I have a website form with a large amount of dynamically generated javascript that uses jQuery to handle events. When clicking on radio buttons in the form Firefox 26 will get part way through then stop responding for around two minutes while showing (Not Responding) in the title. If I go into about:config and disable javascript.options.baselinejit.content the form works fine, if I enable that option FireFox becomes unresponsive part way through the form. This started recently but I don't know exactly which version is started on, Firefox 26 definitely has the issue for me. All extensions and plugins have been disabled and "Use hardware acceleration when available" is not selected. Also the form works correctly in Chrome 31, Internet Explorer 7, 8, 9, and 10.