“Ads not by this site” - How to remove

“Ads not by this site” is a label shown next to ads that are injected into your browser by malicious browser add-ons. “Ads not by this site” might appear on almost every site that you visit, including sites that don’t normally have ads such as Wikipedia. There are a lot of browser add-ons that could be responsible for “Ads not by this site”, so you might need to disable them one-by-one until you can find out which extensions need to go.

“Ads not by this site” ads are caused by malicious browser add-ons:

Type of threat	Trojan, adware, browser hijacker.
How to stop “Ads not by this site”	Uninstall the offending browser add-on manually, or scan your computer with an anti-malware tool (SpyHUnter for PC, Combo Cleaner for Mac, etc).
Dangers of “Ads not by this site”	Malicious ads that are made to scam people, injected ads break websites and make them hard to read, obnoxious ads are loud, distracting, and waste your bandwidth.
How malicious add-ons get installed	They come with bundlers and get installed without your consent, they’re “required” by sites to give you access to content.

How to get rid of “Ads not by this site”

With “Ads not by this site” ads being injected into your browser, that specific browser is the only one affected by the unwanted ads. If all of your browsers are showing “Ads not by this site”, then your computer is infected, not just your browsers. Either way, seeing ads labeled “Ads not by this site” is a symptom of an adware infection in your browser or your computer.

Ad injection is a pretty common type of ad fraud where the victim’s browser is forced by malware to show the attacker’s ads. Often, these new ads replace the ads that are published on the page the victim is visiting. But the ads can also be injected into or on top of site content. It makes websites look ugly, drives users away, links to malicious or affiliated sites.

If you’re trying to get away from “Ads not by this site”, you need to find the specific browser add-on or application that is responsible.

One way to do this is to scan your computer with an antivirus program, such as Spyhunter for Windows, Combo Cleaner for Mac OS, or another trusted tool. They should find any problematic software for you.

You can also find the adware manually. “Ads not by this site” must be caused by the browser add-on that you installed at the time these ads begun. Examples of extensions that have caused “Ads not by this site” include AdLyrics, LyricsSay, SeeSimilar, Codec-V, Codec-M, Vid-Saver, BCool, I Want This, and others. The add-ons that show “Ads not by this site” should be the ones that have access to all the sites that you visit. To see add-on permissions, you only need to visit the extension settings page in your browser.

What you need to do is pretty simple, if time-consuming:

• disable all the browser extensions until you stop seeing “Ads not by this site”;
• then, enable them one-by-one, until “Ads not by this site” show up again;
• the last extension you enabled is the malicious one – get rid of it.

There could be more than one, so be thorough.

How “Ads not by this site” work

Unwanted ads

The ads labeled “Ads not by this site” range from normal ads for online stores, coupons, and deals, to malicious ones with fake system warnings, fake giveaways, and fraudulent get-rich-quick schemes. Adware viruses like “Ads not by this site” tend to show bad ads just because those types of advertisers have a harder time finding a publisher and are willing to work with unscrupulous ad fraudsters, such as the people behind “Ads not by this site”.

Besides trying to scam you out of your money, get you to download malware, and waste your time with untrustworthy gambling sites, “Ads not by this site” can also make some websites look broken. The add-on that’s injecting “Ads not by this site” is basically taking the webpages, which are kind of like documents or text files, and putting a whole ad somewhere in there. It can make sites display strangely and displace or cover up content, making web browsing really frustrating.

“Ads not by this site” hurts not just you – it also hurts the publishers (the websites that you visit), their reputation, and the advertisers that advertise there. Overall, ad-injecting malware is a big problem, with “Ads not by this site” being just a single example.

Deceptive installation

The “Ads not by this site” add-ons may have come bundled with other software via a pay-per-install scheme. Basically, a program that is distributed for free, when being installed, installs multiple unwanted apps, including browser extensions. The maker or the distributor of the bundler gets paid for each successful installation of those unwanted add-ons. Even trusted programs are sometimes abused and forced to deliver adware.

Extensions like Codec-V and Codec-M were also installed after they were recommended or required by dishonest websites. Such sites appear when you’re trying to pirate some movies or download some free files. Do not listen to them – these recommended extensions always turn out to be malware.

Automatic Malware removal tools

Manually uninstall “Ads not by this site” add-ons

TopRemoving “Ads not by this site” from Chrome

• Click on the menu button on the top right corner of a Google Chrome window. Select “Settings”.
  
• Click “Extensions” on the left menu bar.
• Go through the extensions list and remove programs you do not need, especially similar to “Ads not by this site”. Click on the trash bin icon next to “Ads not by this site” or other add-ons you want to remove.
  
• Press on the “Remove” button on the Confirmation window.
  
• If unsure, you can disable them temporarily.
  
• Restart Chrome.

(Optional) Reset your browser’s settings

If you are still experiencing any issues related to “Ads not by this site”, reset the settings of your browser to its default settings.

• Click on Chrome’s menu button (three horizontal lines) and select Settings.
  
• Scroll to the end of the page and click on the Reset settings button.
  
• Click on the Reset button on the confirmation box.
  

If you cannot reset your browser settings and the problem persists, scan your system with an anti-malware program.

TopRemoving “Ads not by this site” from Firefox

• Click on the menu button on the top right corner of a Mozilla window and select the “Add-ons” icon (or press Ctrl+Shift+A on your keyboard).
  
• Go through Extensions and Addons list, remove everything “Ads not by this site” related and items you do not recognise. If you do not know the extension and it is not made by Mozilla, Google, Microsoft, Oracle or Adobe then you probably do not need it.
  

(Optional) Reset your browser’s settings If you are still experiencing any issues related to “Ads not by this site”, reset the settings of your browser to its default settings.

• Click on the menu button on the top right corner of a Mozilla Firefox window. Click on the Help button.
  
• Choose Troubleshooting Information on the Help menu.
  
• Click on the Reset Firefox button.
  
• Click on the Reset Firefox button on the confirmation box. Mozilla Firefox will close and change the settings to default.
  

If you cannot reset your browser settings and the problem persists, scan your system with an anti-malware program.

TopRemove malicious extensions from Internet Explorer

• Press on the Gear icon→Manage Add-ons.
  
• Go through Toolbars and extensions. Remove everything related to “Ads not by this site” and items you do not know that are made not by Google, Microsoft, Yahoo, Oracle or Adobe.
  
• Close the Options.

(Optional) Reset your browser’s settings

If you are still experiencing any issues related to “Ads not by this site”, reset the settings of your browser to its default settings.

• Press on the Gear icon->Internet Options.
  
• Choose the Advanced tab and click on the Reset button.
  
• Select a “Delete personal settings” checkbox and click on the Reset button.
  
• Click on the Close button on the confirmation box, then close your browser.
  

If you cannot reset your browser settings and the problem persists, scan your system with an anti-malware program.