Examine source code of Crunchy-Sync

{
  "manifest_version": 3,
  "name": "Crunchy-Sync",
  "version": "1.3.0",
  "description": "Watch anime together on Crunchyroll in perfect sync",
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "webNavigation"
  ],
  "host_permissions": [
    "*://*.crunchyroll.com/*",
    "https://sync.sophey.vodka/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "dist/background.bundle.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.crunchyroll.com/*"
      ],
      "js": [
        "easterEggs.js",
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "pikaintro.mp4",
        "emote1.webp",
        "emote2.webp",
        "emote3.webp",
        "emote4.webp",
        "emote5.webp"
      ],
      "matches": [
        "*://*.crunchyroll.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "crunchysync@sophey.vodka",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}