This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

wrong version number

  • 5 replies
  • 36 have this problem
  • 1 view
  • Last reply by cor-el

facesiki
facesiki
more options

HI!

I'm using firefox 3.6.9 hungarian version, but a lot of site, and firefox add on think's i'm using firefox 2.0.0.5 version. Reinstalling, updating, retart (browser, computer etc) not helping. This "started" (well not started, just realized something is wrong) about more than a year ago, when youtube decide not to support the old browsers. First i belived the sites are wrong, but now too many sites thinks that i have old version browser, even your addons site too.

HI! I'm using firefox 3.6.9 hungarian version, but a lot of site, and firefox add on think's i'm using firefox 2.0.0.5 version. Reinstalling, updating, retart (browser, computer etc) not helping. This "started" (well not started, just realized something is wrong) about more than a year ago, when youtube decide not to support the old browsers. First i belived the sites are wrong, but now too many sites thinks that i have old version browser, even your addons site too.

Chosen solution

Hello ,

the cause of this issue is a bad so called useragent string.

Please reset the UA string the following way:

  1. Enter about:config in Firefox and press the Enter key.
  2. Confirm the upcoming warning by clicking I'll be careful, I promise.
  3. Filter the list for general.useragent.
  4. Repeat the following step for every bold line that you find:
  • Right-click the bold line and select Reset.

Now the websites should recognize your version again.

Read this answer in context 👍 8

All Replies (5)

user66338
user66338
more options

Chosen Solution

Hello ,

the cause of this issue is a bad so called useragent string.

Please reset the UA string the following way:

  1. Enter about:config in Firefox and press the Enter key.
  2. Confirm the upcoming warning by clicking I'll be careful, I promise.
  3. Filter the list for general.useragent.
  4. Repeat the following step for every bold line that you find:
  • Right-click the bold line and select Reset.

Now the websites should recognize your version again.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

FYI: That user agent corruption is in your case caused by the MegaUpload toolbar.

facesiki
facesiki Question owner
more options

@cor-el: the funny part is there aren"t any megaupload toolbar installend on my computer

Modified by facesiki

facesiki
facesiki Question owner
more options

@Tobbi: thank you this was helpful

Modified by facesiki

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can see by the user agent (2.0.0.5;MEGAUPLOAD) that it must have happened in the time that you used Firefox 2.0.0.5 (2007071317) and that is quite a few years ago. If you do not reset preferences added by an extension after removing an extension then you will still have those preferences active in prefs.js and some like this one can have effect years later. If you have such an old profile then maybe it is time to create a new profile to get rid of all leftovers from such old versions.

See also: 

http://kb.mozillazine.org/Resetting_preferences
http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows