未注入Chrome扩展简单脚本

我正在尝试编写一个最小的Chrome扩展的第一步,我不明白为什么它不执行我的clientScript.js。

{
    "name": "Sit back, relax and enjoy",
    "version": "0.1",
    "description": "Finds and clicks the +extra channel points button when it is available",
    "permissions": [ "activeTab" ],
    "content_scripts": [
        {
            "matches": [ "https://twitch.tv/*" ],
            "js": [ "contentScript.js" ],
            "run_at": "document_idle"
        }
    ],
    "manifest_version": 2
}

这是我想要在匹配的页面上执行的脚本 https://twitch.tv/*

let intervalTimer

function sibareaen() {
    const btn = document.querySelector('.tw-button.tw-button--success.tw-interactive')
    if (btn) {
        btn.click()
        console.log('At your service - clicked the button for you!')
    }
}

function toggleSibareaen(on) {
    switch (on) {
        case true:
            intervalTimer = setInterval(sibareaen, 750)
            break
        case false:
            clearInterval(intervalTimer)
            break
        default:
            clearInterval(intervalTimer)
    }
}
console.log('At your service - ready to click for you!')
toggleSibareaen(true)

两个文件都在同一文件夹中:

另外,我已经正确地“安装”了扩展:

控制台不显示与扩展相关的错误。