Examine source code of PersiPass

{
  "author": "3axap4eHko",
  "version": "5.1.1resigned1",
  "default_locale": "en",
  "manifest_version": 2,
  "name": "PersiPass",
  "short_name": "PersiPass",
  "description": "PersiPass offline sync password storage/generator.",
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_popup": "main.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Alt+Shift+P"
      }
    }
  },
  "icons": {
    "128": "icons/icon_128.png",
    "256": "icons/icon_256.png"
  },
  "web_accessible_resources": [
    "icons/icon_128.png"
  ],
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "idle"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ab70197e-5b3c-4001-b765-21404d4baab1}"
    }
  }
}