Extensions documentation has moved!  If you want to learn more about how to create extensions, go to our extension developer website at http://code.google.com/chrome/extensions/index.html which includes reference documentation, samples, tutorials, FAQs, discussion groups and even videos.

These are a list of design documents that talk about the current underlying architecture of extensions, proposed new features and even old ideas that were never implemented or have since changed.  This is not meant to serve as a reference for people developing extensions, but rather is for engineers building the extensions system.

Initial proposals for APIs that have already been implemented.  The APIs may have changed from their initial proposals.

Design docs for how parts of the extensions system work.

Design docs that were rejected or are no longer applicable.