I have loaded both sites but I see no problem with that. Great point, @choster. He's right how websites were downloaded. Usually, styles are loaded first before the content. With regards to the problem, there might be some errors on the browser. I always clear the browser history after hours of heavy browsing and I always keep the settings in standard. I'm also not fond of injecting browser extensions. I have the same experience before, until I keep my settings on default which solved the problem.