javascript - Chrome 扩展只运行一次

Question

我刚开始创建 Chrome 扩展程序，我想编写一个删除 Dota-Trade.com 网站上包含网络钓鱼链接的消息。

我得到了一切工作，除了脚本只在我按下时删除消息F5。如果我浏览该站点并单击“消息”，则什么也没有发生。我怎样才能改变这个？

清单.json

{
  "name": "Dota-Trade.com Fake Link Blocker",
  "version": "2",
  "manifest_version": 2,
  "description": "Deletes content which contain urls except official ones. By Trojan.",
  "content_scripts": [
    {
        "matches": [
        "http://dota-trade.com/messages"],
        "js": ["main.js"],
        "run_at": "document_end",
        "all_frames": true
    }
  ]
}

还有我的 main.js

function remove(){
  var div = document.getElementById("threads");
  var messages = div.getElementsByClassName("message te clear");

  for (var i=0; i < messages.length; i++) {
    rp = messages[i].getElementsByClassName("rp");

    messagetextobj = rp[0].getElementsByClassName("text");
    var messagetext = messagetextobj[0].textContent;

    if (messagetext.indexOf(".com/profiles") > -1 && messagetext.indexOf("steamcommunity.com") == -1) {
      div.removeChild(messages[i]);
    };
  }

  setTimeout(function(){remove();},500);
}

remove();