title: JavaScript Injection using Firefox Mobile
body: <p>I would like to inject JavaScript into a website on a mobile browser (in this case on android). However, most mobile browsers do not seem to support any kind of plug-ins (except for Firefox, correct me if I am wrong). </p>
  
  <p>Firefox support for mobile plugin development seems to be minimal too, for example one can not install xpi-files by downloading them (I have yet to find out how one can install a plugin that is not hosted on the <a href="https://addons.mozilla.org/de/android/" rel="nofollow noreferrer">add-ons for android site</a>)</p>
  
  <p>Why not use existing solutions?</p>
  
  <p>The best way to inject javscript would be Greasemonkey but this is not supported on mobile. Scriptish supposedly is but I could not install it on any device. There are android browsers specifically written to support Greasemonkey scripts (<a href="http://fatape.appsdomain.nl/" rel="nofollow noreferrer">Fat Ape</a> or <a href="https://play.google.com/store/apps/details?id=net.biniok.tampermonkey&amp;hl=de" rel="nofollow noreferrer">Tampermonkey</a> or <a href="http://oilcan.jsharkey.org/" rel="nofollow noreferrer">OilCan</a>) but these are not used by many and while they enable JavaScript injection the lack in their support for other browser-features.</p>
  
  <p>What exactly is my question?</p>
  
  <p>My experience in Firefox-Plugin development is minimal so I would like to know: Is there something that would prevent something like <a href="https://stackoverflow.com/questions/2879669/firefox-extension-how-to-inject-javascript-into-page-and-run-it?rq=1">this</a> to run on FF-Mobile? Could it be done with other browsers too? I don't actually need the full power of Greasemonkey, injecting the same few lines into any website would probably do.</p>