(of course if adblocks is not loaded, you will not have that option)
You could also take a look at this which talks about what to do if Firefox stops working correctly. (I have not read it all yet, but hopefully it can help)
(gem) Træt af at skulle klikke dig igennem 2-3 side for at komme til den samme side. Betalende medlemmer kan tilføje det til deres kontekst menu. (pauloaguia) (vis alle tips)