These last few days, it seems that the extensions team has developed a newfound love for the F5 key. We all keep refreshing the "Most recent" page of our new gallery, obsessively checking the newest amazing extensions that developers have uploaded. Today, we get to share this nervous tic with millions of Google Chrome's users. We're launching extensions in the beta channel for Windows and Linux (Mac is in progress). We're also opening our gallery, which, as of now, contains more than 300 extensions!
An extension system has been one of our most requested features for Google Chrome. It's a tribute to Mozilla and the Firefox project that nowadays, users just expect all browsers to have built-in extensibility.
We started the project by presenting a design doc that outlined our vision to create an extensions system based on web technologies - a system that is easy to use, stable, more secure and that wouldn't slow down Google Chrome. It wasn't always easy to balance our goals, and sometimes we had to make tough trade-offs.
Since we built all of this in the open, we had tons of help. Developers started using our code shortly after the first check-in, and have been sending us feedback on our mailing list ever since. Being able to see the extensions people were trying to build and the problems they faced made it more fun to design the system, and motivated us to keep fixing the bugs.
Today, we're really happy to release a beta of extensions that begins to deliver on our initial vision. Extensions are as easy to create as webpages. Users can install and uninstall them quickly without restart, and extensions have a great polished look that fits in with Google Chrome's minimalist aesthetic. When developers upload an extension it is available to users immediately, with limited restrictions and manual reviews only in a few situations.
On the technical side, we've been able to use Google Chrome's multiprocess architecture to help keep extensions stable and safe. And Chromium's extensive performance monitoring infrastructure has helped us ensure extensions affect Google Chrome's speed as little as possible. You can learn more details about the internals of our system in the videos below.