Chrome-Stats extension
postMessage-catcher
A Chrome extension that captures the content of postMessage.
What is postMessage-catcher?
"postMessage-catcher" is a Chrome extension specifically developed to create an efficient debugging environment. It captures all messages being posted and received on the current page, making it easy to monitor and debug communication instances with other iframes present on the page. It welcomes open-source contributions to the project on Github.
Stats
By: yangjin
Users: 1,000+
Rating: 3.00
(2)
Creation date: 2021-06-06
Risk impact: Low risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
- storage
Size: 768.00K
Email: ya*****@gmail.com
Stats date:
Other platforms
Not available on Firefox
Not available on Edge
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Summary
An effective development tool to help you capture all messages posted and received on the current page.
It aims to provide an easier debugging experience when you need to communicate with other iframes.
Contributions are welcome to the Github project.
User reviews
Tried this in Jan 2023 to understand how the youtube javascript embed API interacts over postMessage. This extension doesn't catch or report any of the postMessages that may happen in sub-iframes (e.g. not in the top window). So if you prototype something in codepen or whatever you won't see the postMessages in this extension. It appears (limited testing) it only reports postMessages RECEIVED by the top window...so you don't even see postMessages sent by the top window to child iframes. This makes this extension pretty useless as you can add a single "message" listener that logs messages in the devtools console to accomplish the same thing.
by 
Matt P, 2023-01-20
Matt P, 2023-01-20Safety
Risk impact
postMessage-catcher is relatively safe to use as it requires very minimum permissions.
Risk likelihood
postMessage-catcher has earned a fairly good reputation and likely can be trusted.
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