javascript - Is it allowed to use window.postMessage() in a chrome extension? -

i have finished coding extension chrome , firefox (webextensions). have used window.postmessage() communication between website script , extension , works.

but reading there methods chrome (https://developer.chrome.com/extensions/messaging) chrome.runtime.sendmessage()to send messages. extension rejected if use window.postmessage() have recode everything?

yes, valid way of communication - between page , content script.

in fact, if @ content script documentation, lists postmessage way of communication content script.

the method described @ messaging documentation allows cut out content script middleman, , provides degree authentication messages (only indended recipient receive them), providing configured "externally_connectable".

but "externally_connectable" not supported in firefox yet, , can't find bug tracks implementation.