Background: I'm a software developer running Firefox 33 on Ubuntu 14.04. I've tried all the usual things to fix this problem including: - safe mode - creating a new and fresh profile - disabling http proxy in settings - restarted firefox and the computer - can use Chrome without problems, ruling out general networking/internet speed issues Problem: I use Firefox as my default browser constantly. It was working just fine yesterday for most of the day. However, when I came home in the evening and fired up the computer, browsing the internet with Firefox was agonizing. I'm talking like 10-20 seconds to load pages that are loading almost instantly on Chrome on the same computer. I do note that sometimes a page will load almost instantly as it should, but then subsequent assets on that page and further page loads will go back to taking a long time.