Created attachment 737430 [details] Bildschirmfoto 2013-04-15 um 13.00.17.png User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31 Steps to reproduce: I surfed to http://www.amazon.com, clicked to 'all' at the search bar, and tried to select an option. Nothing happens. This issue can be found on any select-field along the www. Also the Dropdown of form-field suggestions aren't clickable. Actual results: Nothing happens Expected results: The Dropdown should be clickable.
Works for me in: Mozilla/5.0 (X11; Linux x86_64; rv:20.0) Gecko/20100101 Firefox/20.0 Mozilla/5.0 (X11; Linux x86_64; rv:23.0) Gecko/20130414 Firefox/23.0 Can you reproduce this in safe mode? https://support.mozilla.org/en-US/kb/Safe+Mode
It works like it should work in safe mode and doesn't work in normal mode. and - a little bit too late my UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:20.0) Gecko/20100101 Firefox/20.0
If it works in safe mode then one of your extensions must be breaking things. Disable them till you find out which one and report this to the extension author.