Severity scale:  

Firefox-patch.js. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Adware

Firefox-patch.js – a fake Firefox update file that might bring malware to the computer

Example of Firefox-patch.js

Firefox-patch.js is a dangerous file that pretends to be a legitimate browser update. This fake “Urgent Firefox update” might spread various potentially unwanted programs or malware. Hence, installing and running this file on the computer might lead to a serious cyber attack. 

Firefox-patch.js is promoted and urged to download on a compromised website. Usually, redirects to this site begins after adware[1] infiltration. However, browser redirect might occur when browsing through insecure sites, such as gaming, gambling or adult-themed.

You can suspect that your computer is infected with adware if you are redirected to fake Firefox update website often. Additionally, after the Firefox-patch.js hijack, you might have to deal with these issues too:


  • redirect to questionable sites that promote Mozilla Firefox or other software updates;
  • display aggressive ads on visited websites;
  • turn text into hyperlinks;
  • promote various third-party programs that might be dangerous or put user’s privacy at risk;
  • track browsing-related information about users.

Just like many similar ad-supported applications, Firefox-patch.js virus is capable of altering targeted browser’s settings and using a virtual layer to display ads on each website the user visits. The excessive amount of advertisements is needed to generate revenue for the developers because clicks on them bring some money.

However, security experts warn that users should stay away from these ads no matter how appealing they look because you might accidentally click on malware-laden ads.[2]. As you can see adware is not dangerous itself, but it can display infected content and cause indirect harm to your PC.

Additionally, Firefox-patch.js is also known for data tracking capabilities. This potentially unwanted application might collect and share various information about users. Hence, you might have to deal with even more pop-ups and redirects. What is worse, your privacy might be put at risk.

For this reason, immediate Firefox-patch.js removal is recommended. We highly recommend scanning the system with Reimage or another anti-malware to clean all adware-related components from the system entirely.

However, you can also remove Firefox-patch.js by deleting the ad-supported program and its associated files manually. Though security experts from[3] warn that this task might be complicated because adware-related entries might be hiding deep in the system. But if you insist on manual elimination, please follow manual removal guide presented below.

Adware which redirects to fake update website spreads bundled with freeware

The adware which is responsible for displaying fake Firefox update alert spread bundled with freeware or shareware. This software marketing method allows hiding PUP under Standard/Quick settings which are widely used by computer users.

The issue with this installer is that it does not ask direct permission if the user wants to install additional components with the primary program or not. It downloads it no matter what. For this reason, you have to get used to opt for Custom/Advanced installation to prevent accidental infiltration of adware, browser hijackers, and other PUPs.

Instructions to delete Firefox-patch.js

We have said that Firefox-patch.js removal can be performed either manually or automatically. Manual elimination instructions are given below. They will explain how to terminate adware-related entries from the system, as well as web browsers. Nevertheless, adware seems to target Mozilla Firefox users the most; we recommend checking each of the browsers installed on your PC too.

If the manual removal guide seems complicated or you are looking for the quick solution to remove Firefox-patch.js from the PC, you should opt for the second option. To delete adware automatically, you have to obtain anti-malware software, scan the system with it, and reset affected browsers.

You can remove Firefox-patch.js automatically with a help of one of these programs: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus, Malwarebytes Anti Malware. We recommend these applications because they can easily delete potentially unwanted programs and viruses with all their files and registry entries that are related to them.

We might be affiliated with any product we recommend on the site. Full disclosure in our Agreement of Use. By Downloading any provided Anti-spyware software to remove Firefox-patch.js you agree to our privacy policy and agreement of use.
do it now!
Reimage (remover) Happiness
Reimage (remover) Happiness
Compatible with Microsoft Windows Compatible with OS X
What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Firefox-patch.js. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
More information about this program can be found in Reimage review.
Press mentions on Reimage

Manual Firefox-patch.js Removal Guide:

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of Firefox-patch.js from Windows systems

To delete Firefox-patch.js adware from the system, you should follow the guide below and reset each of the affected browsers.

  1. Click Start Control Panel Programs and Features (if you are Windows XP user, click on Add/Remove Programs). Click 'Start -> Control Panel -> Programs and Features' (if you are 'Windows XP' user, click on 'Add/Remove Programs').
  2. If you are Windows 10 / Windows 8 user, then right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel and Uninstall a Program. If you are 'Windows 10 / Windows 8' user, then right-click in the lower left corner of the screen. Once 'Quick Access Menu' shows up, select 'Control Panel' and 'Uninstall a Program'.
  3. Uninstall Firefox-patch.js and related programs
    Here, look for Firefox-patch.js or any other recently installed suspicious programs.
  4. Uninstall them and click OK to save these changes. Right click on each of suspicious entries and select 'Uninstall'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Delete Firefox-patch.js from Mac OS X system

