Back in December 2001, kiwi UI designer “mpt” (Matthew Thomas) wrote a list of “the top ten usability problems in Mozilla” – i.e. the Mozilla Application Suite. It was endorsed by Dave Hyatt as summing up what’s wrong “pretty nicely”. He kept it updated until June 2002. The release of Firefox 3 seemed like a good moment to revisit his list to see which, if any, of the problems have been addressed in the past six years. mpt now lives in London and does UI work for Ubuntu, but was kind enough to provide up-to-date comments on the original and on my comments.