Firefox-ko About Window

Firefox-ko shall conquer your Firefox:

There is a detail Japanese instruction on how you can replace your boring Firefox logo with Firefox-ko.

Via 特別でないただの一日記.

P.S. You are not alone if you are an Opera fan! Recently the Japanese artists are making lots images of Øpera-tan, an elegant but approachable lady wearing opera gloves. She was created as a response to Lawrence Eng's recommendation on Opera branding.