is, I can't easily figure out which one. Since it takes a couple of hours for the problem to occur, it's too much of a big deal to try a binary search of all extensions to figure it out.

Compare to Chrome, which has its own task manager, which shows CPU and RAM usage of each extension.

[ajanuary]

I remember reading that FF now has something similar. It might be in the nightly or a plugin or something though. Unfortunately I can't find it now :( Sorry