Examine source code of 9GAG-Extension

{
  "name": "9GAG-Extension",
  "version": "0.3",
  "description": "Series of quality-of-life changes and features for 9GAG.",
  "manifest_version": 2,
  "icons": {
    "48": "Assets/icons/9gag-50.png"
  },
  "browser_action": {
    "default_icon": "Assets/icons/9gag-50.png",
    "default_title": "9gag Master",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.9gag.com/*"
      ],
      "js": [
        "main.js"
      ]
    },
    {
      "matches": [
        "*://*.9gag.com/gag/*"
      ],
      "js": [
        "post.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "*://*/*"
  ]
}