So... this happens to my Firefox browser in like 5 days after I install it. After I reinstall it behaves normal. It doesn't display all sites like this. Same site on Explorer looks as expected. Restarting the browser doesn't seem to help. I do have installed 2 plugins or add-ons (Adblock & VideoHelper) but I'm almost sure this doesn't explain it. and I didn't messed with the settings. So... anyone?