lengthen timeouts and improve timeout handling; log js console messages from browser
lengthen timeouts and improve timeout handling; log js console messages from browser

nlevitt/brozzler,vonrosen/umbra,nlevitt/brozzler,nlevitt/brozzler,nlevitt/brozzler,internetarchive/brozzler,nlevitt/brozzler,internetarchive/brozzler,internetarchive/brozzler,internetarchive/brozzler,internetarchive/umbra,vonrosen/umbra