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I was update my FireFox to 4.0.1,but when i try to intall extension,it report my FireFox is 3.0.8,why?

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cp933@hotmail.com
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I just update my FireFox from 3.5 to 4.0.1,but when i try to intall extensions which need FireFox 4.0.*,it report my FireFox was 3.0.8 and cannot intall.when i choice an extension which suport 3.0.*-4.0.*,it works well.

I just update my FireFox from 3.5 to 4.0.1,but when i try to intall extensions which need FireFox 4.0.*,it report my FireFox was 3.0.8 and cannot intall.when i choice an extension which suport 3.0.*-4.0.*,it works well.

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TonyE
TonyE
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This is typically caused when an add-on changes the user agent string (identifies the version of Firefox). To rectify this you can reset your user agent string.

  1. Type about:config into the location bar and press enter
  2. Accept the warning message that appears, you will be taken to a list of preferences
  3. Locate the preference general.useragent.override, right-click on it and select Reset, this will set the user agent string back to the default in Firefox 4

There are other user agent string settings that may have been modified, but these are no longer used in Firefox 4. You can reset them if you want, for details see https://support.mozilla.com/kb/Websites+or+add-ons+incorrectly+report+incompatible+browser