Fullscreen PWA rotation - experiment off

Pixel 6a / Android 17 / Chromium 156.0.8071.0 / 25 Sep 2026

Observation

Installed fullscreen PWA without an orientation lock. With WebAppShortEdgesCutoutMode forced off, viewport-fit=auto measures 411 x 864 before and after landscape; cover measures 411 x 914 before and after. Opening the portrait-locked fullscreen demo afterward stays at 411 x 914. No rotation-induced switch was reproduced on this device. This does not test the reported 156.0.8068.0 build or other devices.

Build, flag and metrics / Auto capture script / Cover capture script / Checksums / Installable probe

Auto - fitted before and after rotation

Auto, cold portrait — Cold portrait: 411 x 864

Auto, back in portrait — Return portrait: 411 x 864

Portrait-locked cover PWA after auto rotation — Then open cover demo: 411 x 914

Cover - full-bleed before and after rotation

Cover, before rotation — Before rotation: 411 x 914

Cover, back in portrait — Return portrait: 411 x 914

Portrait-locked cover PWA after cover rotation — Then open cover demo: 411 x 914