Works great on Firefox for Android (currently Beta and Nightly allows installation). Edit: still works great on Android, but for some reason, AMO has now hidden this from available Android extensions. The already installed addon works in my browser, but if I were to remove it manually, or make a fresh reinstall of Firefox Android Beta / Nightly, I wouldn't be able to add this again. Shame. It should be enabled, as this is a very useful addon.