Examine source code of DiskPass

{
  "manifest_version": 2,
  "name": "DiskPass",
  "version": "2.1",
  "description": "Generate strong passwords with meaningful words.",
  "permissions": [
    "activeTab",
    "storage",
    "clipboardWrite",
    "clipboardRead"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAohuIXCHE9wvymgk0f4GkIQX/eG3A4V1mCO8fKu0+/8OlsxSzrUzCAXFGpBj0W6Y0WZFUKP+dJyYvyJkcKLcvF9Y2mq2E5DHocKGCoysEvK0lSe3lPBZCbhhoONlImYcG8OGuvCHO/PU5O+srxlq33MWMobJ5L8TRcOtfrUMW1Hwn1SkOK0WrI98zE5/Z6JVSBwaU18C22bjBP0i3nk7MQ42crJ3noXpz19NxUUrW5cPIeXETRtpBsRYOWD1gbXTtVYkq6hNm3jg5jaOgegDgtPQWK5fUbPWVm56oWatWjfteB8w4U0BxlArqiyL4VaM5PlQit2R7he5qxi2v3bY4FwIDAQAB",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "diskpass@perditum.com"
    }
  }
}