Examine source code of Youtube Chat Remover

{
  "manifest_version": 2,
  "name": "Youtube Chat Remover",
  "version": "1.0",
  "description": "Open Source Youtube Chat remover",
  "homepage_url": "https://github.com/cjgratacos/yt-chat-remover-ff-addon",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/48.png",
    "default_title": "Youtube Chat Remover",
    "default_popup": "src/popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*",
        "*://www.youtube.com/*"
      ],
      "js": [
        "src/app.js"
      ]
    }
  ]
}