Mozilla’s approach to Manifest V3: What’s different and why it matters for extension users

Google began phasing out Manifest V2 last year and plans to end support for extensions built on it by mid-2025. That change has real consequences: Chrome users are already losing access to uBlock Origin, one of the most popular ad blockers, because it relies on a Manifest V2 feature called blockingWebRequest.

I'm actually a little bit surprised that Mozilla directly calling out Google by name and what they do, in an explicit manner.

Yup, still no ads.

Mozilla’s approach to Manifest V3 prioritizes user choice and control, offering developers more APIs and supporting both Manifest V2 and V3. This contrasts with Google’s approach, which limits extension functionality and will phase out Manifest V2 by mid-2025.