I had the same requirement
Use GlobalCEFApp.AddCustomCommandLine instead of procedure OnBeforeCommandLine:
GlobalCEFApp.AddCustomCommandLine('--use-fake-ui-for-media-stream', ''));
GlobalCEFApp.AddCustomCommandLine('--enable-media-stream', ''));
GlobalCEFApp.AddCustomCommandLine('--disable-notifications', ''));
Kinkdly regards
Andreas Michelberger
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