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Remove Firefox-patch.js (Removal Guide) - Sep 2020 update

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 Reimage Cleaner Intego 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.

Questions about Firefox-patch.js

Image of Firefox-patch.js adwareFirefox-patch.js is a file that includes fake Mozilla Firefox update. Redirects to this site are usually triggered by adware.

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.

Detailed Guide 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 may remove virus damage with a help of Reimage Reimage Cleaner Intego. SpyHunter 5Combo Cleaner and Malwarebytes are recommended to detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove Firefox-patch.js, follow these steps:

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.

To remove Firefox-patch.js from Windows 10/8  machines, please follow these steps:

  1. Enter Control Panel into Windows search box and hit Enter or click on the search result.
  2. Under Programs, select Uninstall a program.Uninstall from Windows 1
  3. From the list, find entries related to Firefox-patch.js (or any other recently installed suspicious program).
  4. Right-click on the application and select Uninstall.
  5. If User Account Control shows up, click Yes.
  6. Wait till uninstallation process is complete and click OK.Uninstall from Windows 2

If you are Windows 7/XP user, proceed with the following instructions:

  1. Click on Windows Start > Control Panel located on the right pane (if you are Windows XP user, click on Add/Remove Programs).
  2. In Control Panel, select Programs > Uninstall a program.Uninstall from Windows 7/XP
  3. Pick the unwanted application by clicking on it once.
  4. At the top, click Uninstall/Change.
  5. In the confirmation prompt, pick Yes.
  6. Click OK once the removal process is finished.

Delete Firefox-patch.js from Mac OS X system

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

If your macOS is displaying some infection symptoms, proceed with the following guide:

Remove Firefox-patch.js from Applications folder:

  1. From the menu bar, select Go > Applications.
  2. In the Applications folder, look for Firefox-patch.js-related entries.
  3. Click on the app and drag it to Trash (or right-click and pick Move to Trash)Uninstall from Mac 1

To fully remove Firefox-patch.js, you need to access Application Support, LaunchAgents, and LaunchDaemons folders and delete relevant files:

  1. Select Go > Go to Folder.
  2. Enter /Library/Application Support and click Go or press Enter.
  3. In the Application Support folder, look for any dubious entries related to Firefox-patch.js and then delete them.
  4. Now enter /Library/LaunchAgents and /Library/LaunchDaemons folders the same way and terminate all the Firefox-patch.js-related entries.Uninstall from Mac 2

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

Remove dangerous add-ons:

  1. Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
  2. Pick Manage Add-ons.
  3. You will see a Manage Add-ons window. Here, look for Firefox-patch.js and other suspicious plugins. Click on these entries and select Disable.Remove add-ons from Internet Explorer

Change your homepage if it was altered:

  1. Open IE and click on the Gear icon.
  2. Select Internet Options.
  3. In the General tab, delete the Home page address and replace it by your preferred one (for example,
  4. Click Apply and then select OK.Reset IE homepage

Delete temporary files:

  1. Press on the Gear icon and select Internet Options.
  2. Under Browsing history, click Delete…
  3. Select relevant fields and press Delete.Clear temporary files from Internet Explorer

Reset Internet Explorer:

  1. Click on Gear icon > Internet options and select Advanced tab.
  2. Select Reset.
  3. In the new window, check Delete personal settings and select Reset again to complete Firefox-patch.js removal.Reset Internet Explorer

Eliminate Firefox-patch.js from Microsoft Edge

Delete unwanted extensions from MS Edge:

  1. Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
  2. From the list, pick the Firefox-patch.js-related extension and click on the Gear icon.
  3. Click on Uninstall at the bottom.Remove extensions from Edge

Clear cookies and other browser data:

  1. Click on the Menu (three horizontal dots at the top-right of the browser window) and select Privacy & security.
  2. Under Clear browsing data, pick Choose what to clear.
  3. Select everything (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.Clear Edge browsing data

Reset MS Edge if that above steps did not work:

  1. Press on Ctrl + Shift + Esc to open Task Manager.
  2. Click on More details arrow at the bottom of the window.
  3. Select Details tab.
  4. Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.Reset MS Edge

If this solution failed to help you, you need to use an advanced Edge reset method. Note that you need to backup your data before proceeding.

