How To Change The User Agent String In Firefox

Note: Works with Firefox, Flock, SeaMonkey, and Songbird.

Before

Before adding the extension to our browser we tested the user agent string at UserAgentString.com and got a positive I.D. result for Firefox.

After

Once you add the extension to Firefox you can access the alternate user agent string in two ways. The first is through the tools menu…

Note: The user agent string will automatically reset back to the default each time you restart Firefox.

And the second is using a toolbar button. Choose the method that works best for you.

For the first test we chose Internet Explorer 8.

Refreshing the page tested positive for IE 8.

Next we chose the Yahoo! Slurp search robot…once again a perfect result.

Moving on we chose iPhone 3.0. As before another positive identification.

To keep things interesting we set the user agent string for Internet Explorer 6. Testing positive for IE 6 and Windows XP here…

And also testing positive at the extension author’s website.

Options

You can create, edit, and delete current user agent strings or use the import/export functions.

Conclusion

The User Agent Switcher extension provides a quick and easy way to change the user agent string for those less than cooperative websites. For those wanting to add additional user agent strings visit this website (available in xml file format).

Links

Download the User Agent Switcher extension (Mozilla Add-ons)

Verify the User Agent String for your browser