How can I view and change what browser and OS identity information that are sent by Firefox?
NOTE I've tagged both 10.10 and 11.04 because I want to know how to do so from both of the Ubuntu releases.
How can I view and change what browser and OS identity information that are sent by Firefox?
NOTE I've tagged both 10.10 and 11.04 because I want to know how to do so from both of the Ubuntu releases.
In Firefox, open the about:config page and search for useragent. You'll be presented with options to change the different parts that make up a user-agent string:

You can also use an extension like User Agent Switcher, which makes it easy to save a couple and switch between them.
Both of these methods work in Firefox 3.6 (10.10) and 4.0 (11.04).
useragent description appears for me. Even on Windows. But according to a third-party useragent reader, the info includes OS and other info. And is there anyway to keep the entire useragent streak blank/empty?
Another way to view this data is to visit a website like whatsmyuseragent.com from within Firefox (or any other browser).
We just need to somehow manipulate the user agent string of the browser in order to hide our identity. Various plugins are available in the market to do so.