Since upgrading to Firefox 27.0 some webpages will not load when I click on them. It gives me a message saying that Firefox can't find the server. I have to click the link several time before it will load and sometimes when they do load it does not show the page right. It is like the HTML is messed up or something. I have tried everything I can think of. I started in safe mode, still did it., I removed add-ons, still did it., I reset Firefox and still did it., I completely uninstalled Firefox and re-installed Firefox and it still does it. I have tried Malware Bytes Anti-Malware scans and Avast boot-time scans and found no malware or viruses. I have found that those websites open the first time with no problems on my IE9 and they used to do so in Firefox 26.0. I'm at my wit's end. The website links are in my bookmarks and are used all the time so they are trusted and my avast is set to allow them. They range from news websites to gun websites and everything I have read says that Mozilla does not filter those unless something has changed recently.