{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.99.0",
  "author": "ClearCode Inc.",
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "accountsRead",
    "compose",
    "messagesRead",
    "storage"
  ],
  "icons": {
    "16": "/resources/icon.svg",
    "20": "/resources/icon.svg",
    "24": "/resources/icon.svg",
    "32": "/resources/icon.svg"
  },
  "background": {
    "page": "/background/background.html"
  },
  "message_display_action": {
    "default_icon": "/resources/icon.svg",
    "default_title": "__MSG_buttonsLabel__",
    "default_popup": "/ui/message-display-action/message-display-action.html"
  },
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "typical-reply@clear-code.com",
      "strict_min_version": "78.0"
    }
  }
}

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.99.0",
  "author": "ClearCode Inc.",
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "accountsRead",
    "compose",
    "messagesRead",
    "storage"
  ],
  "icons": {
    "16": "/resources/icon.svg",
    "20": "/resources/icon.svg",
    "24": "/resources/icon.svg",
    "32": "/resources/icon.svg",
    "64": "/resources/icon.svg"
  },
  "background": {
    "page": "/background/background.html"
  },
  "message_display_action": {
    "default_icon": "/resources/icon.svg",
    "default_title": "__MSG_buttonsLabel__",
    "default_popup": "/ui/message-display-action/message-display-action.html"
  },
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "typical-reply@clear-code.com",
      "strict_min_version": "78.0"
    }
  }
}

Set icon for more larger size
Set icon for more larger size
