Examine source code of ext

{
  "manifest_version": 2,
  "name": "ext",
  "version": "0.3.2",
  "content_scripts": [
    {
      "matches": [
        "https://ionisx.com/courses/*",
        "https://courses.ionisx.com/*"
      ],
      "js": [
        "global_var.js",
        "config.js",
        "dates.js",
        "content.js"
      ],
      "css": [
        "added.css",
        "changed.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "global_var.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "./icons/icon32.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://www.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{591a2be9-599d-4a4b-9e72-1556df79ddb5}"
    }
  }
}