When using the new version of firefox(26), some websites can not load like in the last version I was using (23). This specific problem happens only in my Ubuntu box.
I have a Windows box with the same firefox version, and everything is just fine. The problem for me is in the design, css and ajax functions does not load properly, some flash websites are the same, some interfaces functionaly just does not work as expected. Trying those sites with the same firefox version in another Linux distro or Windows works perfectly.
What could it be?