We also wanted to take this opportunity to address a couple common questions we’ve been seeing in the community, specifically around the webRequest API and MV2:
The webRequest API is not on a deprecation path in Firefox
Mozilla has no current plans to deprecate MV2 as mentioned in our previous MV3 update
That said, I believe Firefox users have gotten a lot of benefits by having extensions made that work in both Firefox and Chromium-based browsers. I don't believe there will still be as much effort for a Firefox-only extension but I believe there will be a sufficient number of motivated users and developers to still develop blockers and other extensions that take advantage of Firefox continuing to support MV2 and webRequest.