Examine source code of Passman

{
  "manifest_version": 2,
  "name": "Passman",
  "version": "1.0.0",
  "description": "All in one password Manager.",
  "icons": {
    "16": "favicon16.png",
    "32": "favicon32.png",
    "96": "favicon96.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "favicon32.png",
    "default_title": "Passman",
    "default_popup": "index.html"
  },
  "web_accessible_resources": [
    "./static/*"
  ]
}