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44.
Definition A. (proper noun): An overrated Web browser made by Mozilla, often used for either:
1) The vast amount of largely-useless add-ons it has;
2) Viewing pornography on the Internet;
3) Its obvious superiority to Internet Explorer (AKA IE);
4) Its obvious superiority to all other browsers; or
5) Its obvious superiority to life, the Universe; and everything else, including the kitchen sink and a unicorn's horn count.

Definition B. (noun): A synonymous term for red panda, which is an indigenous animal to Southeast Asia.

Definition C. (verb): A rapidly-spoken order from either an organization's boss or some other high-ranking officer, most often used to kick another employee out of their job. Usually, that said employee has either:
1) The given name "Fox;"
2) The surname "Fox;" or
3) The nickname "Fox."
Example of Definition A:
Person 1: "Dammit, Internet Explorer just crashed on me again!"
Person 2: "Well, why don't you just use Firefox, then? It'll save you a lot of trouble."
Person 1: "Um, what did you say?"
Person 2: <inefficiently tries to explain what a Web browser is, and what Firefox is, and what its benefits over IE are, and so on, until Person 1 is finally convinced.>
(Later that week...)
Person 1: <goes on long rant about how awesome Firefox is.>
Person 2: "I know, right?!" (Etcetera, etcetera.)

Example of Definition B:
Some random person: "Red pandas are cute. No exceptions."

Example of Definition C:
Some CEO's Wife: "FORTHELOVEOFGOD-FIREFOX!!!!!"
Some CEO: "Okay, fine, whatever- I'll do it!"
by foxhead120 October 02, 2010
 
29.
A decent browser made by Mozilla in 1998.
It rocks Internet Explorer's butt.
1. What browser are you using?
2. Firefox.
1. :D
by Racecar56 April 09, 2009
 
30.
The Best fucking web browser out there

Is superior to internet explorer in every way possible
get Firefox using internet explorer.

Uninstall the inferior software after installing the superior software.
by 45520 February 19, 2007
 
31.
Firefox is to Internet Explorer as flash drives are to floppy disks.
Stop using that sorry excuse for a "Web browser" and download firefox. It's free and it's open source.
by badgerman5566 March 26, 2011
 
32.
Sex.
Guy 1: Firefox.
Guy 2: Sex.
by Ironhatt January 28, 2009
 
33.
A mysterious animal who will one day take over the world. They could be anywhere. Many disguise themselves as humans so that they can blend in and spy on the human population. Forefoxes are everywhere. Beware of their call.
One day firefoxes will take over the world! I love firefoxes!
by firefox21 May 14, 2011
 
34.
1. A novel by Craig Thomas, and the film based off of it featuring Clint Eastwood.

2. An alternative web browser distributed by Mozilla, a "public welfare" organization.

3. Another name for a red panda, proper name Ailurus Fulgens.
1. "What's that one movie with Clint Eastwood in it? Where he steals some important shit from the Soviet Union?"
"Firefox?"
"Yeah, that's the one."

2. "I got Firefox! You should get Firefox too! Everybody should get Firefox!"
"... 'Kay."

3. "We're going to the zoo. They've got a new firefox exhibit, looks cool."
by TheWarOnIndifference July 26, 2009
 
35.
The reason to get rid of Internet Explorer.
Idiotic psycopathic maniac: I love Internet Explorer! Eet keecks azz!!
Master's Degree Rocket Scientist/paleontologist/biologist: Firefox kicks IE's ass.
by Overlord Oozumpti July 23, 2009