Examine source code of Twetch Mute

{
  "manifest_version": 2,
  "name": "Twetch Mute",
  "version": "1.1",
  "description": "lets you mute/hide accounts on Twetch",
  "icons": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/muted.png",
    "default_title": "Twetch Mute",
    "default_popup": "mute_list.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://twetch.app/*"
      ],
      "js": [
        "jquery-3.5.1.min.js",
        "mute.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/*.png"
  ],
  "permissions": [
    "browsingData",
    "notifications",
    "storage"
  ]
}