If you came here from Seeing unblocked ads? Start here! and you have already ruled out adware, skip to Step 2.


Step 1. Rule out adware


Ad blockers can't prevent ads that are inserted into web pages by adware (malicious software designed to show you ads). The only way to remove the ads is to remove the adware. So the first step in troubleshooting unblocked ads is to scan your computer for malware, even if you have a Mac. Learn about adware.


You can use any free anti-malware application. We recommend Malwarebytes Anti-Malware Free. In our experience, their software tends to find malware that others miss.


If you're not sure what adware looks like, we have some examples. 


Note: Ad blockers are not antivirus or anti-malware applications. If a malware-laden ad gets through, your computer can be infected. Always, always, always use protection on the Internet. If you don't have one, enter "best free antivirus mac," "best free antivirus windows," "best free anti-malware mac," or "best free anti-malware windows" in your favorite search engine.


Step 2. Try some easy fixes


Note: If you are using the AdBlock for Safari Mac app, please try these suggestions first.


Make sure AdBlock is installed and enabled.


Check the AdBlock button in the browser toolbar.

Is it gray, green, or showing a "thumbs-up"? Make sure AdBlock is not paused and the site or page is not whitelisted.


Try turning off the Acceptable Ads setting.

Click the AdBlock button in the browser toolbar and select Options. On the GENERAL tab (the FILTER LISTS tab in the AdBlock for Safari Mac app), clear the check box next to Allow some non-intrusive advertising. Learn more about the Acceptable Ads program.


Make sure you're subscribed to the right filter lists.


Make sure your filter lists are up to date.


Try uninstalling and reinstalling AdBlock.

Be sure to copy any custom filters to a text file for safekeeping first. You'll need to add them again after you reinstall AdBlock. Our payment page opens every time AdBlock is installed, even if you have donated before. If you don't want to pay again at this time, just close the page.


Don't use more than one ad blocker at a time.

If you have additional ad blockers, including Ghostery, disable all of them except for AdBlock. Reload the page where you were seeing ads.


Clear your browser cache and cookies.

You can also reset your browser settings if needed, and make sure your browser is up to date.


Check to see whether you're in incognito or private mode.

Some browsers (such as Chrome) don't allow extensions to work in an incognito or private browsing window until you enable them to do so.


Are the ads on pages that open when you start your browser?


Are the ads on a page you open by clicking a link on a different site?


Step 3. Check for known issues with specific websites


Are you seeing ads on...

Facebook


YouTube


Spotify


Tumblr


Twitch.tv


A Russian or Ukrainian website


An Israeli or Hebrew website


A free streaming video site


Is the website in a language other than English?

Be sure to subscribe to the filter list for that language.



Step 4. Check for issues with your browser


Test the site using a portable version of your browser

This step checks to see whether your browser or browser profile has been corrupted. If your browser or user profile isn't working properly, AdBlock won't, either.


You could uninstall and reinstall your browser, but that's inconvenient. Try it as a last resort. For now, install a portable version of your browser. The portable version will run alongside your existing browser, not replace it.


Install AdBlock in the portable browser and apply the same settings, filter list subscriptions, and custom filters (if any) as in your existing browser. Then visit a page where you were seeing ads.


If the ads are gone, then your existing browser or browser profile is the problem. Go ahead and reinstall your browser. We have instructions in the Browser Issues section of our Knowledge Base.


If the ads aren't gone, then try the troubleshooting steps in the sections below.



Microsoft Edge

Make sure AdBlock is turned on in Microsoft Edge's extension settings.

A bug in Microsoft Edge or Windows 10 may be disabling AdBlock every time Windows is updated.


Make sure the Acceptable Ads setting is still turned off.

If you disabled the "non-intrusive advertising" setting in AdBlock's options, check to see whether it's been turned on again.


Are you seeing ads in videos?


Other Microsoft Edge troubleshooting tips


Make sure AdBlock is turned on in Chrome's extension settings.

Malware or another extension may be disabling AdBlock every time you close Chrome.


Make sure the Acceptable Ads setting is still turned off.

If you disabled the "non-intrusive advertising" setting in AdBlock's options, check to see whether it's been turned on again.


The problem may be Chrome itself.

Chrome is notorious for having "loopholes" that ad technology companies can easily exploit. Here are some workarounds.


Other Chrome troubleshooting tips


Make sure AdBlock is turned on in Safari's extension settings.

A bug or corrupted file in Safari may be disabling AdBlock every time you start Safari.


Make sure the Acceptable Ads setting is still turned off.

If you disabled the "non-intrusive advertising" setting in AdBlock's options, check to see whether it's been turned on again.


Are you seeing ads in videos?


Other Safari troubleshooting tips


Make sure AdBlock is turned on in Firefox's extension settings.

Malware or another extension may be disabling AdBlock every time you close Firefox.


Make sure the Acceptable Ads setting is still turned off.

If you disabled the "non-intrusive advertising" setting in AdBlock's options, check to see whether it's been turned on again.


Are you seeing ads in videos?


Other Firefox troubleshooting tips



Nothing worked! Now what?


If the suggestions above haven't helped, then the ad simply slipped through the filter lists. We do not maintain the filter lists. That means that we can't fix a filter list that isn't blocking an ad. The best thing to do is to report the ad to the list authors so that they can update their filter list and block it for everyone.


If you'd rather not go to the trouble of reporting the ad, you can try to block it manually.


If the ad can't be blocked manually, try the suggestions under "Employ userscripts to thwart anti-adblocking sites" in this article.


What if you have tried everything we suggest and the ad just won't go away? You can try visiting the page in a different browser, where it might be easier to block. But you might just have to do your best to ignore it. Unlike some other ad blockers, we don't take a "scorched earth" approach to ad blocking. If the only way to block an ad is to break the page it's on, we will prioritize site functionality over ad blocking to preserve the user experience.