Support encrypted and password protected sessions

[silenceofthewans]

First of all thanks for this awesome extension, one thing from the privacy side which is missing in this extension is encryption and password setup. I know it uses bookmarks behind the scenes so I tried using Private Bookmarks but it doesn't play nice with it (can't display sessions from two folders named 'SessionSync') . So, either adding support for it or some other way (maybe asking for passcode for some sessions?) to add privacy to bookmarks would be real nice 👍