Firefox Beta issue

view full story

http://www.linuxquestions.org – For some reason, in Firefox Beta, the "Thread Tools" button scrolls to the bottom of the page where there are a few buttons, instead of popping up a menu. Similarly, clicking on the username in a post goes to the user's profile instead of popping up the usual menu. I wonder if this is because Firefox Beta doesn't support this, or is it some setting that I can change? I notices that in some sites even things like showing enlarged images and other JavaScript stuff doesn't work, I wonder if that setting (if it exists) would fix those, too? Also, Midori (another browser) behaves simil (HowTos)