Pop-ups are usually blocked by default, but you may need to adjust your settings or add an extension
Most modern browsers — Chrome, Firefox, Safari, and Edge — have built-in pop-up blockers that are turned on automatically. If you are seeing pop-ups anyway, your blocker may be disabled, or a particular site may have permission to show them. The fastest fix is to check your browser settings and turn the blocker back on. If that does not work, a browser extension can catch pop-ups that slip through, though it will not stop every single one.
Pop-ups fall into two categories: ones that open in new windows or tabs (which blockers catch most of the time) and ones that appear as overlays on the page itself (which are harder to block). The overlay kind — like newsletter signup boxes or "confirm you are human" prompts — usually require you to close them manually or use an extension designed to hide them.
Key Takeaways
- Your browser's built-in pop-up blocker is usually on already; check your settings if you are still seeing pop-ups.
- Some websites ask permission to show pop-ups, and you can deny that permission in your browser settings.
- Browser extensions like uBlock Origin or Adblock Plus can block pop-ups that slip past your built-in blocker.
- Pop-up overlays (boxes that appear on the page itself) are harder to block and often require manual closing or a specialized extension.
- Blocking too many things can break some websites, so test sites you use regularly after making changes.
Check your browser's built-in pop-up blocker first
Before installing anything new, verify that your pop-up blocker is actually on. In Chrome, open Settings, go to Privacy and Security, then Site Settings, and look for Pop-ups and redirects. Make sure it is set to Blocked. In Firefox, go to Settings, Privacy & Security, and scroll to Permissions — Pop-ups should be checked as blocked. Safari users go to Preferences, Security, and check "Block pop-up windows". Edge follows the same path as Chrome: Settings, Privacy, Site Permissions, Pop-ups and redirects.
If your blocker is already on but you are still seeing pop-ups, a website may have asked for and received permission to show them. You can revoke that permission. In Chrome, click the lock icon next to the web address, then Site Settings, and look for Pop-ups and redirects — change it from Allow to Block. Firefox and Edge have similar controls in the same location. Once you block it, reload the page.
Allow pop-ups for specific sites you trust
Some legitimate websites need to open pop-ups to work properly — online banking, video conferencing, or document uploads sometimes require them. If you trust a site and want to let it show pop-ups, you can add it to your allow list instead of blocking it everywhere.
In Chrome, go to Settings, Privacy and Security, Site Settings, Pop-ups and redirects, and scroll to Allow. Click Add and type the website address (for example, yourbank.com). Do the same in Firefox under Permissions, Pop-ups, Exceptions. This way the site can open pop-ups when you visit it, but other sites cannot.
Use a browser extension for stronger blocking
If your built-in blocker is on and you are still seeing pop-ups, an extension can catch more of them. uBlock Origin is free, open-source, and blocks most pop-ups and ads. Adblock Plus is another popular choice. Both work in Chrome, Firefox, and Edge — search for them in your browser's extension store and click Add to install.
After you install an extension, it usually works right away with no setup needed. Some extensions let you customize what they block by clicking the extension icon in your toolbar and adjusting settings, but the default settings block most pop-ups. Keep in mind that very aggressive blocking can break some websites — if a site stops working after you install an extension, try disabling it for that site and reloading the page.
Deal with pop-up overlays that appear on the page itself
Some pop-ups are not separate windows but overlays — boxes that appear on top of the page content, like newsletter signups or "confirm your age" prompts. Your browser's pop-up blocker cannot stop these because they are part of the website itself, not separate windows. You usually have to close them manually by clicking an X button or a Close button.
If a site has many intrusive overlays, an extension like Popup Blocker Pro or I don't care about cookies can auto-close some of them. Popup Blocker Pro specifically targets overlay pop-ups, while I don't care about cookies focuses on cookie consent boxes (which are a type of overlay). Both are free and available in most browser extension stores. Test them on a few sites first to make sure they do not break anything you use regularly.
Understand what you are blocking and what you are not
Pop-up blockers work best on new windows and tabs that open without you clicking anything. They are less effective at stopping ads that load within the page itself, or overlays that are part of the website's design. Some websites deliberately design their ads to look like pop-ups but are actually part of the page, which means blockers cannot touch them.
Blocking extensions can also slow down your browser slightly because they scan every element on every page you visit. If you notice your browser feels slower after installing an extension, you can disable it for sites where you do not need it, or uninstall it and rely on your built-in blocker instead. The trade-off is between blocking power and speed — most people find the built-in blocker is enough.
Test your settings on sites you use regularly
After you turn on blocking or install an extension, visit a few websites you use often and make sure they still work. Some sites use pop-ups for legitimate functions — login windows, file uploads, or payment processing. If something breaks, you can either add that site to your allow list or disable the extension for it temporarily.
To test, try opening a new tab, logging into an email account, uploading a file, or completing a purchase. If any of those actions fail, check whether a pop-up was blocked. Most browsers show a notification when they block a pop-up — look for a small icon or message at the top of the page. Click it to allow pop-ups from that site if you need to.
Frequently Asked Questions
Why am I still seeing pop-ups if my blocker is on?
Your blocker may be on but disabled for that specific site, or the pop-up may be an overlay (a box on the page itself) rather than a separate window. Check your site settings for that domain and make sure Pop-ups is set to Block. If it is already blocked and you still see overlays, you may need an extension designed for overlay pop-ups.
Will blocking pop-ups break websites I use?
Most websites work fine with pop-up blocking on. Some banking sites, video conferencing tools, or document upload services may need you to allow pop-ups for them specifically. If a site stops working, add it to your allow list in your browser settings, reload the page, and try again.
Is uBlock Origin safe to use?
Yes. uBlock Origin is open-source, meaning its code is publicly available for anyone to review. It does not sell your data or inject ads. It is maintained by volunteers and is one of the most widely used pop-up and ad blockers. Install it from your browser's official extension store, not from a third-party website.
Can I block pop-ups on my phone?
Most mobile browsers have pop-up blockers built in and turned on by default. Chrome on Android and Safari on iPhone both block pop-ups automatically. If you are still seeing them, check your browser settings under Privacy or Security. Mobile extensions are more limited than desktop ones, but some phones support ad-blocking extensions through their browser.
What is the difference between a pop-up blocker and an ad blocker?
A pop-up blocker stops new windows and tabs from opening. An ad blocker stops ads from loading on the page itself — banners, video ads, and sponsored content. You can use both at the same time. Most extensions like uBlock Origin do both, while your browser's built-in blocker usually only handles pop-ups.