WebSerial for Firefox WebSerial API Polyfill for Mozilla Firefox browser Introduction This add-on allows to use the WebSerial API in Firefox. It uses a native application to communicate with serial ports. NOTE: Currently, the add-on only works on Windows and Linux (x86-64). Installation The add-on is available for download from Mozilla Addons: WebSerial for Firefox. The native application needs to be installed on the computer first. The GUI will offer to download the native application when you ...