Restructure browser.py to take screenshot after behavior script.
Restructure browser.py to take screenshot after behavior script.

internetarchive/brozzler,internetarchive/brozzler,nlevitt/brozzler,nlevitt/brozzler,internetarchive/brozzler,nlevitt/brozzler,nlevitt/brozzler,nlevitt/brozzler,internetarchive/brozzler