I'm so certain I posted this a couple of weeks ago but I can't find it so here goes again. I'm running Firefox 3.6.13 that came with Ubuntu (10.10). When I use a word like flavor, the spell-checker underlines it with squiggles and suggests "flavour". Similarly for behavior and some other words. I recognize (that just got sqiggled; it wants "recognise) as being the British spelling convention. I have downloaded the United States English Spellchecker 5.01 but that was of no avail. I finally thought of looking into about:config and found: spellchecker.dictionary set to en_AU - that is, the Australian dictionary. I can't just blindly set this to en-US without knowing that: - That is the correct name for the dictionary I need. (Seems probable.) - That the above extension is indeed the dictionary it would access. I note that the Australian dictionary is spelled en_AU - with an underscore - while the US dictionary is spelled en-US - with a dash. This is the kind of stuff I need to watch out for, because if I mess it up, I may not be able to restart FireFox. Thanks for help here. -- Rasputin