Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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.

What registry key/value does Firefox 4+ write it's version info to on XP machines?

  • 2 replies
  • 3 have this problem
  • 90 views
  • Last reply by don123
  • Solved

don123
don123

Can't find it under: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall. Normally XP machines have application info here.

Can't find it under: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall. Normally XP machines have application info here.

Chosen solution

HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\4+\Uninstall

Read this answer in context 👍 1

All Replies (2)

ideato
ideato

Chosen Solution

HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\4+\Uninstall

don123
don123 Question owner

Thanks ideato! The firefox 5 install on our test machine didn't write that registry key for some reason (and the browser was installed and functioning). After reverting the vm to a clean slate and reinstalling firefox 5, that key shows up now.

Also, for use in a script, I think HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\CurrentVersion may be the best place to look for the version because CurrentVersion contains the version number and a script needs a constant path.

Thanks Again!