Hi all,

**We're excited to see many people are experimenting with the upcoming
extension features of Chrome in the dev channel. We're getting a lot of
great feedback and are working hard to bring extensions to the stable
channel as quickly as possible.

As part of the latest dev channel release, we've had to make a breaking
change to the crx format. This change adds signatures to our package format,
which are necessary to enable automatic updates. Unfortunately, this means
that any existing extensions will stop working, and will have to be
repackaged.


   - *If you've developed an extension,* you can learn how to repackage your
   extensions for Chrome v 3.0.189.0 in *the packaging
doc<http://dev.chromium.org/developers/design-documents/extensions/packaging>
   * on our developer site. Note that your extension ID will now be your
   public key, so you'll have to change any code that uses that.
   - *If you're using an extension someone else has developed, *you will
   have to reinstall it once the developer has repackaged it (as described
   above). We've already updated our sample
extensions<http://dev.chromium.org/developers/design-documents/extensions/samples>
   .


Even though the whole point of the dev channel is to make our APIs available
early while they're still changing, we don't make these changes lightly.
Once we push the extension system to the stable channel, breaking changes
should be very rare (we'd like to say non-existent, but we don't want to
jinx ourselves).

Let us know if you have any questions or run into any problems.
Cheers,

-Nick

PS: I'll be cc'ing chromium-dev and discuss for a few days, until people
have had the time to subscribe to
chromium-extensions<http://groups.google.com/group/chromium-extensions>.
We also posted this to the chromium blog <http://blog.chromium.org>, which I
recommend subscribing to if you haven't already.

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