Examine source code of Tasklist

{
  "manifest_version": 2,
  "name": "Tasklist - Manage your browsing tasks.",
  "description": "A sample extension showing the usage of developing a extension supporting both mv2 and mv3 manifest versions.",
  "homepage_url": "https://github.com/siddsarkar/tasklist-addon",
  "version": "0.0.2",
  "browser_action": {
    "default_icon": "assets/icon48.png",
    "default_popup": "pages/popup/index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "assets/icon48.png"
  }
}