Extensions add features to Chrome that Google doesn't build in

A Chrome extension is a small program that changes how Chrome works. It can add a button to your toolbar, block ads on every website you visit, save passwords differently, change how tabs look, or let you take screenshots. You find extensions in the Chrome Web Store, install them with one click, and they start working right away. Most are free.

Extensions live in your browser, not on your computer. They only work inside Chrome. If you close Chrome, they close too. Each extension you install adds something new — a button, a menu, or a sidebar — that you control from your toolbar.

Key Takeaways

  • The Chrome Web Store is the only safe place to find extensions; search for what you need by name or by what it does.
  • Installing an extension takes one click, and you can remove it just as fast if you don't like it.
  • Extensions ask for permission to access certain parts of Chrome or your websites before they install, and you can see what each one wants.
  • You manage all your extensions from one menu — turn them on and off, change their settings, or uninstall them without restarting Chrome.
  • Some extensions run in the background and work on every site; others only work when you click their button.

Finding extensions in the Chrome Web Store

Open Chrome and go to chrome.google.com/webstore. You'll see a search box at the top. Type what you're looking for — "ad blocker", "password manager", "dark mode", "grammar checker" — and Chrome shows you extensions that do that thing.

Each extension has a card showing its name, a short description, a star rating, and how many people installed it. Click the card to see the full page. Read the description, look at screenshots, and check the reviews. If an extension has thousands of installs and mostly five-star reviews, it's probably safe. If it has ten installs and one review, be cautious.

You can also browse by category. On the Web Store home page, you'll see sections like "Productivity", "Shopping", "Developer Tools", and "Fun and Games". Click a category to see what's popular there.

Installing an extension and understanding permissions

When you find an extension you want, click the blue "Add to Chrome" button. A popup appears asking what permissions the extension needs. Read this carefully. An ad blocker might ask to "read and change all your data on all websites" — that's normal, because it needs to see what's on the page to block ads. A weather extension asking for the same permission is suspicious.

Common permissions include:

  • Read and change all your data on all websites: The extension can see and modify what you see on every page.
  • Read your browsing history: The extension can see which sites you've visited.
  • Access your tabs: The extension can see which tabs you have open.
  • Access your downloads: The extension can see what you've downloaded.
  • Access your location: The extension can know where you are.

If the permissions don't match what the extension claims to do, don't install it. Click "Add extension" to confirm and install.

Finding your extensions and using them

After you install an extension, look at the top right of Chrome, next to the address bar. You'll see a puzzle-piece icon. Click it to see all your extensions. Some have their own button in the toolbar; others only show up in this menu.

If an extension has a toolbar button, click it to use it. For example, a screenshot tool's button opens a menu where you choose what to capture. A password manager's button fills in your login. A dark mode extension's button turns dark mode on and off.

If an extension doesn't have a toolbar button, it works in the background. An ad blocker blocks ads without you doing anything. A grammar checker underlines mistakes as you type. You don't need to click anything — it just works.

Turning extensions on and off, and changing their settings

Click the puzzle-piece icon in the top right, then right-click any extension to see your options. You can "Remove from Chrome" to uninstall it completely. You can click "Manage extension" to open its settings page, where you can change how it works — for example, which websites it runs on, or what colors it uses.

Some extensions have a settings button on their card in the puzzle menu. Click it to jump straight to settings without right-clicking.

To turn an extension off without removing it, click the toggle switch next to its name in the puzzle menu. It turns gray and stops working. Click it again to turn it back on. This is useful if an extension is slowing Chrome down or interfering with a website you're using.

Pinning extensions to your toolbar for quick access

If you use an extension often, pin it to your toolbar so its button always shows. Click the puzzle-piece icon, then click the pin icon next to the extension's name. Its button moves to the toolbar next to the address bar, and you don't have to open the puzzle menu to use it.

You can pin as many extensions as you want, but your toolbar will get crowded. Most people pin three to five. If you pin too many, Chrome hides the extra ones behind the puzzle icon anyway.

To unpin an extension, click the puzzle-piece icon and click the pin icon again. The button moves back into the menu.

Removing extensions you no longer use

Click the puzzle-piece icon, right-click an extension, and select "Remove from Chrome". It uninstalls immediately. Chrome doesn't ask you to confirm — it just removes it. You can always reinstall it later from the Web Store if you change your mind.

Some extensions leave behind data or settings even after you remove them. If you want to completely erase an extension's data, go to Chrome Settings, click "Privacy and security" on the left, then "Clear browsing data". Check "Cookies and other site data" and click "Clear data". This removes all stored data from all extensions, so use it only if you're sure.

Frequently Asked Questions

Can I use the same extension on multiple devices?

Yes, if you sign into Chrome with your Google account on each device. Your extensions sync automatically. When you install an extension on one device, it installs on all your other devices too. You can turn this off in Chrome Settings under "Sync and Google services" if you want different extensions on different devices.

Why does an extension ask for permission to access all websites?

Some extensions need to work on every website you visit. An ad blocker, password manager, or grammar checker has to see every page to do its job. Before installing, check that the extension's description matches the permissions it asks for. If they don't match, the extension might be collecting data it shouldn't.

What's the difference between an extension and an app?

Extensions change how Chrome works and only run inside the browser. Apps are separate programs that run on your computer or phone. Chrome Web Store has both, but extensions are what you install from the browser itself.

Can extensions slow down Chrome?

Yes, especially if you install many extensions or if an extension runs constantly in the background. If Chrome feels slow, try turning off extensions one at a time to see which one is the problem. You can also check Chrome's task manager by pressing Shift+Esc to see which extensions are using the most memory.

Is it safe to install extensions from the Chrome Web Store?

The Chrome Web Store is safer than downloading extensions from random websites, but not every extension is trustworthy. Check the number of installs, the star rating, and the reviews. Look at the developer's name — established companies are usually safer than unknown developers. Read the permissions carefully and ask yourself whether the extension really needs them.