Examine source code of Better 9gag

{
  "manifest_version": 2,
  "name": "Better 9gag",
  "version": "2.0.2resigned1",
  "author": "Fabian Große",
  "homepage_url": "https://github.com/Saphareas/Better-9gag",
  "description": "A WebExtension that provides improvements to the browsing experience for 9gag.",
  "icons": {
    "48": "icons/icon-48.png",
    "54": "icons/icon-54.png",
    "90": "icons/icon-90.png",
    "96": "icons/icon-96.png",
    "120": "icons/icon-120.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.9gag.com/*"
      ],
      "js": [
        "lib/jquery-3.3.1.slim.js",
        "lib/better9gag.js",
        "components/night-mode.js",
        "components/video-controls.js",
        "components/nsfw-unlock.js",
        "components/no-social-buttons.js",
        "components/no-ora-tv.js",
        "content.js"
      ],
      "css": [
        "stylesheets/ui-tweaks.css"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "lib/jquery-3.3.1.slim.js",
      "lib/better9gag.js",
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options/options-page.html",
    "open_in_tab": true
  },
  "options_page": "options/options-page.html",
  "web_accessible_resources": [
    "stylesheets/darken-9gag.css"
  ],
  "permissions": [
    "storage",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{568d1651-7212-4167-9943-f507dd1003db}"
    }
  }
}