Migrate Firefox profile to a new one

I reinstalled Firefox, because my profile was crashing. I backed up my ~/.mozilla folder to some other place, uninstalled firefox and installed it again. New firefox wasn't crashing. So I copied one of my backup up old profile to new firefox, and that profile was crashing again. Now, I would like to use completely fresh profile and copy only the things that I need from the old profile that is crashing. Which files need I to replace? I need bookmarks (the quick access bar with bookmarks is sufficient for me and I need all the extensions with extension data). What could I also need and forget? I want to try it, I will at least find out, if it is some extension that's causing the crashes. But, I think it is not. It starts usually when I open a new tab and the page won't load. My OS is Lubuntu 18.04.6 LTS. Firefox version is 112.0.2 32 bit