Examine source code of Twitch Ad Muter

{
  "manifest_version": 2,
  "name": "twitch-admute",
  "version": "1.1.1",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{82600e38-6527-4fdb-9ed6-668ab7b1eb7f}"
    }
  }
}