Den här webbplatsen har begränsad funktionalitet medan vi utför underhåll för att förbättra din upplevelse. Om en artikel inte löser ditt problem och du vill ställa en fråga har vi vår gemenskap som väntar på att hjälpa dig på @FirefoxSupport på Twitter, /r/firefox på Reddit.

Sök i support

Akta dig för supportbedrägerier: Vi kommer aldrig att be dig att ringa eller skicka ett sms till ett telefonnummer eller dela personlig information. Rapportera misstänkt aktivitet med alternativet "Rapportera missbruk".

Läs mer

after installing new 4. Beta and not liking it, uninstalling it; I installed 3.6. when I try to apply a new theme, I get the message that I'm running 3.0

more options

I installed the new Beta and didn't like it because there were no large themes. I uninstalled it and then went to Mozilla via Internet Explorer and downloaded and installed Firefox 3.6. For hours I have tried to install 3.6 themes and I keep getting messages that say I'm running 3.0.

I installed the new Beta and didn't like it because there were no large themes. I uninstalled it and then went to Mozilla via Internet Explorer and downloaded and installed Firefox 3.6. For hours I have tried to install 3.6 themes and I keep getting messages that say I'm running 3.0.

Alla svar (1)

more options

Your UserAgent string in Firefox is messed up by another program that you installed.
http://en.wikipedia.org/wiki/User_Agent

type about:config in the URL bar and hit Enter
If you see the warning, you can confirm that you want to access that page.
Filter = general.useragent.
Right-click the preferences that are bold, one line at a time, and select Reset.
Then restart Firefox