There is a feature request page (somewhere) at mozilla.org if you or I don't find a feature.
Bob
I just upgraded and installed many extensions, but...where is:
My right click options?
Single Window option?
Close "X" on each tab?
Mouse over tab to switch highlight?
Open tab with home page?
I am sure I will find other items missing!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic