The add-on is primary provided through Google Play app market and we suggest to use only this way. Links to download add-on are bellow:
For beta testers, we provide actual beta builds which are published via Google Play beta channel. To get beta builds, you only have to click on Become a beta tester link and follow instructions on that page. Then the beta builds will be automatically installed and updated when a new beta version is released. Always you can leave beta builds with clicking on Become a beta tester link again and following instructions on that page.
For advanced users, we also provide direct links to APK files:
Automatic add-on update do the Google Play app itself, so user has to take care himself. We do not provide support for older versions.
Latest version for Android 2.x devices
Since add-on version 2.0 we dropped support for Android 2.x devices. The latest add-on working version 18.104.22.168 you can install manually from here. (Note: For manual install of this APK file you will probably need to allow installing applications from external sources on your Android device.)