Examine source code of MOSADiscovery

{
  "version": "2.1.5",
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionNameShort__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "./assets/icon_16x16.png",
    "48": "./assets/icon_48x48.png",
    "128": "./assets/icon_128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*",
        "https://*.netflix.com/*"
      ],
      "css": [
        "/dist/contentScripts/yt.css"
      ],
      "js": [
        "/dist/contentScripts/yt.iife.js"
      ],
      "all_frames": true
    }
  ],
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{00c7281a-3df0-442a-877f-b9cafc8a3bd2}"
    }
  },
  "action": {
    "default_icon": {
      "16": "./assets/icon_16x16.png",
      "48": "./assets/icon_48x48.png",
      "128": "./assets/icon_128x128.png"
    },
    "default_popup": "/dist/popup/index.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "https://*.youtube.com/*",
    "https://*.netflix.com/*"
  ],
  "background": {
    "type": "module",
    "scripts": [
      "./dist/background/main.mjs"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/app/*",
        "/dist/app/index.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}