Verified65% confidenceFactExact time
In 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.
3
Sources
65%
Confidence
Long-term
Relevance
7/21/2026
First Seen
Sources
Related Claims
UnverifiedStarting in 2024, Google mandated that all Chrome extensions migrate to the Manifest V3 architecture, which replaces background scripts with on-demand Service Workers and replaces the webRequest API with declarativeNetRequest78% similarUnverifiedStarting in 2024, Google mandated that all Chrome extensions migrate to the Manifest V3 architecture, which imposes stricter restrictions on persistent background operation and network requests.74% similarUnverifiedGoogle unilaterally pushed forward and then rolled back the Manifest V3 extension API changes, affecting the entire browser extension ecosystem that depends on Chromium.74% 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.73% similarUnverifiedStarting with Chrome Manifest V3, Google made major adjustments to the extension permission model, requiring stricter permission declarations and content security policies.72% similar
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