Interesting but i'll pass on this one.
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For valid extensions, the Installed extensions section in the Extensions manager, displays the confirming information.
Uninstalling or disabling the extensions is also just a matter of a single click from the extensions page.

But all this brouhaha for just three sample extensions! It could be a big letdown, if not for third party developers working behind the scenes on extensions of their own. I can straightaway suggest to you two sites that could empower your browser by a bit…

Chromeextensions
Chromeplugins

These sites are not associated to Google but are merely a place for independent developers. But they are the groundbreakers in every sense of the word as Chrome tries to become the internet’s Swiss army knife like Firefox. The salvo has been fired by Google. With time it could be a toss-up between browsers. We just have to pick the browser we want.