Examine source code of Colored Nested Comments

{
  "manifest_version": 2,
  "name": "Colored Nested Comments",
  "description": "CNC is a browser extension which aims to help users quickly identify the level of a nested comments' hierarchy.",
  "version": "1.2resigned1",
  "author": "Jaime Hidalgo García - JaimehRubiks",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.meneame.net/*"
      ],
      "css": [
        "./css/meneame.css"
      ]
    },
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "css": [
        "./css/reddit.css"
      ]
    },
    {
      "matches": [
        "*://*.news.ycombinator.com/*"
      ],
      "css": [
        "./css/hackernews.css"
      ]
    }
  ],
  "icons": {
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6e01f25-bcec-49f3-a53e-e014b61f35ac}"
    }
  }
}