Med, to my knowledge this is not an intentional change. Could you file a bug report on crbug.com
? It would also be helpful if you could include a simplified example extension to help the folks triaging the issue easily reproduce the bug and get it directed to the right engineers.
ilyaigpetrov, the Manifest V3 design doc is a launching off point for implementation work and does not necessarily reflect the end product. This API is an example of something we originally intended to deprecate but adjusted our plans for logistical reasons. Our MV3 Migration
docs should be our canonical list of what's intentional. If you see something you think may be a mistake, I'd encourage you to look for and possibly open a new doc bug
or an extension platform bug
Simeon - @dotproto
Chrome Extensions DevRel