There are some Android devices which other people have already built and installed Firefox OS for. If you have a Galaxy S2 and Nexus 5 it may be a bit easier to port Firefox OS - however, there is always the risk of bricking your device and making it useless. Please also be aware that not all features of Firefox OS may work correctly on a ported build. If you are curious to know more, you may find information on these sites: * [https://developer.mozilla.org/en-US/Firefox_OS/Installing_on_a_mobile_device Installing Firefox OS on a mobile device] * [http://nexus5.wonderhowto.com/how-to/install-firefox-os-other-experimental-roms-your-nexus-5-without-any-risk-0150964/ How to Install Firefox OS (& Other Experimental ROMs) On Your Nexus 5] You can also try the Firefox OS by running the simulator in your Firefox browser. Please check the following article for instructions: * [https://support.mozilla.org/en-US/kb/how-set-firefox-os-desktop-build#w_run-the-firefox-os-simulator] If you are an advanced user and would like to learn more information about manually porting Firefox OS to your specific device, you can go to MDN (Mozilla Developer Network): * [https://developer.mozilla.org/en-US/Firefox_OS/Porting] We hope you find this information helpful. Please let us know if you have any other questions.