What Chrome extensions do and where to find them
A Chrome extension is a small program that adds a specific feature to your browser — it might block ads, save passwords, translate text, or let you take screenshots. Extensions live in the Chrome Web Store, which is Google's official marketplace. You reach it by clicking the puzzle-piece icon in the top right of Chrome, then selecting "Manage extensions," then clicking "Open Chrome Web Store" at the bottom left.
The Web Store shows you what each extension does, how many people use it, and what permissions it needs. Permissions matter: an extension that needs access to "all your data on all websites" can see everything you type, including passwords and banking information. An extension that only needs to "modify images you upload" is much more limited. Before you install anything, read what permissions it asks for and decide whether they match what the extension actually does.
Key Takeaways
- Extensions are found in the Chrome Web Store, which you reach through the puzzle-piece icon in the top right of your browser.
- Before installing an extension, check what permissions it requests and whether those permissions make sense for what it claims to do.
- You can turn extensions on and off without uninstalling them, and you can see which sites each extension can access.
- Fewer extensions run faster — each one uses memory and can slow your browser, so remove ones you no longer use.
- If an extension stops working or starts behaving strangely, disabling it and restarting Chrome usually fixes the problem.
How to install an extension step by step
Open the Chrome Web Store and search for what you need — "password manager," "ad blocker," "grammar checker," whatever the extension does. Click on the one you want. Read the description, the permissions it needs, and the reviews from other users. If it looks right, click the blue "Add to Chrome" button.
Chrome will show you a popup listing all the permissions the extension needs. Read this list carefully. Click "Add extension" only if you understand and accept what it can access. The extension will install when ready and usually appear as a new icon in the top right of your browser, next to the puzzle piece.
Managing which sites each extension can see
By default, most extensions can see everything you do on every website. You can change this. Click the puzzle-piece icon, find the extension you want to limit, click the three dots next to it, and select "Manage extension." On the extension's settings page, look for "Site access" or "Permissions." You will see options like "On all sites," "On specific sites," or "On click only."
"On click only" means the extension does nothing until you click its icon. This is the safest choice for extensions you use occasionally. "On specific sites" lets you list exactly which websites the extension can access — useful if you have a password manager you only want to work on banking sites. "On all sites" gives it full access everywhere, which you should only choose if the extension genuinely needs it to work.
Turning extensions on, off, and removing them
Click the puzzle-piece icon to see all your extensions. Each one has a toggle switch next to it. Click the toggle to turn an extension off without uninstalling it — it stops running when ready, but you can turn it back on anytime. This is useful if an extension is causing problems or if you want to use it only sometimes.
To remove an extension entirely, click the three dots next to it and select "Remove from Chrome." The extension disappears and you can reinstall it later if you change your mind. If you have many extensions, your browser will run slower — each one uses memory. Remove any you have not used in a month.
What to do if an extension stops working
If an extension suddenly stops doing what it should, first try disabling it and restarting Chrome completely — close all windows and reopen the browser. This fixes most temporary glitches. If it still does not work, check whether the website you are using has changed. Some sites update their code in ways that break extensions that relied on the old code.
If the extension is old and the developer has not updated it in years, it may no longer work with the current version of Chrome. Check the Chrome Web Store page for that extension — if the last update was more than a year ago, the developer may have abandoned it. You can look for a newer extension that does the same thing, or contact the developer through the Web Store to ask if they plan to fix it.
Understanding extension permissions and privacy
Extensions can request permission to read your browsing history, see your passwords, access your location, or read everything you type. Before you install an extension, ask yourself: does this extension actually need that permission to work? A screenshot tool does not need to see your passwords. A dictionary does not need to know your location. If an extension asks for more than it needs, that is a red flag.
Check the reviews on the Web Store. If many users complain that an extension is slow, crashes Chrome, or behaves strangely, skip it. Look for extensions with thousands of users and recent updates — that usually means the developer is actively maintaining it. If you are concerned about privacy, choose extensions from well-known companies or open-source projects where the code is public and reviewed by many people.
Organizing extensions so you can find them
If you install many extensions, the top right of Chrome becomes crowded. You can organize them by right-clicking the puzzle-piece icon and selecting "Manage extensions." From there, you can group extensions by category or hide the ones you use rarely. You can also right-click individual extension icons and choose "Hide in Chrome menu" — the extension still works, but its icon disappears from view.
Another option is to use extension folders. Some extensions, like tab managers or note-takers, let you organize their own internal data into folders. Check the extension's settings to see if this is possible. Keeping your extensions organized makes it easier to find the one you need and easier to spot if a new icon appears that you did not install.
Frequently Asked Questions
Can extensions see my passwords and banking information?
Extensions with permission to "access your data on all websites" can see anything you type, including passwords and credit card numbers. This is why you should only install extensions from sources you trust and limit their site access to where you actually need them. Use "On click only" for extensions you do not use constantly.
Why is my browser running slowly after I installed extensions?
Each extension uses memory and can slow your browser, especially if you have many running at once. Disable or remove extensions you no longer use regularly. You can also check which extensions are using the most memory by typing chrome://system into the address bar, though this shows technical information that may be hard to interpret.
What does "This extension can read and change your data" mean?
It means the extension can see what is on the website you are visiting and modify it before you see it. A grammar checker needs this to underline misspelled words. An ad blocker needs this to hide ads. But it also means the extension could theoretically change content maliciously, which is why you should only install extensions you trust.
Can I use the same extension on multiple computers?
Yes. If you sign into Chrome with your Google account on another computer, your extensions will automatically install on that computer too. Your extension settings and data will sync across devices. If you do not want an extension on a particular computer, you can disable it just on that device without affecting your other computers.
How do I know if an extension is safe?
Check the number of users and the date of the last update — extensions with thousands of active users and recent updates are usually safer. Read the reviews for complaints about privacy or crashes. Look at the developer's name and see if it is a known company. Avoid extensions with vague descriptions or no reviews. When in doubt, search the extension name plus "safe" or "review" to see what other people say about it.