50 TABS?! That’s incredible. I’ve never seen that many tabs open in my entire career as an IT engineer. I’m surprised it would run for more than 5 minutes let alone a week. My FF stays open between sleep (STR) sessions for 5 days and rarely eats up more than 400 MB.
If you want stable, try running any browser in “Privacy” mode where all add ons, browser plugins, etc. are disabled. It’s incredibly stable, regardless of browser, but it lacks function. Worst case, you could always go back to Lynx or Emacs.
If you're doing some research intensive stuff you can rack up three times that many following references around; especially if you want to "keep an eye" on where you get the papers you're investigating (some of them can be really difficult to find; like this paper).
If you want stable, try running any browser in “Privacy” mode where all add ons, browser plugins, etc. are disabled. It’s incredibly stable, regardless of browser, but it lacks function. Worst case, you could always go back to Lynx or Emacs.
Lynx is pretty cool; it would handle a lot of my basic user-cases, that is research aside.