Examine source code of Hashcrypt

{
  "manifest_version": 2,
  "name": "Hashcrypt",
  "description": "Local/offline/decentralized password manager.",
  "version": "1.3",
  "applications": {
    "gecko": {
      "strict_min_version": "54.0a1"
    }
  },
  "icons": {
    "16": "icons/hashcrypt-16.png",
    "32": "icons/hashcrypt-32.png",
    "48": "icons/hashcrypt-48.png"
  },
  "browser_action": {
    "default_icon": "icons/hashcrypt-32.png",
    "theme_icons": [
      {
        "light": "icons/hashcrypt-32-light.png",
        "dark": "icons/hashcrypt-32.png",
        "size": 32
      }
    ],
    "default_title": "Hashcrypt",
    "default_popup": "popup/index.html"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs"
  ]
}