如何防止新打开的选项卡在旧选项卡中包含content.js

Question

我正在开发一个Chrome扩展程序，以便在另一个网页上播放或暂停网页的html5视频，并且需要将content.js注入新打开的标签页，我遇到的问题是新打开的标签页标签有两个content.js副本，一个来自创建时的注入，另一个来自旧选项卡，后者打开了新选项卡，这破坏了程序的逻辑，如果刷新新打开的页面，一切都会正常进行。这意味着刷新页面后，content.js的副本将消失。

这种行为完全破坏了我扩展程序的逻辑，我该如何阻止这种情况的发生？ manifest.json中是否有配置可以阻止旧页面将它的content.js传递给新打开的页面？

manifest.json

{
    "name": "Video Controler",
    "version": "1.0",
    "description": "Mute html5 video with shortkey.",
    "permissions": ["nativeMessaging", "debugger", "storage", "tabs", "http://*/*", "https://*/"],
    "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
    "background": {
        "scripts": ["background.js"],
        "persistent": true
    },
    "page_action": {
        "default_popup": "popup.html",
        "default_icon": {
            "16": "icon/icon16.png",
            "32": "icon/icon32.png",
            "48": "icon/icon48.png",
            "128": "icon/icon128.png"
        }
    },
    "content_scripts": [
        {
            "matches": ["<all_urls>"],
            "css": ["videoInfo.css"],
            "js": ["content.js"],
            "run_at": "document_start"
        }
    ],
    "commands": {
        "pause" : {
            "suggested_key": {
                "mac": "Command+Shift+Z"
            },
            "description": "Pause video"
        }
    },
    "manifest_version": 2
}