What I _really_ want is an option that allows me to prune my Facebook posts. Like if I had a button, or at least some sort of bulk deletion with overview, so I could delete all of my political posts and memes then it would be really handy.
This clear history is handy I guess. Seems kinda shitty to need it, though.
Did you uninstall that after using it? Otherwise that extension still has the ability to "read and change your data on all facebook.com sites." For all you know, it may have uploaded a copy of all your Facebook data to its servers already.
I deactivate the extension after usage. I also looked at the console/source code and the only external urls the extension is calling are google services (Analytics and Chrome Store) I have analytics blocked in the HOSTS file anyway.
This clear history is handy I guess. Seems kinda shitty to need it, though.