================ Remote Debugging ================ You can use the :doc:`Firefox developer tools <../index>` on your desktop to debug Web sites and Web apps running in other browsers or runtimes. The other browser might be on the same device as the tools themselves or on a different device, such as a phone connected over USB. The detailed instructions for connecting the developer tools are specific to the runtime. You can connect the developer tools to Gecko-based runtimes like Firefox Desktop, Firefox for Android, and Thunderbird. - :doc:`Firefox Desktop ` - Firefox for Android :doc:`over USB <../about_colon_debugging/index>` - :doc:`Thunderbird `