Examine source code of DA Friends 2

{
  "manifest_version": 2,
  "name": "__MSG_ext_name__",
  "version": "2.0.229",
  "default_locale": "en",
  "description": "__MSG_ext_title__ (firefox)",
  "minimum_chrome_version": "95",
  "icons": {
    "16": "img/logo/iconYellow.png",
    "128": "img/logo/logo.png"
  },
  "browser_action": {
    "default_icon": "img/logo/iconGrey.png"
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage",
    "tabs",
    "webNavigation",
    "*://apps.facebook.com/diggysadventure/*",
    "*://cdn.diggysadventure.com/*",
    "*://static.diggysadventure.com/*",
    "*://diggysadventure.com/*",
    "*://game.diggysadventure.com/*",
    "*://portal.pixelfederation.com/*",
    "*://web.facebook.com/*",
    "*://m.facebook.com/*",
    "*://mbasic.facebook.com/*",
    "*://www.facebook.com/*"
  ],
  "web_accessible_resources": [
    "inject/*.css",
    "inject/game0.js",
    "css/*.css",
    "js/*.js",
    "js/*.map",
    "img/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://portal.pixelfederation.com/*",
        "https://portal.pixelfederation.com/*/diggysadventure",
        "https://portal.pixelfederation.com/*/diggysadventure/",
        "https://portal.pixelfederation.com/*/diggysadventure/?*",
        "https://apps.facebook.com/diggysadventure",
        "https://apps.facebook.com/diggysadventure/",
        "https://apps.facebook.com/diggysadventure/?*"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "inject/game1.js"
      ]
    },
    {
      "matches": [
        "https://portal.pixelfederation.com/_da/miner",
        "https://portal.pixelfederation.com/_da/miner/*",
        "https://game.diggysadventure.com/miner",
        "https://game.diggysadventure.com/miner/*",
        "https://diggysadventure.com/miner",
        "https://diggysadventure.com/miner/*"
      ],
      "exclude_globs": [
        "*/wallpost.php*"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "world": "MAIN",
      "js": [
        "inject/game0.js"
      ]
    },
    {
      "matches": [
        "https://portal.pixelfederation.com/_da/miner",
        "https://portal.pixelfederation.com/_da/miner/*",
        "https://game.diggysadventure.com/miner",
        "https://game.diggysadventure.com/miner/*",
        "https://diggysadventure.com/miner",
        "https://diggysadventure.com/miner/*"
      ],
      "exclude_globs": [
        "*/wallpost.php*"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "js/purify.min.js",
        "js/Html.js",
        "inject/game2.js"
      ]
    }
  ],
  "background": {
    "page": "bgp/background.html",
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{858e32b2-8359-4209-ac48-7be2c56758fb}"
    }
  }
}