Examine source code of MV Premium

{
  "manifest_version": 2,
  "name": "MV Premium",
  "description": "La experiencia definitiva para Mediavida. Potencia el foro con herramientas modernas, navegación fluida y personalización total.",
  "version": "3.4.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "scripting",
    "declarativeNetRequest",
    "*://*.mediavida.com/*",
    "https://platform.twitter.com/*",
    "*://store.steampowered.com/*",
    "https://catalog.gog.com/*",
    "https://api.giphy.com/*",
    "https://generativelanguage.googleapis.com/*",
    "https://api.imgbb.com/*",
    "https://freeimage.host/*",
    "https://api.isthereanydeal.com/*",
    "https://assets.isthereanydeal.com/*",
    "https://dbxce1spal1df.cloudfront.net/*",
    "https://publish.twitter.com/*",
    "https://cdn.syndication.twimg.com/*",
    "https://graphql.anilist.co/*",
    "https://s4.anilist.co/*",
    "*://api.igdb.com/*",
    "*://id.twitch.tv/*",
    "https://itunes.apple.com/*",
    "https://play.google.com/*",
    "https://www.fragrantica.com/*",
    "https://fragrantica.com/*",
    "https://www.fragrantica.es/*",
    "https://fragrantica.es/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mv-premium@adan-dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "120.0"
    }
  },
  "web_accessible_resources": [
    "icon/*.png",
    "assets/*.css"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; connect-src 'self' https://*.mediavida.com https://api.giphy.com https://generativelanguage.googleapis.com https://store.steampowered.com https://catalog.gog.com https://api.imgbb.com https://freeimage.host https://api.isthereanydeal.com https://assets.isthereanydeal.com https://dbxce1spal1df.cloudfront.net https://publish.twitter.com https://cdn.syndication.twimg.com https://graphql.anilist.co https://s4.anilist.co https://api.themoviedb.org https://image.tmdb.org https://id.twitch.tv https://api.igdb.com https://itunes.apple.com https://play.google.com https://www.fragrantica.com https://fragrantica.com https://www.fragrantica.es https://fragrantica.es ; img-src 'self' data: blob: https: http:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com ;",
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "MV Premium",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.mediavida.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/bold-color-early.js",
        "content-scripts/font-early.js",
        "content-scripts/header-controls-early.js",
        "content-scripts/hidden-threads-early.js",
        "content-scripts/hide-header-early.js",
        "content-scripts/homepage-early.js",
        "content-scripts/mv-theme-early.js",
        "content-scripts/post-font-size-early.js",
        "content-scripts/ultrawide-early.js",
        "content-scripts/work-mode-early.js"
      ]
    },
    {
      "matches": [
        "*://www.mediavida.com/foro/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/centered-posts-early.js"
      ]
    },
    {
      "matches": [
        "*://www.mediavida.com/*"
      ],
      "js": [
        "content-scripts/debug.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "*://www.mediavida.com/*"
      ],
      "run_at": "document_end",
      "css": [
        "content-scripts/main.css"
      ],
      "js": [
        "content-scripts/main.js"
      ]
    }
  ]
}