Examine source code of 9gag post filter

{
  "name": "9gag post filter",
  "description": "A post filter for 9GAG.com",
  "version": "1.1.6",
  "browser_specific_settings": {
    "gecko": {
      "id": "amitbokodev@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "manifest_version": 3,
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "css": [
        "assets/css/content.css"
      ],
      "js": [
        "assets/js/jquery_slim_mini.js",
        "assets/js/content.js"
      ],
      "matches": [
        "https://9gag.com/*"
      ],
      "content_security_policy": "script-src 'self' 'unsafe-inline'; object-src 'self'"
    }
  ]
}