On Firefox 3.6.10 on MacOS X 10.5.8, I cannot navigate some or all fields in some forms with my keyboard. - In the worst case, the TAB key doesn't work at all: TAB simply toggles between address bar and tab bar, instead of moving from field to field. - On this form (Firefox Support Forum, Ask a New Question), TAB works on some fields, but not on other fields: TAB just skips over the drop-down select list for the "This happened" field and the submit button ("Post Question") . I cannot find any way to navigate to these fields with the keyboard.

I feel that filling in a form is most efficient when I don't have to keep moving my right hand from keyboard to mouse and back again.