FireX Proxy
Firefox add-on: https://addons.mozilla.org/firefox/addon/firex-proxy/
Google Chrome extension: https://chrome.google.com/webstore/detail/firex-proxy/jccfbhillgcekaepchoahodacnlhcbnj
Wiki: https://github.com/Exclumice/FireX-Proxy/wiki
Issues: https://github.com/Exclumice/FireX-Proxy/issues