Rated 5 out of 5 stars

Very good extension! But can you add yandex.ru search engine? It is very popular in Russia, also have international version.

Format of query is like this:
http://yandex.com/yandsearch?text=url%3Ahttp%3A%2F%2Fexample.com%2F&lr=47

or in Russian:
http://yandex.ru/yandsearch?text=url%3Ahttp%3A%2F%2Fexample.com%2F&lr=47

And will be good to see the overview page, that shows cache availability and date for all items, like SeoQuake extension (Google cachedate for example).