The user agent is generic Linux and not Ubuntu 11.04 Natty

[Matt Jones]

Binary package hint: firefox

In firefox 4 the user agent string says just Linux. It should say the OS name, version, and architecture (Ubuntu Natty 11.04 x86_64).

[Michael Nelson (michael.nelson)]

This also affects other projects which try to detect the OS version to display the most relevant application version for a user (ie. apps.ubuntu.com).

[Jeremy Bícha (jbicha)]

Since Firefox 4, Mozilla has changed the way useragent strings work. It is no longer possible to add a vendor-specific extension. Please see the bottom of https://developer.mozilla.org/en/Gecko_user_agent_string_reference It suggests using an HTTP header (using a Firefox extension) to get a similar result.

[Micah Gersten (micahg)]

This will actually be restored in Firefox 8 which will be coming to 11.04 shortly.

[Micah Gersten (micahg)]

Umm, this will be Ubuntu specific, the upstream builds still won't have this.

[Jeremy Bícha (jbicha)]

Micah, this is my useragent on Precise. Will the Ubuntu version number be restored also?

Mozilla/5.0 (Ubuntu; X11; Linux x86_64; rv:9.0) Gecko/20100101 Firefox/9.0

[Chris Coulson (chrisccoulson)]

No version number will be restored

[Micah Gersten (micahg)]

Ah, right, it's just the 'Ubuntu' string. Marking invalid again.