Manifest V3

The current version of the Chrome extension manifest format, introduced to improve security, privacy, and performance over Manifest V2 (which is being deprecated). MV3 replaces persistent background pages with service workers, restricts remote code execution, and changes how extensions intercept network requests. Extensions built under MV3 must declare permissions, hosts, and scripts in a manifest.json file, and MV3 adoption has accelerated since Google began phasing out MV2 support.