  1. Find the following folder on your computer: C:\\Users\\%username%\\AppData\\Local\\Packages\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  2. Press Ctrl + A on your keyboard to select all folders.
  3. Right-click on them and pick DeleteAdvanced MS Edge reset 1
  4. Now right-click on the Start button and pick Windows PowerShell (Admin).
  5. When the new window opens, copy and paste the following command, and then press Enter:

    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\\AppXManifest.xml” -VerboseAdvanced MS Edge reset 2

Instructions for Chromium-based Edge

Delete extensions from MS Edge (Chromium):

  1. Open Edge and click select Settings > Extensions.
  2. Delete unwanted extensions by clicking Remove.Remove extensions from Chromium Edge

Clear cache and site data:

  1. Click on Menu and go to Settings.
  2. Select Privacy and services.
  3. Under Clear browsing data, pick Choose what to clear.
  4. Under Time range, pick All time.
  5. Select Clear now.Clear browser data from Chroum Edge

Reset Chromium-based MS Edge:

  1. Click on Menu and select Settings.
  2. On the left side, pick Reset settings.
  3. Select Restore settings to their default values.
  4. Confirm with Reset.Reset Chromium Edge

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.

Remove dangerous extensions:

  1. Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
  2. Select Add-ons.
  3. In here, select plugins that are related to Firefox-patch.js and click Remove.Remove extensions from Firefox

Clear cookies and site data:

  1. Click Menu and pick Options.
  2. Go to Privacy & Security section.
  3. Scroll down to locate Cookies and Site Data.
  4. Click on Clear Data…
  5. Select Cookies and Site Data, as well as Cached Web Content and press Clear.Clear cookies and site data from Firefox

In case Firefox-patch.js did not get removed after following the instructions above, reset Mozilla Firefox:

  1. Open Mozilla Firefox browser and click the Menu.
  2. Go to Help and then choose Troubleshooting Information.Reset Firefox 1
  3. Under Give Firefox a tune up section, click on Refresh Firefox…
  4. Once the pop-up shows up, confirm the action by pressing on Refresh Firefox – this should complete Firefox-patch.js removal.Reset Firefox 2

Erase Firefox-patch.js from Google Chrome

Delete malicious extensions from Google Chrome:

  1. Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
  2. In the newly opened window, you will see all the installed extensions. Uninstall all the suspicious plugins that might be related to Firefox-patch.js by clicking Remove.Remove extensions from Chrome

Clear cache and web data from Chrome:

  1. Click on Menu and pick Settings.
  2. Under Privacy and security, select Clear browsing data.
  3. Select Browsing history, Cookies and other site data, as well as Cached images and files.
  4. Click Clear data.Clear cache and web data from Chrome

If the above-methods did not help you, reset Google Chrome to eliminate all the Firefox-patch.js-components:

  1. Click on Menu and select Settings.
  2. In the Settings, scroll down and click Advanced.
  3. Scroll down and locate Reset and clean up section.
  4. Now click Restore settings to their original defaults.
  5. Confirm with Reset settings to complete Firefox-patch.js removal.Reset Chrome 2

Get rid of Firefox-patch.js from Safari

Remove unwanted extensions from Safari:

  1. Click Safari > Preferences…
  2. In the new window, pick Extensions.
  3. Select the unwanted extension related to Firefox-patch.js and select Uninstall.Remove extensions from Safari

Clear cookies and other website data from Safari:

  1. Click Safari > Clear History…
  2. From the drop-down menu under Clear, pick all history.
  3. Confirm with Clear History.Clear cookies and website data from Safari

Reset Safari if the above-mentioned steps did not help you:

  1. Click Safari > Preferences…
  2. Go to Advanced tab.
  3. Tick the Show Develop menu in menu bar.
  4. From the menu bar, click Develop, and then select Empty Caches.Reset Safari

Do not let government spy on you

The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices. Avoid any unwanted government tracking or spying by going totally anonymous on the internet. 

You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using Private Internet Access VPN.

Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Julie Splinters
Julie Splinters - Malware removal specialist

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