I have a new computer with version 21.0 of Firefox. My previous machine, running XP - rather old - allowed me to (optionally) have my bookmarks as a list on the left hand side of the screen. The options were none, bookmarks or history in a pane that was created on the fly. (If none, the pane did not appear.) It was a really useful feature I would like to be able to do the same in my new version. Any help would be appreciated.