Good news for extension developers: as of today, extensions are turned on by default on Google Chrome's dev channel.
Extensions are small pieces of software that developers can write to customize the way Google Chrome works. We've been working on enabling extensions for a while, but until now, they were hidden behind a developer flag. As of today, this is no longer true. If you're on the dev channel, you can try installing some of our sample extensions.
Removing the flag is the first step in our launch process, and it means we're ready for a few more people to start using extensions-- the kind of adventurous people who populate the dev channel.