The entire Library, Bookmarks/History/the archaic Downloads popup, all just makes me immensely sad. Meanwhile I keep seeing more badges (Pocket, Screenshots, Lockwise, etc) crap popping up in the browser UX...
To add on to what you're pointing out -- they even cloned Chrome's "profile-icon-in-the-bar" model, but didn't actually give you the ability to switch profiles with it! Instead more places to shove more links that I forgot about - Firefox Monitor and Firefox Send.
The history and bookmark management also has some unfortunate performance issues. I'm fairly certain there's a memory leak or something as well, as deleting several thousand entries at once (say, via 'forget this site' menu options) effectively breaks the browser until restart even when it has finished the operation.
A comment in the bugzilla for this issue[1] seems to suggest that they'd like to rewrite History at the very least. So it's on the priority list somewhere.
"Forget this site" seems to work well for me, but selecting thousands of history items manually and then pressing the delete key will lock firefox up for tens of minutes.
There is definitely something profoundly broken with how history is being handled. Probably more than one thing that's broken, from the sounds of it.
To add on to what you're pointing out -- they even cloned Chrome's "profile-icon-in-the-bar" model, but didn't actually give you the ability to switch profiles with it! Instead more places to shove more links that I forgot about - Firefox Monitor and Firefox Send.