A black box rarely covers nearly whole website
This black box may be related to the Flash. When I turn on Adblock Plus the problem is solved, but I don't know how.
URL of affected sites
http://forum.idg.pl/topic/199332-wyskakuje-ochrona-przed-wirusami/
User Agent
Mozilla/5.0 (X11; U; Linux x86_64; pl-PL; rv:1.9.2.6pre) Gecko/20100625 Ubuntu/10.04 (lucid) Namoroka/3.6.6pre GTB7.0
การตอบกลับทั้งหมด (8)
No problem here with Namoroka 3.6.6pre on Windows2000 on that webpage.
Please provide a screenshot of that issue. https://support.mozilla.com/en-US/kb/Adding+screenshots
Do you see the Flash Player loaded if you right-click that black area? Does it help if you disable the Flash plugin (Tools > Add-ons > Plugins) ?
Disabling flash player doesn't help. I can't see the Flash Player loaded.
"Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now" "Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
It's not cookies, cache or theme. I know it's caused by one of add-ons or plugins.
You can try to disable the Flash plugin to see if it is indeed a problem with the Flash plugin. See Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
See also Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
Disbling plugins doesn't help. It must be one of add-ons.
Disabling some add-ons helped. i use default theme now.