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Remote Debugging
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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 <debugging_firefox_desktop/index>`
- Firefox for Android :doc:`over USB <../about_colon_debugging/index>`
- :doc:`Thunderbird <thunderbird/index>`
