Browser 1.5 * More standard-compliant Media Session API (Bug 406782, Bug 401636) * Call into native Media Session API if browser supports it (e.g. Chrome since 73) * Consult Media Session playbackState more often (Bug 402324) * Support "stop" Media Session action handler * Handle reparenting player inside DOM properly * Apply Breeze scroll bars only on HTML tag, avoids overriding custom website scroll bars * Improved favicon handling in tabs runner