我找不到任何说明或说明选项页面也是页面一部分的文档 
 
 
 
 注意：如果多个页面正在侦听onMessage事件，则只有第一个为特定事件调用sendResponse（）才能成功发送响应。 对该事件的所有其他响应将被忽略。 
 
 
 但正如文件中提到的那样 
 
 https://developer.chrome.com/extensions/messaging#connect 
 
 
 
 长期连接 
 
 
 有时，持续时间长于单个请求和响应的对话很有用。 在这种情况下，您可以分别使用runtime.connect或tabs.connect，从内容脚本打开一个长期频道到扩展页面，反之亦然。 该通道可以选择具有名称，以便区分不同类型的连接。 
 
 
 你应该使用connect你的用例 

I couldn't find any documentation which explains or documents that Option page is also part of the pages
 
 
 
Note: If multiple pages are listening for onMessage events, only the first to call sendResponse() for a particular event will succeed in sending the response. All other responses to that event will be ignored.
 
 
But as mentioned in the documentation
 
https://developer.chrome.com/extensions/messaging#connect
 
 
 
Long-lived connections
 
 
Sometimes it's useful to have a conversation that lasts longer than a single request and response. In this case, you can open a long-lived channel from your content script to an extension page , or vice versa, using runtime.connect or tabs.connect, respectively . The channel can optionally have a name, allowing you to distinguish between different types of connections.
 
 
You should be using connect for your use-case