File extensions exe : The EXE executable (program) file
An executable file is a program that can be executed on the various Microsoft operating systems (Dos,windows 98/xp/vista).
You may be see in my task manager processes that you have more than one firefox.exe.
It sometimes trying to connect to fxfeeds.mozilla.org:
Firefox (firefox.exe) is trying to connect to fxfeeds.mozilla.org
[IP] using remote port 89 (HTTP - World Wide Web).

What is firefox.exe?

Mozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation.

The following malware is known to disguise itself as firefox.exe:

Troj/Rbot-ATP (%SystemRoot%System32)
This is a Trojan horse that is known to spread by exploiting network vulnerabilities, including the RPC DCOM flaw in Windows XP.
W32/Banker-EBO (%SystemRoot%System32)
This is a Trojan horse that periodically attempts to download executable code from a remote URL.
W32/Tilebot-DN (%SystemRoot%)
This is a Trojan horse that is known to spread by exploiting network vulnerabilities, including the RPC DCOM flaw in Windows XP. It runs an IRC server to allow a remote attacker to take control over an infected system.

Product name: Firefox

Description:Firefox

Manufacturer:Mozilla Corporation


Common error:
A unhandled win32 exception occured in firefox.exe[3052], Just-In-Time debugging this exception failed with the following error: No installed debugger has Just-In-Time debugging enabled. In Visual Studio debugging can be enabled from Tools/Options/Debugging/Just-In-Time.
Check the documentation index for ‘Just-in-time debugging, errors’ for more information