Examine source code of Markify

{
  "manifest_version": 2,
  "name": "Markify",
  "version": "1.0",
  "developer": {
    "name": "Saumay Gupta"
  },
  "homepage_url": "https://github.com/saumayg/markify",
  "description": "Mark website as visited or to review.",
  "background": {
    "scripts": [
      "src/scripts/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/Check.svg",
    "default_title": "Markify",
    "default_popup": "src/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "markify@test.com"
    }
  },
  "permissions": [
    "notifications",
    "activeTab",
    "tabs",
    "storage",
    "unlimitedStorage"
  ]
}