无法读取属性“ executeScript”

Question

这是新手，谢谢您的帮助。

当由popup.html-> popup.js调用时，此方法效果很好。但是，当我将manifest.json设置为通过content_scripts执行时，返回错误无法读取属性'executeScript'

manifest.json:
...
"content_scripts": [{
    "matches": ["https://www.google.com/*"],
    "js": ["jQuery Core 3.4.1.js", "content.js"],
    "run_at": "document_end"
  }],

  "permissions": [
    "activeTab"
  ]
...

    content.js:

    chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) 
    {
            if (request.action === "getSource") 
            {
                message.innerText = request.source;
            }
    });

    function onWindowLoad() {
    var message = document.querySelector('#message');

        chrome.tabs.executeScript(null, {
            file: "getPagesSource.js"
        },
            function () 
            {
                if (chrome.runtime.lastError) {
                    message.innerText = "There was an error injecting script : \n" + chrome.runtime.lastError.message;
                }
            });
        }

    window.onload = onWindowLoad;