Examine source code of MixUp

{
  "name": "MixUp",
  "version": "1.1.0",
  "description": "🤙 Unofficial Mixer.com tweaks & extensions",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "http://mixer.com/*",
        "https://mixer.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "http://mixer.com/*",
    "https://mixer.com/*"
  ],
  "icons": {
    "160": "mixup.png"
  }
}