

A manifest may contain an "update_url" field, pointing to a location for doing update checks.Extension developers should be careful about updating extensions that have a dependency on the native binary (for example, legacy extensions using NPAPI). However, extensions hosted on the Chrome Web Store are updated via the Chrome update mechanism which developers do not control.

Previously when off-store extensions were supported, it was possible to have the native binaries and the extension be updated in lock step.

Warning: As of M33, Windows stable/beta channel users can only download extensions hosted in the Chrome Web Store (see Protecting Windows users from malicious extensions).
