Important UserData

Seriously?

20 symbols for the title? I can’t put just 4 words in title: “YouTube comments aren’t loading.”

I tried to turn off all of the extensions and clean all cookies and cache, but the problem still persists. That problem occurs only in Kinza
The problem – on YouTube comments are loading infinitely. What can I try to do to solve the problem (except reinstalling the browser)?

Post Scriptum. I reinstalled the browser and everything works fine, but if I put my UserData back, comments got broken again.
What UserData I should save to save my settings, bookmarks, extensions and everything important? I want to delete all junk in userdata, but save important things