Expired50% confidenceFactExact time
Firefox retains the MV2 API while supporting MV3, allowing uBlock Origin to continue operating with full capabilities.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/21/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/19/2026(expired)
Sources
Related Claims
UnverifiedFirefox adheres to the MV2 standard, enabling uBlock Origin to utilize the full capabilities of its filtering engine.84% similarUnverifiedMozilla Firefox, while implementing the MV3 API, has explicitly announced that it will continue to support MV2's webRequest blocking capability77% similarUnverifiedPlaywright's support for Firefox and WebKit is not achieved directly through CDP, but through dedicated debugging protocols implemented in cooperation with the respective browser teams.59% similar
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