I tried every solution path in MDN Native Messaging Docs
(https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Native_messaging
also
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Native_manifests)
but can't get response from ping_pong.py.

I copied ping_pong.json(also manifest.json too cause clearly not working with ping_pong.json) that specified in docs, can't response in either. By the way, i must tell that some folders didn't exist while i was trying to copy(e.g. /usr/lib/mozilla/native-messaging-hosts). So i created that folder and copied ping_pong.json to there and still can't get response.

The last thing i need to mention, i need to deleted Firefox, before because the snap installation causes problem to Firefox to find profiles. I removed Firefox then installed without snap installation and able to run Firefox for profile changes seamlessly.

Ubuntu version:
Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy

Firefox version:
Mozilla Firefox 107.0.1