Examine source code of DevStory

{
  "name": "DevStory",
  "version": "1.0.3",
  "description": "All Your Favorite News Feeds in every new tab, you never miss anything.",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "img.png"
  },
  "chrome_url_overrides": {
    "newtab": "popup.html"
  }
}