What is Viewer Extension?
Viewer Extension is the name of a software, which has been widely regarded to be potentially unwanted. The main problem with this one is that it may change the settings of the web browsers that you use in order to show multiple kinds of advertisements and track what it is that you type in your browser. These ads are the main way these applications are monetized and they may be risky for your computer system, because some of them may take you to dangerous websites, like malicious URLs or scams.
Read this article if you want to get more details on how this software got inside your computer system in the first place and what it is that you can do to fully get rid of it from your machine.
Viewer Extension Summary
| Name | Viewer Extension |
| Type | Browser Hijacker / PUP / Scam Redirect |
| Short Description | Aims to modify the settings on your web browser in order to get it to cause browser redirects and display different advertisements. |
| Symptoms | Your web browser begins to display various types of online advertisements, which results in slowing down of your computer. |
| Distribution Method | Bundled downloads. Web pages which may advertise it. |
| Detection Tool |
See If Your Device Has Been Affected by Viewer Extension
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Malware Removal Tool
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User Experience | Join Our Forum to Discuss Viewer Extension. |
Viewer Extension Redirect – How Did I Get It
Viewer Extension it’s a program, which is widely regarded to be potentially unsafe. We have seen other PUPs, like Viewer Extension which were recently detected, and they include:
Viewer Extension could be spread via multiple types of methods on your machine, including the following:
- If you have added it from some suspicious site advertising it via pop-up or redirect to include it.
- If it has been automatically installed by some other adware you already have on your computer.
Probably one of the most used tactics for this software to get installed on your computer is to be added in one of the install steps of another program downloaded online. This technique is known as bundling and looks somewhat like the following:
Viewer Extension Hijacker – What Does It Do?
Viewer Extension aims to cause changes to the settings of your web browsers, like replace the default search, add plugins and extensions and show the following kinds of advertisements as a result:
- Redirect adverts.
- Banner ads.
- Push notification pop-ups.
- Pop-up ads.
- Text ads, highlighted on the sites you visit.
- Ad-supported results when you search something.
Many of the websites, which are you featured in the advertisements shown by the software may contain cookies, geo locators, pixels, tags and many other forms of trackers:
These are essentially small objects, which are configured in a way to get the different kinds of details from your web browser and may remain in your computer system for years of time. The details that can be extracted as a result of that could be of the following types:
- What you have visited.
- Your mouse movements.
- IP and Mac addresses.
- Your bookmarked websites.
- Which pages you have visited.
- The browsing history from your browser.
- The browsing history of your web browser.
- Your mouse clicks.
- Sites that you have bookmarked on your computer.
- What searches you have made.
- Where you click online and your mouse movement.
- Different personally identifiable information you may type.
Is Viewer Extension a Virus?
Viewer Extension is not a virus. It is detected as a PUP, from the browser hijacker type. However, it does not mean that the software is safe. Apps, like this one may be dangerous in multiple ways, mainly in the fact that some of their ads may take you to websites related to threats, like:
- Scammer websites.
- Fake survey scams.
- Phishing domains.
- Domains that may have viruses.
- Redirect loop schemes of long URLs.
- Fake software download URLs.
- Fraudulent tech support scams.
This is the primary reason my software like Viewer Extension is regarded as a potentially unsafe application and should be uninstalled immediately.
How to Remove Viewer Extension Adware?
Viewer Extension could effectively be gotten rid of your device if you follow the steps below. They are designed to help you clean it up from your web browser and uninstall it from your computer system altogether. If you want the best possible solution to remove this software, our main suggestion is to scan your computer, using a professional anti-malware program. This is the kind of security application, that many experts recommend, because it has the capability of automatically getting rid of any threats from your computer and protecting it in the future as well.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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- Windows
- Mac OS X
- Google Chrome
- Mozilla Firefox
- Microsoft Edge
- Safari
- Internet Explorer
- Stop Push Pop-ups
How to Remove Viewer Extension from Windows.
