Hi Livsi,

Unfortunately this is an English only forum :( If you can re-post your question in English that would be great. You can also use the local Mozilla Russian forums where you can find help in Russian: http://forum.mozilla-russia.org/

Is Firefox crashing or do you only have a problem with viewing some websites?

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

• Инструменты -> Настройки > Дополнительные -> Сеть -> Автономное хранилище: Очистить сейчас (Network -> ClearCache)

"Remove Cookies" from sites causing problems:

• Инструменты -> Настройки > Приватность -> История -> Показать куки (Privacy -> ShowCookies)

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes