Finally coaxed Firefox into recognising this! Works quite nicely so far! I like the ability to create sub-folders, so I can really organise my bookmarks according to how I use them!

It's nice that there are generic graphics per folder, though I'd prefer that the folders showed thumbnails from the pages they contain

i cant get any bookmarks visual so far

zero

I can't do anything in Firefox 63... It seem like bugged...

error

Не работает нормально.