The simplest way to block ads
The fastest way to stop ads is to install an ad blocker extension in your browser. An extension is a small program that runs inside your browser and filters out advertisements before they load on the page. Most ad blockers work the same way: they recognize ads by their source or appearance, then hide them or prevent them from downloading at all.
Popular ad blockers include uBlock Origin (free, open-source, and widely recommended), Adblock Plus (free with optional paid features), and AdGuard (free and paid versions). You install one from your browser's extension store — the Chrome Web Store for Chrome, Add-ons for Firefox, or the equivalent for Edge or Safari — and it starts working when ready on almost every website you visit.
The trade-off is straightforward: ad blockers use your computer's memory and can occasionally break a website's layout or functionality. Some websites detect ad blockers and ask you to turn them off or pay for ad-free access. For most people, the benefit of fewer ads outweighs these minor inconveniences.
Key Takeaways
- Ad blocker extensions install in seconds from your browser's store and work on nearly all websites without further setup.
- uBlock Origin is free, lightweight, and does not sell your data, making it the most common choice for people who want straightforward ad blocking.
- Some websites will not load properly with ad blockers on, and you can disable the blocker for just that site without turning it off everywhere.
- Built-in browser settings can reduce tracking and some ads, but they are less effective than extensions and work differently across browsers.
- If a website blocks you for using an ad blocker, you can whitelist that site in your extension settings to let ads load there while blocking them elsewhere.
Installing an ad blocker extension
Open your browser and go to its extension store. In Chrome, click the three-dot menu in the top right, select "Extensions," then "Open Chrome Web Store." In Firefox, click the menu button (three horizontal lines), select "Add-ons," then search from there. In Edge, click the three-dot menu and choose "Extensions."
Search for "uBlock Origin" or another ad blocker you have chosen. Click the extension's name, then click the blue "Add to [Browser]" button. A popup will ask for permission — read it to understand what the extension can do, then confirm. The extension icon will appear in your toolbar, usually in the top right corner of the browser window.
That is all the setup required. The ad blocker starts filtering when ready. You do not need to restart your browser or change any settings unless you want to customize which sites it blocks on or adjust its filtering strength.
What happens when a website detects your ad blocker
Some websites — news sites, streaming services, and content creators especially — detect when you are using an ad blocker and respond in one of three ways. They may show a message asking you to turn it off, they may prevent the page from loading until you do, or they may straightforward let you browse but show a banner reminding you that ads support their work.
You have two options. The first is to whitelist the site in your ad blocker. Click the extension icon in your toolbar, find the toggle or button that says "disable on this site" or "whitelist," and confirm. Ads will load on that site from then on, but your blocker will still work everywhere else. The second option is to straightforward leave the site and find the information elsewhere.
Some people whitelist sites they want to support. Others whitelist sites where ads do not interfere with reading. There is no right answer — it depends on whether you value the site's content enough to see its ads.
Built-in browser settings that reduce ads and tracking
Every major browser has settings that block some ads and trackers without needing an extension. These are not as thorough as ad blockers, but they work if you prefer not to install additional software.
In Chrome, click the three-dot menu, go to "Settings," then "Privacy and security." Turn on "Enhanced protection" to block some trackers and malicious ads. In Firefox, go to "Settings," select "Privacy & Security," and under "Enhanced Tracking Protection," choose "Strict." In Edge, click the three-dot menu, go to "Settings," then "Privacy, search, and services," and turn on "Tracking prevention" at the "Strict" level.
These settings reduce the number of ads you see and limit how much websites can track you, but they do not remove ads the way an extension does. They are a middle ground for people who want some protection without installing an extension.
Why ad blockers use your computer's memory
An ad blocker works by checking every element on a webpage — images, scripts, links — against a list of known ad sources. This checking happens in the background every time you load a page. The larger the blocker's filter list, the more memory it uses.
uBlock Origin is popular partly because it uses less memory than competitors while blocking just as many ads. Adblock Plus and AdGuard use more resources but offer additional features like password management or VPN services. If your computer is old or has limited memory, uBlock Origin is the better choice. If you have a newer computer, the difference will be barely noticeable.
Blocking ads on mobile devices
Mobile browsers work differently from desktop browsers, and most do not support extensions the way desktop versions do. On iPhone and iPad, Safari allows some content blockers through its settings, but they are limited. On Android, Firefox supports extensions including uBlock Origin, while Chrome does not.
If you use Chrome on Android, your best option is to enable Chrome's built-in ad filtering. Open Chrome, tap the three-dot menu, go to "Settings," then "Privacy," and turn on "Block intrusive ads." This is not as effective as an extension, but it removes the most aggressive ads without requiring additional software.
If you use Firefox on Android, you can install uBlock Origin the same way you would on desktop — search for it in Firefox's add-ons menu and install it. The extension will then block ads in Firefox on your phone.
When an ad blocker breaks a website
Occasionally, an ad blocker will block something that is not an ad — a button, a menu, or a piece of content — because it matches the filter list's rules. The page might look broken or refuse to load. This is rare, but it happens.
The fix is straightforward: click the ad blocker icon in your toolbar and look for a toggle or button labeled "disable on this site," "turn off," or "whitelist." Click it, then reload the page. The site will load normally. You can turn the blocker back on for other sites when ready — whitelisting affects only that one domain.
If you want to report the broken site to the ad blocker's maintainers, most extensions have a feedback or report button in their settings. Developers use these reports to refine their filter lists so fewer sites break in the future.
Frequently Asked Questions
Do ad blockers slow down my browser?
Slightly, but usually not noticeably. uBlock Origin adds minimal overhead. Heavier blockers like Adblock Plus may slow older computers, but modern computers handle the memory use without issue. If you notice slowness, try uBlock Origin instead, or disable the blocker on sites you visit frequently.
Can websites see that I am using an ad blocker?
Yes, websites can detect ad blockers by checking whether ads loaded. Some use this to show a message or block access. You cannot hide the fact that you are using one, but you can whitelist individual sites so ads load there while remaining blocked elsewhere.
Is it legal to use an ad blocker?
Yes, ad blockers are legal in most countries. Websites can ask you to turn them off or refuse service to users with blockers enabled, but they cannot punish you for using one. The legal status varies slightly by country, but in the United States and Europe, ad blockers are permitted.
Will an ad blocker protect me from malicious ads?
Ad blockers remove most malicious ads before they load, which is one reason people use them. However, they are not a complete security solution. Use an ad blocker alongside other practices like keeping your browser updated, avoiding suspicious links, and running antivirus software.
What is the difference between uBlock Origin and Adblock Plus?
uBlock Origin is free, open-source, and uses less memory. Adblock Plus is also free but offers a paid version with extra features and uses more resources. Both block ads effectively. uBlock Origin is recommended for most people because it is simpler and lighter.