Rated 1 out of 5 stars
Just type "extension list" (without quotes) into the AMO search field and press the Enter key. Sorted by relevance, both the Sogame and Iceberg versions will appear at the top of the results. Click accordingly.
At this time, I would not have given this extension a 5-star rating. Primarily since this extension, as it exists today, does not work with current versions of Firefox.