"The very first Mozilla logo, after the decline of Netscape, was a phoenix reborn from its flames. When they had to change their name, they opted for an animal that was not well known on the web at the time. It was the red panda. Unfortunately, people thought that the animal on the Mozilla Firefox logo was a fox. This "firefox" is actually a red panda which is a protected species in Asia. A mistake when translating red panda from Chinese to English is how we got firefox.".

From: https://www.freelogodesign.org/blog/2019/06/14/the-story-behind-the-mozilla-firefox-logo

A fire fox is another name for a red panda.