F'n Google is at it again and this may affect Firefox users in the near future...
UPDATE: A kind reader just sent me this...
Manifest v3 update (Mozilla Add-ons Community Blog, 27-May-2021)
declarativeNetRequest
Google has introduced declarativeNetRequest (DNR) to replace the blocking webRequest API. This impacts the capabilities of extensions that process network requests (including but not limited to content blockers) by limiting the number of rules an extension can use, as well as available filters and actions.
After discussing this with several content blocking extension developers, we have decided to implement DNR and continue maintaining support for blocking webRequest.
This blog post does not appear to be concrete however so we'll see what happens, but considering some of the shit the Morons@Mozilla corporate have pulled in the past, i'm not putting any stock in anything they say.
Chrome Users Beware: Manifest V3 is Deceitful and Threatening | Electronic Frontier Foundation
Manifest V3, Google Chrome’s soon-to-be definitive basket of changes to the world of web browser extensions, has been framed by its authors as “a step in the direction of privacy, security, and performance.” But we think these changes are a raw deal for users. We’ve said that since Manifest V3 was announced, and continue to say so as its implementation is now imminent. Like FLoC and Privacy Sandbox before it, Manifest V3 is another example of the inherent conflict of interest that comes from Google controlling both the dominant web browser and one of the largest internet advertising networks.
Manifest V3, or Mv3 for short, is outright harmful to privacy efforts. It will restrict the capabilities of web extensions—especially those that are designed to monitor, modify, and compute alongside the conversation your browser has with the websites you visit. Under the new specifications, extensions like these– like some privacy-protective tracker blockers– will have greatly reduced capabilities. Google’s efforts to limit that access is concerning, especially considering that Google has trackers installed on 75% of the top one million websites.
It’s also doubtful Mv3 will do much for security. Firefox maintains the largest extension market that’s not based on Chrome, and the company has said it will adopt Mv3 in the interest of cross-browser compatibility.