Unverified50% confidenceFactExact time
Starting with Chrome Manifest V3, Google made major adjustments to the extension permission model, requiring stricter permission declarations and content security policies.
1
Sources
50%
Confidence
Long-term
Relevance
9/8/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedStarting in 2023, Google mandatorily enforced the Manifest V3 (MV3) specification, changing the webRequest API from blocking mode to declarative mode and requiring extensions to request permissions at installation time.75% similarUnverifiedManifest V3 is the extension security architecture that Google has been mandating since 2022, which prohibits remote code execution, restricts blob URLs, and strengthens CSP.74% similarVerifiedIn 2023, Google mandatorily migrated the extension ecosystem to Manifest V3, deprecating the persistent background pages allowed in the V2 era in favor of an event-driven mechanism based on Service Workers.72% similarUnverifiedGoogle began promoting the Manifest V3 standard in 2018 and mandated it starting in 2023; MV3 limits the maximum number of dynamic rules to 30,000.71% similar
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