The Web Bluetooth API
Modern web browsers are incredibly powerful, capable of interacting directly with your computer’s hardware. Google Chrome supports the Web Bluetooth API, which allows specific, authorized websites to communicate directly with Bluetooth devices nearby (like a heart rate monitor, a smart bulb, or specialized medical equipment). While this is useful for specific web apps, it poses a significant privacy and security risk. If a malicious or poorly coded website attempts to scan for devices, Chrome might automatically prompt you to connect to a nearby Bluetooth device, interrupting your browsing with a persistent popup asking for pairing permission.
Revoking Web Bluetooth Permissions
To secure your local hardware and stop Google Chrome from automatically attempting to connect to Bluetooth devices or prompting you to pair them via websites, you must disable the Web Bluetooth API in your site settings.
Open Google Chrome. Click the three vertical dots in the top-right corner of the window and select Settings. In the left-hand navigation pane, click on Privacy and security. In the main window, click on Site Settings. Scroll down the page and click to expand the Additional permissions section. Look for the option labeled Bluetooth devices. Click on it. You will see an option governing how sites interact with your hardware. Change the default behavior by selecting the radio button next to Don’t allow sites to connect to Bluetooth devices. By enforcing this strict block, no website will ever be able to trigger Chrome’s Bluetooth scanning or pairing prompts, completely securing your local devices from web-based interference.