Drop obsolete references to HTTPS Everywhere and fix deleting uBlock from the Unsafe Browser
We were inheriting HTTPS Everywhere from Tor Browser, which stopped including this extension.
While doing this work, I noticed that the way we were attempting to delete our other extra add-on from the Unsafe Browser was outdated, so I fixed that, and removed a workaround we had put in place back when it became outdated.
Edited by intrigeri