Examine source code of FediRedirect

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.5.0",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "fediredirect@manerakai.com",
      "strict_min_version": "67.0"
    }
  },
  "icons": {
    "16": "assets/logo-16.png",
    "32": "assets/logo-32.png",
    "48": "assets/logo-48.png",
    "128": "assets/logo-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "https://*/*"
  ],
  "browser_action": {
    "default_title": "__MSG_extensionName__",
    "browser_style": false,
    "default_popup": "pages/popup/popup.html",
    "default_icon": {
      "16": "assets/logo-16.png",
      "32": "assets/logo-32.png",
      "48": "assets/logo-48.png",
      "128": "assets/logo-128.png"
    }
  },
  "options_ui": {
    "page": "pages/settings/index.html",
    "browser_style": false,
    "open_in_tab": true
  },
  "default_locale": "en"
}