   'Check privacy-focused extensions like uBlock Origin settings'
                    ]);
            }
            
            if (restrictions.includes('STUN server connection might be blocked')) {
                addCheckItem('error', 'STUN Server Blocked', 
                    'Cannot connect to STUN servers to determine your public IP address. This means only local candidates will be available.',
                    [
                        'Check firewall settings',
                        'Verify n