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Why can't the addon website detect my firefox's version?

  • 3 replies
  • 8 have this problem
  • 6 views
  • Last reply by John99

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I have upgrade firfox to the latest version 8.0, but when I want to download an add-on it said 'Not available for Firefox 3.6.8', which is the version before I upgrade.

I have upgrade firfox to the latest version 8.0, but when I want to download an add-on it said 'Not available for Firefox 3.6.8', which is the version before I upgrade.

Chosen solution

Your User Agent string, from the system info aside is identifying you as apparently using some sort of Firefox 3.6 That also has a rather suspicious element QQDownload/1.7 so possibly you have downloaded Firefox from some sort of unofficial site, and or have some odd software installed.

  • to check your User Agent String yourself use
    Firefox Button -> Help -> Troubleshooting information
    • we see: Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 QQDownload/1.7

I suggest you

Are you using a Chinese ISP or downloading a Chinese version ?
(I note the UAS includes zh_CN )

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Chosen Solution

Your User Agent string, from the system info aside is identifying you as apparently using some sort of Firefox 3.6 That also has a rather suspicious element QQDownload/1.7 so possibly you have downloaded Firefox from some sort of unofficial site, and or have some odd software installed.

  • to check your User Agent String yourself use
    Firefox Button -> Help -> Troubleshooting information
    • we see: Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 QQDownload/1.7

I suggest you

Are you using a Chinese ISP or downloading a Chinese version ?
(I note the UAS includes zh_CN )

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I have resolved the problem. It's the User Agent Switcher addon that cause that problem. I have ever installed the addon before and changed the configuration, but I uninstalled it without reset the configuration. So the user agent seems odd. When I reinstall the addon and reset it to the default user agent, it becomes ok. Thanks a lot for helping me!

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Glad you sorted it out,
John