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About this Add-on
Follow the Wikipedia Lookup Add-on on Twitter to keep up with the latest developments:
The current version only has support for the languages with 10000+ articles in Wikipedia.
I will add support for all languages in the next major release of the extension. The next release will also include some other new features that people have mentioned in the comments. If you want to try out theses features now, have a look at the development blog.
This new architecture will make it easier to push out new releases, so stay tuned!
And I apologize for being so late with being Firefox 3.6 compliant...
This add-on is not compatible with your version of Firefox because of the following: