Firefox Tekoha Aty

Am I understanding this correctly?

HTML backup (bookmarks) doesn't support tags and annotations, but JSON backup does, and JSON backup doesn't preserve the website favicons, but HTML backup does?  

So, what I can do, is restore my (saved) bookmarks using JSON backup, then restore the HTML backup, this would get my tags and annotations, and the website favicons back? But the downside, I will need to remove duplicates?

I had issues with my computer which got me into a situation where i had to delete all partitions of my drives, starting from 0. Signing in my firefox account in a fresh win install suddenly recovers NOTHING and i am now panicking as i had very important accounts & passwords, bookmarks, tabs, extensions, etc. I have tried other devices too without any luck. I need help recovering all these asap.

My potato pc(amd A8-7600, 8G ram, rx560 2G) is not capable of YouTube vp9 hardware acceleration, but I played 1080p 60fps videos without difficulty using add-ons that force h264 decoding, but the videos started stuttering a while ago. At first, I thought it was add-ons problem, but other than YouTube, too

I used the translation app because I was not good at English

Tired of the bullying tactics of Microsoft forcing me to accept Microsoft Edge when all I want is Google Chrome, so I'm thinking of making Mozilla my default browser, but I'm concerned about whether Mozilla will tranfer all my info. I sell the occasional bits on Etsy and Ebay. I had found the perfect tool to edit my photos on Chrome. Now this has gone haywire because I am forced into using Edge, which does not give me anything like the editing choices I have on Chrome. I have followed all the directions given by Microsoft to get off Edge and back into Chrome but they have all failed miserably, so I am trapped in Edge and all my efforts are turning into Groundhog Day ! Also if I return to Firefox, what will happen to all my photos, and the folders they are kept in ? As an 86 year old, I need clear, concise directions on how I can restore everything I need to be able to return to a browser I was completely comfortable with. Please advise.