Examine source code of SealSkin Isolation

{
  "manifest_version": 3,
  "name": "SealSkin Isolation",
  "version": "0.2.8",
  "description": "Open files and URLs in an isolated environment with E2E encryption.",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "contextMenus",
    "storage",
    "downloads"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sealskin-isolation@selkies-project.github.io",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "crypto-utils.js",
      "translations.js",
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "128": "icons/icon128.png"
  }
}