there are a plethora of ways to fingerprint a browser - changing the UA is not only often useless, it is often *less* than useless in that it can make it easier to fingerprint - i don't know if the devs that write this rudimentary stuff and advertise it as a "privacy" add-on are doing it because it's their first add-on as a high school project or what, but you are doing a disservice to people by falsely claiming that changing the UA is generally a good thing for protecting privacy when you must know better, and if you don't, then you surely shouldn't be messing around in this area
REPLY TO DEV: yes, my review was indeed a rant and i apologize if it seemed personal, but it really wasn't intended to be - i was attacking the idea of several developers wrongly insinuating that messing with the UA string is somehow going to lead to better privacy when, in fact, this is largely untrue and while you may consider this information "pretty useless", i disagree
regarding your disclaimer, it isn't posted here where people d/l the add-on - why not?
i also never implied that you were advertising the ext. as full-proof, but perhaps you should make that clear in your description instead of possibly allowing people to perceive otherwise, like @acritum who wrongly thinks, "Well, the main idea of using this plugin is to minimize the spying activities ..."
in the end i feel my review is accurate and i will let it stand - if you feel otherwise, you can gripe to Moz and likely get it removed, or you can be far more open and informative with folks and i'll update or delete it myself