In the releases page (https://github.com/atom/atom-shell/releases), there are two zip files for each platform in a release, one with symbols in the file name and one without. I'm not sure what are the differences between the two, perhaps the "symbol" versions contain extra debugging information? Whatever it means, I think it should be mentioned in README.md.

Maybe a link to docs/tutorial/using-selenium-and-webdriver.md or a short description for chromedriver downloads is also needed (in README.md).