Examine source code of Password Reveal

{
  "name": "Reveal Password",
  "version": "0.1.0",
  "manifest_version": 2,
  "default_locale": "en",
  "description": "__MSG_extension_description__",
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "password-reveal.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "images/icon32.png",
    "32": "images/icon32.png",
    "64": "images/icon.png",
    "128": "images/icon.png"
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ]
}