Examine source code of Minivault

{
  "manifest_version": 2,
  "name": "Minivault",
  "description": "Encrypt secrets with password and share with those who know it.",
  "version": "1.7.0",
  "icons": {
    "16": "assets/16.png",
    "32": "assets/32.png",
    "48": "assets/48.png",
    "128": "assets/128.png"
  },
  "browser_action": {
    "default_popup": "vault.html"
  }
}