The fastest way to stop pop-ups
Most modern browsers have a built-in pop-up blocker that works automatically. In Chrome, Firefox, Safari, and Edge, this feature is turned on by default — you do not have to do anything to set up it. When a pop-up is blocked, you will see a small notification at the top or bottom of the page, usually saying "Pop-up blocked" with a number.
The catch is that built-in blockers stop only the most obvious pop-ups. They miss pop-ups that appear when you click a link, ads that expand within the page itself, and ads disguised as content. For stronger protection, you need a browser extension designed specifically for ad blocking.
Key Takeaways
- Your browser's built-in pop-up blocker is already on and stops most obvious pop-ups, but it does not catch ads that hide inside the page or appear when you click.
- Ad-blocking extensions like uBlock Origin, Adblock Plus, and Ghostery remove more ads than the browser alone, but they use more memory and may break some websites.
- Turning off an extension on specific websites lets you support sites you trust while keeping protection everywhere else.
- Pop-up blockers and ad blockers are not the same thing — pop-up blockers stop new windows, while ad blockers remove ads from within the page.
Installing an ad-blocking extension
If your browser's built-in blocker is not enough, the next step is to add an extension. The most common choices are uBlock Origin, Adblock Plus, and Ghostery. All three are free and work on Chrome, Firefox, Safari, and Edge.
To install one, go to your browser's extension store. In Chrome, that is the Chrome Web Store. In Firefox, it is Add-ons. Search for the extension by name, click "Add to [Browser]", and confirm. The extension will appear as an icon in your toolbar. Most extensions start blocking ads when ready without any setup.
The trade-off is that extensions use more of your computer's memory than the browser's built-in blocker. If your computer is already slow, adding an extension may make it slower. You can test this by opening your browser's task manager (Shift + Esc in Chrome, about:performance in Firefox) and watching memory use before and after you install.
Why some websites break when you use an ad blocker
Some websites detect that you are using an ad blocker and refuse to load content until you turn it off. This happens because those sites rely on ad revenue to stay running. You will see a message like "Please disable your ad blocker to continue" or a blank page.
You have two choices: turn off the blocker for that site, or leave the site. To turn off the blocker for one site only, click the extension icon in your toolbar, then look for a button that says "disable on this site" or shows a toggle. The next time you visit that site, the blocker will stay off. It will still work everywhere else.
If you want to support a website you use often, disabling the blocker there is a reasonable choice. If you do not trust the site or do not want to see ads there, you can straightforward leave.
The difference between pop-up blockers and ad blockers
These terms are often used the same way, but they do different things. A pop-up blocker stops new windows or tabs from opening without your permission. An ad blocker removes ads from within the page you are already viewing.
Your browser's built-in pop-up blocker handles the first job. Ad blockers handle the second. If you want to stop both pop-ups and ads, you need the browser's blocker plus an extension. Some extensions do both, but most focus on ads.
Adjusting your browser's pop-up settings
If you want to fine-tune when pop-ups are allowed, you can change your browser's settings. In Chrome, go to Settings, then Privacy and Security, then Site Settings, then Pop-ups and redirects. You will see a toggle for "Blocked (recommended)" — this is the default. You can also add specific websites to an allow list if you want pop-ups from certain sites.
In Firefox, go to Settings, then Privacy and Security, scroll to Permissions, and find Pop-ups. The default is "Block pop-ups". You can add exceptions for sites you trust. Safari and Edge have similar settings in their preferences.
Most people should leave the default setting on. Changing it only makes sense if you use a website that needs pop-ups to work — for example, some banking sites use pop-ups for security codes or confirmations.
What to do if pop-ups keep getting through
Sometimes pop-ups appear even with a blocker on. This usually means the ad is not technically a pop-up — it is an ad that expands within the page, or it appears when you click a link. These are called interstitials or in-page ads, and pop-up blockers do not catch them.
An ad-blocking extension will remove most of these. If you install one and still see ads, the extension may not be working on that particular site, or the site may be blocking the extension. Try disabling other extensions to see if one of them is interfering, or try a different ad blocker.
If ads keep appearing on a site you visit often, it may be worth checking whether the site has a paid version without ads. Some news sites, streaming services, and forums offer this option.
Staying safe while blocking ads
Ad blockers themselves are safe — they do not install malware or steal your data. However, some ad-blocking extensions are made by companies that collect information about your browsing. Before you install an extension, check who made it and read the privacy policy. uBlock Origin and Ghostery are both made by privacy-focused companies. Adblock Plus is made by a company that also sells ads, so it may not block all ads.
Never install an ad blocker from a source other than your browser's official store. Fake ad blockers distributed through other websites can contain malware. Stick to Chrome Web Store, Firefox Add-ons, Safari Extensions, or Microsoft Edge Add-ons.
Frequently Asked Questions
Can websites tell if I am using an ad blocker?
Yes, many websites can detect ad blockers. Some will ask you to turn it off. Others will show you a message saying ads are blocked. A few will refuse to load content until you disable the blocker. There is no way to hide that you are using one.
Will an ad blocker slow down my internet speed?
An ad blocker will not make your internet connection faster or slower. It may make pages load slightly faster because it removes ads and tracking code, but the difference is usually small. It may use more of your computer's memory, which can make your browser feel slower if your computer is already running low on resources.
Do I need both a pop-up blocker and an ad blocker?
Your browser already has a pop-up blocker built in. An ad blocker is optional and removes ads from within pages. Most people use both — the browser's blocker for pop-ups, and an extension for ads. You do not need multiple ad-blocking extensions; one is enough.
What if I want to block ads but allow pop-ups from one website?
You can turn off your ad blocker for a specific site while keeping your pop-up blocker on everywhere. Click the extension icon, find the option to disable it on that site, and confirm. Your pop-up blocker will still work. To allow pop-ups from that site too, go to your browser settings and add it to the pop-up allow list.
Is it legal to use an ad blocker?
Yes, using an ad blocker is legal. Websites can ask you to turn it off, and they can refuse to show you content if you do not. But they cannot punish you for using one. Some websites rely on ads for income, so using a blocker means they earn less money from your visits.