Examine source code of Hackernews Comment Colors

{
  "manifest_version": 2,
  "name": "ColorCodedComments",
  "version": "1.0",
  "description": "Highlights comment links on Hackernews according to how many comments there are.",
  "icons": {
    "32": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.news.ycombinator.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}