Examine source code of Signal Vault

{
  "manifest_version": 3,
  "name": "Signal Vault",
  "description": "A streamlined companion for exploring movie and TV content from supported pages.",
  "version": "0.3.1",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Search with Signal Vault",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    },
    "default_popup": "extension/popup.html"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "Open Signal Vault"
    }
  },
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "type": "module"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; media-src 'self' https: http:"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "host_permissions": [
    "https://signal-vault.94.130.8.50.nip.io/*",
    "https://themoviedb.org/*",
    "https://*.themoviedb.org/*",
    "https://www.themoviedb.org/*",
    "https://imdb.com/*",
    "https://*.imdb.com/*",
    "https://www.imdb.com/*",
    "https://trakt.tv/*",
    "https://*.trakt.tv/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://themoviedb.org/*",
        "https://*.themoviedb.org/*",
        "https://www.themoviedb.org/*",
        "https://imdb.com/*",
        "https://*.imdb.com/*",
        "https://www.imdb.com/*",
        "https://trakt.tv/*",
        "https://*.trakt.tv/*"
      ],
      "js": [
        "assets/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "extension/options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "signal-vault@thsandorh.github.io",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "searchTerms"
        ]
      }
    }
  }
}