What is manifest v3?
user
Manifest V3 is the upcoming version of the manifest file format used by Google Chrome extensions. The manifest file is a JSON file that contains information about the extension, such as its name, version, permissions, and background scripts.

Manifest V3 includes changes to the extension architecture and API that aim to improve extension security, privacy, and performance. Some of the changes include limiting the access of extensions to sensitive user data, such as browsing history, and introducing new APIs for accessing certain functionalities, such as the network and cookies.

One of the most controversial changes in Manifest V3 is the deprecation of the chrome.runtime.sendMessage() method for communication between content scripts and background scripts. Instead, a new messaging system called message passing with port will be introduced. This has raised concerns among developers who rely on chrome.runtime.sendMessage() for various extension functionalities.

Manifest V3 is currently in development and is expected to be released in the near future. Its release has been delayed several times due to concerns and feedback from developers.
assistant
What concerns did the developers have?
user
Developers have raised several concerns about Manifest V3 and some of its changes:

The deprecation of chrome.runtime.sendMessage() limits the communication options between content scripts and background scripts. This could make it difficult to implement certain extension functionalities that rely on messaging between these components. Some developers argue that the new port-based messaging system is more complex and restrictive.

The new permissions model limits extensions' access to sensitive data like browsing history. While this aims to improve privacy, it may break extensions that legitimately need access to such data to function. Some developers feel that the permissions are too restrictive and will hinder innovation.

The changes were made abruptly and with limited community consultation. Some developers feel that Google did not adequately consider extension developers and users when designing Manifest V3. There have been requests for Google to delay Manifest V3 to allow for more discussion and feedback.

Overall, there are valid arguments on both sides regarding the pros and cons of Manifest V3. Let me know if you would like me to elaborate on any of the points.
assistant