Why not use something like Sauce Labs? I built a screenshotting service on top of them using soda (https://github.com/learnboost/soda https://github.com/learnbo

Why not use something like Sauce Labs? I built a screenshotting service on top of them using soda (https://github.com/learnboost/soda https://github.com/learnboost/soda) a long time ago, and the code's bit-rotted by now, but it was quick and easy, and combined with firefox's full-page-screenshot, you can get some awesome results. Their entry-level plan is free, so you could easily have a "put your Sauce Labs credentials in this file and we'll take screenshots in the background".