Examine source code of Container Rules Manager

{
  "manifest_version": 2,
  "name": "Container Rules Manager",
  "description": "Manage Multi-Account Containers site-to-container assignments. Add, edit, and bulk-manage rules with import and export.",
  "version": "0.1.0",
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fmac-rules-manager@sarcasticbird.com",
      "strict_min_version": "91.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "Container Rules Manager"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "nativeMessaging",
    "management",
    "downloads",
    "storage"
  ]
}