Was native message size limit was reduced recently?

[Salmin Skenderovic]

The maximum size of the message sent to the native messaging host is 64 MB.

The old limit was 4 GB but the new one is 64 MB?

Was this communicated anywhere? I just want to make sure we don't miss such important changes.

Old:

https://web.archive.org/web/20250302130548/https://developer.chrome.com/docs/extensions/develop/concepts/native-messaging

New:

https://developer.chrome.com/docs/extensions/develop/concepts/native-messaging

[Oliver Dunk]

Hi Salmin,

Good spot!

This was not an implementation change, but I recently updated the page to accurately document the limit. The limit has been 64MB for many years but 4GB was incorrectly mentioned in the documentation.

Oliver Dunk | DevRel, Chrome Extensions | https://developer.chrome.com/ | London, GB

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[Jeff Johnson]

What about Firefox and Safari? The MDN docs say 4 GB: https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/Native_messaging

And what happens exactly in Chrome when there is an attempt to send a native message of over 64 MB?