Well I'm still using Firefox Mobile. I've tried a few others, none of them made the grade for me. Brave was recommend to me, I'm just not that Brave.
I want Sync (Bookmarks) and also plugins (notably uBlock Origin). I do most of my browsing on my computer anyway. On Mobile, it's primarily as a pocket brain for searching and occasionally for Facebook (I don't like the App).
I did try Edge. It went like this: downloading... installing... open... YIKES!!... close... uninstall. LOL
Still can't see a use for this tab collections thing.