To eliminate PUP from Mac OS X, follow these steps:

  1. If you are using OS X, click Go button at the top left of the screen and select Applications. Cick 'Go' and select 'Applications'
  2. Wait until you see Applications folder and look for Firefox-patch.js or any other suspicious programs on it. Now right click on every of such entries and select Move to Trash. Click on every malicious entry and select 'Move to Trash'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Remove Firefox-patch.js from Internet Explorer (IE)

  1. Remove dangerous add-ons
    Open Internet Explorer, click on the Gear icon (IE menu) on the top right corner of the browser and choose Manage Add-ons. Click on menu icon and select 'Manage add-ons'
  2. You will see a Manage Add-ons window. Here, look for Firefox-patch.js and other suspicious plugins. Disable these entries by clicking Disable: Right click on each of malicious entries and select 'Disable'
  3. Change your homepage if it was altered by virus:
    Click on the gear icon (menu) on the top right corner of the browser and select Internet Options. Stay in General tab.
  4. Here, remove malicious URL and enter preferable domain name. Click Apply to save changes. Delete malicious URL, enter your desired domain name and click 'Apply' to save changes
  5. Reset Internet Explorer
    Click on the gear icon (menu) again and select Internet options. Go to Advanced tab.
  6. Here, select Reset.
  7. When in the new window, check Delete personal settings and select Reset again to complete Firefox-patch.js removal. Go to 'Advanced' tab and click on 'Reset' button. Now select 'Delete personal settings' and click on 'Reset' button again
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Eliminate Firefox-patch.js from Microsoft Edge

Reset Microsoft Edge settings (Method 1):

  1. Launch Microsoft Edge app and click More (three dots at the top right corner of the screen).
  2. Click Settings to open more options.
  3. Once Settings window shows up, click Choose what to clear button under Clear browsing data option. Go to Settings and select 'Choose what to clear'
  4. Here, select all what you want to remove and click Clear. Select 'Clear' button
  5. Now you should right-click on the Start button (Windows logo). Here, select Task Manager. Open the start menu and select 'Task Manager'
  6. When in Processes tab, search for Microsoft Edge.
  7. Right-click on it and choose Go to details option. If can’t see Go to details option, click More details and repeat previous steps. Right-click 'Microsoft Edge' and select 'Go to details' Select 'More details' if 'Go to details' option fails to show up
  8. When Details tab shows up, find every entry with Microsoft Edge name in it. Right click on each of them and select End Task to end these entries. Find Microsoft Edge entries and select 'End Task'

Resetting Microsoft Edge browser (Method 2):

If Method 1 failed to help you, you need to use an advanced Edge reset method.

  1. Note: you need to backup your data before using this method.
  2. Find this folder on your computer: C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  3. Select every entry which is saved on it and right click with your mouse. Then Delete option. Go to Microsoft Edge folder on your computer, right-click every entry and click 'Delete'
  4. Click the Start button (Windows logo) and type in window power in Search my stuff line.
  5. Right-click the Windows PowerShell entry and choose Run as administrator. Find Windows PowerShell, right-click it and select 'Run as administrator'
  6. Once Administrator: Windows PowerShell window shows up, paste this command line after PS C:\WINDOWS\system32> and press Enter:
    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register $($_.InstallLocation)\AppXManifest.xml -Verbose}
    Copy and paste a required command and press 'Enter'

Once these steps are finished, Firefox-patch.js should be removed from your Microsoft Edge browser.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Uninstall Firefox-patch.js from Mozilla Firefox (FF)

Check the list of Mozilla Firefox extensions. Uninstall questionable apps that might be responsible for disturbing browsing sessions with ads or redirects. Also, browser reset is needed.

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select Firefox-patch.js and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  4. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete Firefox-patch.js removal. Click on 'Reset Firefox' button for a couple of times
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase Firefox-patch.js from Google Chrome

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select Firefox-patch.js and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  4. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  5. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  6. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  7. Click Reset to confirm this action and complete Firefox-patch.js removal. Click on 'Reset' button to complete your removal
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of Firefox-patch.js from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for Firefox-patch.js or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  4. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete Firefox-patch.js removal process. Select all options and click on 'Reset' button
After uninstalling this potentially unwanted program (PUP) and fixing each of your web browsers, we recommend you to scan your PC system with a reputable anti-spyware. This will help you to get rid of Firefox-patch.js registry traces and will also identify related parasites or possible malware infections on your computer. For that you can use our top-rated malware remover: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware.

About the author

Julie Splinters - Malware removal specialist

If this free removal guide helped you and you are satisfied with our service, please consider making a donation to keep this service alive. Even a smallest amount will be appreciated.

Contact Julie Splinters
About the company Esolutions


Removal guides in other languages