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Engine r18
Pre-release
Pre-release
Chromium 156.0.8078.88, preserving the existing security and extension patch baseline.
Adds source-window activation and an additive native developer-tools hosting API. Includes the previous lifecycle, allocator-purge and bounded preconnect API additions without enabling new product policies.
Qualified with API-prefix compatibility, native PiP return/close, all four developer-tools placements, and existing diagnostics/extensions, security/media/history and performance smokes. Full application validation and owner video approval remain separate from this engine distribution.
Infrastructure prerelease only; does not update the browser release channel.