Reply To: Benefit of resetting firefox to default
Well, you could try it. It seems when I did that, maybe it saved everything it disabled to an icon on the desktop so you could restore it. (Or, was that when I tried it in their SAFE mode?)
Wherever your HELP menu is, there should be a Troubleshooting Information item. Clicking on that will bring up a page with with a place you can click to reset things.
Seems to me when I did that I lost all my history and other settings I had made.
Maybe you might, instead, consider just disabling all the add-ons and such you might have added.
Or, take a look for a browser called Pale Moon. It is really a slightly older version of FF, and maybe without as much stuff packed under the hood.
I find many things run better with the Google Chrome browser. You might also give that a whack and see which browser fits your fancy.