When upgrading Firefox it gets rebranded into something called Shiretoko: now it has a different icon, a different name, a different UserAgent-string.

First of all I'm wondering why? When checking the Mozilla-site I can't find any indication that the name Firefox has disappeared. 3.5.4 is still called Firefox. Why not stick to how the source names its application?

The UserAgent has the value of Shiretoko. This breaks a lot of webscripts because they don't know that Shiretoko==Firefox. To get things working properly again one needs to change the value in the about:config window.

Furthermore it's confusing when giving users support. Imagine a support agent saying 'Now please open the Firefox webbrowser' and having the user responsing that he/she doesn't have Firefox in Applications > Internet. I think it will take a few minutes for the support agent to realize that Shiretoko==Firefox.

Somehow also the searchbox got changed. Now there's only the option to search the ask.com site instead of Google, Wikipedia, etc.