A recent change (I don't know exactly what version this started at) made to the way the history panel works in Firefox makes it so that I can no longer delete sorted groups (month, site, etc) of history entries. I am also no longer able to delete an individual entry by pressing delete.
Also, when I close the history panel, it leaves the sidebar open, even though I didn't have it open before opening the history pane (with ctrl+h).
Also also, I enabled vertical tabs out of curiosity, all of the buttons on the sidebar excluding the "Customize sidebar" button disappeared, as seen in the screenshot. They reappear when I close and reopen Firefox, but this still seems like a bug.
