它并没有默默地落在我身上，而是给了我：

  XML分析错误：文档元素
之后的垃圾位置：https：//www.google.gr/ 
行号2，列1 
 

这是因为它不是一个有效的XML文档（一个根元素nt只应该存在）。

我的方法使其工作如下：
$ b

测试.html ：（使之有效）

 < div> 
< style>< / style> 
< div id =test_element> 
< p>我的名字是牛< / p> 
< / div> 
< / div> 
 

test.js :(使用XMLSerializer）

  $（document）.ready（function（）{
 $ .get（chrome.extension.getURL（'/ html / test.html '），函数（data）{
 res = new XMLSerializer（）。serializeToString（data）; 
 $（document.body）.append（res）; 
}）; 
}）; 
 

Everything below works in a Chrome extension but silently fails when ported to Firefox on:

1. loading the test.html unless I remove <style></style> from it
2. appending the #test_element to the body

Do styles have to go into a separate file for Firefox extension? Why does append() fail?

test.js

$(document).ready(function() {
    $.get(chrome.extension.getURL('/html/test.html'), function(data) {
        // not called unless style element is removed from HTML
        // and never actually appended if it is removed
        $(document.body).append($.parseHTML(data));
    });
});

test.html

<style></style>
<div id="test_element">
    <p>my name is cow</p>
</div>

manifest.json

{
    "manifest_version": 2,
    "name": "Test",
    "version": "1.0",

    "icons": {
        "64": "icons/icon-64.png"
    },

    "permissions": [
        "tabs",
        "storage",
        "idle"
    ],

    "content_scripts": [
        {
            "matches": ["<all_urls>"],
            "js": ["lib/jquery.js", "src/test.js"]
        }
    ],

    "web_accessible_resources": [
        "html/test.html"
    ]
}

It is not falling silently to me but gives me:

  XML Parsing Error: junk after document element
  Location: https://www.google.gr/
  Line Number 2, Column 1

This is because it is not a valid XML document (one root element only should exists).

My way to make it work is the following:

test.html: (Make it valid)

  <div>
    <style></style>
    <div id="test_element">
        <p>my name is cow</p>
    </div>
  </div>

test.js: (Use XMLSerializer)

  $(document).ready(function() {
      $.get(chrome.extension.getURL('/html/test.html'), function(data) {
          res = new XMLSerializer().serializeToString(data);
          $(document.body).append(res);
      });
  });