Step 1: Scan for Viewer Extension with SpyHunter Anti-Malware Tool
Step 2: Boot Your PC In Safe Mode
Step 3: Uninstall Viewer Extension and related software from Windows
Uninstall Steps for Windows 11
Uninstall Steps for Windows 10 and Older Versions
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully uninstall most programs.
Step 4: Clean Any registries, Created by Viewer Extension on Your PC.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by Viewer Extension there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Video Removal Guide for Viewer Extension (Windows).
Get rid of Viewer Extension from Mac OS X.
Step 1: Uninstall Viewer Extension and remove related files and objects
Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Viewer Extension. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove Viewer Extension via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
→ ~/Library/LaunchAgents
/Library/LaunchDaemons
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove Viewer Extension files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as Viewer Extension, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Video Removal Guide for Viewer Extension (Mac)
Remove Viewer Extension from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase Viewer Extension from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window:
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall Viewer Extension from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove Viewer Extension from Safari
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Viewer Extension will be removed.
Eliminate Viewer Extension from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.
Remove Push Notifications from Your Browsers
Turn Off Push Notifications from Google Chrome
To disable any Push Notices from Google Chrome browser, please follow the steps below:
Step 1: Go to Settings in Chrome.
Step 2: In Settings, select “Advanced Settings”:
Step 3: Click “Content Settings”:
Step 4: Open “Notifications”:
Step 5: Click the three dots and choose Block, Edit or Remove options:
Remove Push Notifications on Firefox
Step 1: Go to Firefox Options.
Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":
Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”
Stop Push Notifications on Opera
Step 1: In Opera, press ALT+P to go to Settings.
Step 2: In Setting search, type “Content” to go to Content Settings.
Step 3: Open Notifications:
Step 4: Do the same as you did with Google Chrome (explained below):
Eliminate Push Notifications on Safari
Step 1: Open Safari Preferences.
Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".
Viewer Extension-FAQ
What Is Viewer Extension?
The Viewer Extension threat is adware or browser redirect virus.
It may slow your computer down significantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.
The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.
What Are the Symptoms of Viewer Extension?
There are several symptoms to look for when this particular threat and also unwanted apps in general are active:
Symptom #1: Your computer may become slow and have poor performance in general.
Symptom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.
Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.
Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.
Symptom #5: You see suspicious processes running in your Task Manager.
If you see one or more of those symptoms, then security experts recommend that you check your computer for viruses.
What Types of Unwanted Programs Are There?
According to most malware researchers and cyber-security experts, the threats that can currently affect your device can be rogue antivirus software, adware, browser hijackers, clickers, fake optimizers and any forms of PUPs.
What to Do If I Have a "virus" like Viewer Extension?
With few simple actions. First and foremost, it is imperative that you follow these steps:
Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.
Step 2: Change all of your passwords, starting from your email passwords.
Step 3: Enable two-factor authentication for protection of your important accounts.
Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activities with your card.
Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.
Step 6: Change your Wi-Fi password.
Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.
Step 8: Install anti-malware software with real-time protection on every device you have.
Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.
If you follow these recommendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.
How Does Viewer Extension Work?
Once installed, Viewer Extension can collect data using trackers. This data is about your web browsing habits, such as the websites you visit and the search terms you use. It is then used to target you with ads or to sell your information to third parties.
Viewer Extension can also download other malicious software onto your computer, such as viruses and spyware, which can be used to steal your personal information and show risky ads, that may redirect to virus sites or scams.
Is Viewer Extension Malware?
The truth is that PUPs (adware, browser hijackers) are not viruses, but may be just as dangerous since they may show you and redirect you to malware websites and scam pages.
Many security experts classify potentially unwanted programs as malware. This is because of the unwanted effects that PUPs can cause, such as displaying intrusive ads and collecting user data without the user’s knowledge or consent.
About the Viewer Extension Research
The content we publish on SensorsTechForum.com, this Viewer Extension how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.
How did we conduct the research on Viewer Extension?
Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the Viewer Extension threat is backed with VirusTotal.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.