Created attachment 720546 [details] test.html User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0 Build ID: 20130215130331 Steps to reproduce: There is <select> with disabled and selected <option>. 1. Click on <select> and move mouse cursor over any enabled <option>, but not select it. 2. Move mouse cursor horizontally outside of <select> 3. Click anywhere on the page. 4. Click on any other window. Actual results: After the 3-rd action nothing happens. After the 4-th action 'onchange' event is raised for <select>. Expected results: Nothing must happen after any action.
I tried looking for a regression, but this happens in nightlies going back to 2008.