Aka Firefox-ko. A personification of the browser Mozilla Firefox. Little is known about this character, but she's portrayed as a red foxgirl, in a shinto priestess outfit. Its color set and design resemble that of the Firefox logo. Variants include 九尾狐, an imaginary fox-like creature that has 9 tails.
- Linux萌え萌え大作戦 Moe Moe Project (りも)
- Inugamix's version
- yoko's versions: 1, 2
- wizneko's work (webpage)
- rerofumi's version
- TOYBOXARTS version
Aka Thunderbird-ko. A personification of the mail and news client Mozilla Thunderbird. She is the best friend of Firefox-tan. She dresses like a telephone operator, carries a keyboard/monitor, and sometimes holds a letter in her hands.
- SpreadFirefox - Japanese MANGA works
- SpreadFirefox - Backgrounds, a little different.
- SpreadFirefox - More Firefox, T-bird stuff (same author)
- SpreadFirefox - Spread Firefox with Firefox / Thunderbird-tan / ko - Contains information on the -tan fanart
- temp_h's work (Firefox and Thunderbird)