I have a full month of stats to analyze now, so here's what I know so far:
The extension has been downloaded 61 times from Google's Web Store and 79 from chromeextensions.org.
Its background page has been loaded 4,068 -it means 4,068 Chome browsers where opened with my extension installed- but only 522 click events where registered: those are the actual times my extension has been used. This means a 13% of actual usage... still can't tell if this is reasonable or not.
As for the most used search engines:
I've stripped all the querystring parameters in order to compile different implementations for the same Search Engine (for expample, some people send sort parameters on some of their Search Queries).
I guess I should also group those like google.it + google.ro + google.com.uy but it doesn't make much of a difference, right?
As you can see, IMDB is the winner this time, but in general terms, the extension seems to be used more for translation than from anything else.
Well, here's the list: