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Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

I downloaded 4.0.1 to my PC desktop, so why is it still telling me my current version--4.0--is outdated?

  • 3 fhreagra
  • 1 leis an bhfadhb seo
  • Freagra is déanaí ó TonyE

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The download is completed. Do I need to do something else for it to take effect?

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Your user agent string (identifies the browser version) is reporting that you have Firefox 3.5.19 and not 4.0.1

A quick check to confirm what version you have, if the bookmarks menu has an item called "Organize bookmarks" you will be using Firefox 3.5.19, if it has an item called "Show All Bookmarks" you will have Firefox 4

If you have Firefox 4, you need to reset your user agent string so that it correctly identifies the version of Firefox.

  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

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Thank you, and you're right--I do have 3.5.19. (4.0 didn't take effect either.) I am so ignorant about all this. But after the download has completed, I know there's something more I need to do to get it to take effect, and I don't know what that is!

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After you download the setup file you need to run it to install the new version.

Alternatively use the built-in update system. In the Help menu select "Check for Updates" and it should offer to update to Firefox 4.0.1