What is firefox.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the firefox.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Firefox.exe file information

Windows Task Manager with firefox
Firefox.exe process in Windows Task Manager

The process known as Tor Browser or Aurora or Waterfox or Nightly or Minefield or Internet Explorer

belongs to software Mozilla Firefox or Adobe SVG Viewer or FoxyTunes for Firefox or Adobe Flash Player Plugin or Adobe Flash Player (version 10 ActiveX, 10 Plugin) or Adobe Flash Player ActiveX or Tor Browser or Mozilla

by Mozilla ( or Microsoft (

Description: Firefox.exe is not essential for the Windows OS and causes relatively few problems. The firefox.exe file is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's "Documents" folder (usually C:\Program Files\Mozilla Firefox\). Known file sizes on Windows 10/8/7/XP are 307,704 bytes (8% of all occurrences), 392,136 bytes and 79 more variants. 
The firefox.exe file is not a Windows core file. The application listens for or sends data on open ports to a LAN or the Internet. It is digitally signed. Firefox.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 19% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall Mozilla Firefox, update it, or get help from the software vendor. Click on to update it, click on for support, or click on Mozilla Firefox in Windows Control Panel (Software or Programs category) to uninstall it.

Recommended: Identify firefox.exe related errors

Important: Some malware camouflages itself as firefox.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan.Generic.2500867 (detected by BitDefender), and Generic.dx!goq (detected by McAfee). Therefore, you should check the firefox.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Firefox is a good browser and is certainly less prone to attach by virus. However, new release are becoming more and more compatible with Microsoft and its threaded internet explorer. Any browser is prone to attach however there are few out there less used such as opera and safari these would be great alternatives to the the big 2
  Trevor Goble  
First off, THOSE VIRUSES ARE NOT FIREFOX, they are a trojan masking as Firefox. Firefox is a web browser by Mozilla, it is one of several F/OSS web browsers. Your virus warning is going to make people believe all versions of Firefox are bad, if you have a trojan masking as a program use only one red dot. I prefer chrome, but i also usually install Mozilla Firefox. TIP: Safari and Iexplorer are horribly slow and bulky browsers, always get a third party like chromium or firefox.
  JD   (further information)
Mozilla Firefox browser
firefox.exe is safe if you have Mozilla Firefox 3.0 or above and are running the browser. However, if it runs without permission, starts without user command, starts at startup without proper configuration, or other things, you probably have a trojan or a worm. For the browser on Win7/Vista I suggest you get an /ftp/ version so that it downloads directly from the server. Also if you have a plugin running plugin-container.exe will be in task manager.
firefox is constantly consuming 100% of my cpu and overheating my powerbook because of flash conten
  DSustin   (further information)
its a fast browser
it will create four files that as shortcut in removeable drive ., and one recyclerfolder ... and also some name file will shit in the starup that cant be details if u delete it & remove for the regedit ..then u ct able to logon to the windows .. the logon window never goes ..i had suffered lot by this virus ex .. u can c some file as oijmufxg.exe and an foleder is created in program file named as gfrakcos
Best Browser on the Interwebz. However acts like a virus when bad flash and javascript is nearby.... COMON MOZILLA, re-create your javascript engine, needs to be as good or better than Google Chrome's .JS Engine.
  Won't Convert to Chrome.  
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of firefox.exe: based on 168 votes with 9 reviews. 105 users think firefox.exe is essential for Windows or an installed application. 18 users think it's probably harmless. 15 users think it's neither essential nor dangerous. 7 users suspect danger. 23 users think firefox.exe is dangerous and recommend removing it. 11 users don't grade firefox.exe ("not sure about it").

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Best practices for resolving firefox issues

A clean and tidy computer is the key requirement for avoiding problems with firefox. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the firefox.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

firefox.exe [all]