How to see what browser information sites can access

Websites can learn some details about your browser and device, and may ask for permission to use your camera, microphone, or location. It can be hard to tell what is available before a site asks.

Use the Browser Info test to inspect details your browser reports, including its version, permissions, privacy settings, codecs, and supported features. Then check the permissions you have granted to individual sites.

Check what your browser reports

1. Open the Browser Info test in the browser you want to check.
2. Review the browser version and engine, then look through the permissions and privacy information. These details describe what the browser reports in its current setup.
3. Check the codecs and supported features. A website can use supported browser features, but this does not mean every site is using them or collecting data from them.
4. For a particular website, open it and select the site information or permissions icon beside the address bar. Review which permissions are allowed, blocked, or set to ask.

Check each browser separately. Chrome, Edge, Firefox, and Safari can have different settings, and a permission granted in one browser does not automatically apply in another.

What the result means

Browser details are listed

Your browser makes some technical details available to pages. These can include its version and engine, language, time zone, screen size, and which web features it supports. Sites may use these details to make pages work properly, such as choosing a compatible video format.

Some sites combine several details to create a browser fingerprint, a set of characteristics that may help distinguish one browser from others. The Browser Info test shows information your browser reports, but it does not measure every tracking method or tell you what a particular site stores.

A permission is allowed

Allowed means the browser may let a site use that feature under the permission's rules. Check the permission for the specific site, not only the general browser report. For example, a camera permission for one video call site does not mean every website can turn on your camera.

A permission is blocked or set to ask

Blocked means the site cannot use that feature through the browser permission. If it is set to ask, the browser should request permission when a site tries to use it. You can leave access blocked unless you need the feature.

You do not see a detail you expected

Browsers deliberately limit or reduce access to some device information. For example, a browser can provide only a rounded hint about RAM, not the exact amount. A missing detail does not prove that a website has no way to make an estimate, and the test is not a complete audit of a site's behavior.

Limit what websites can access

1. Review permissions for the site. Open the site, select the icon beside the address bar, and change camera, microphone, or location access to Ask or Block if you do not need it. The icon and wording vary by browser.
2. Check global browser permissions. In Chrome, open Settings › Privacy and security › Site settings. In Edge, open Settings › Cookies and site permissions. Review the individual permission categories and remove access for sites you no longer use.
3. Limit camera and microphone access in Windows. On Windows 11, open Settings › Privacy & security › Camera and Settings › Privacy & security › Microphone. Review device access and desktop app access. Browser permissions still control which websites can request these devices.
4. Limit camera and microphone access on a Mac. Open System Settings › Privacy & Security › Camera and System Settings › Privacy & Security › Microphone. Turn off access for a browser if you do not want it to use that device. You can also manage website access in the browser.
5. Review location access. On Windows 11, open Settings › Privacy & security › Location. On a Mac, open System Settings › Privacy & Security › Location Services. A website can also receive an approximate location from your public IP address without using the browser's precise location permission.
6. Clear access you no longer need. Remove saved site permissions in your browser's site settings. You can also clear cookies and site data, though this may sign you out and does not change what a site can request next time.

What a website can still learn

A website's server receives your public IP address as part of the connection. Your internet provider and approximate region may be associated with it, but it is not the same as precise GPS location. A site only gets precise browser location when you grant location permission.

Websites also receive information needed to display and run pages, such as browser capabilities. The Browser Info test helps you see some of those capabilities, but it cannot show what a separate website logs on its servers, what data it links to your account, or what trackers it uses. For sensitive permissions, deny access unless the site needs the feature for something you chose to do.