Confirmed this behavior - in an stock install of Jaunty that is (according to System->Administration->Language Support) set up for US/English, Firefox thinks 'behavior' should be spelled 'behaviour', 'artifact' should be spelled 'artefact', and so on.
In FF, Tools->Add-ons->Languages shows that en-gb is installed ** Changed in: firefox-3.0 (Ubuntu) Status: New => Confirmed -- Firefox uses en-GB by default instead of en-US https://bugs.launchpad.net/bugs/333799 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs