Examine source code of ButtonBinder

{
  "manifest_version": 2,
  "name": "ButtonBinder",
  "version": "1.2.1",
  "description": "Bind buttons to keyboard shortcuts!",
  "content_scripts": [
    {
      "js": [
        "jquery.min.js",
        "submitter.js",
        "options.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "1521": "icons/myicon.png"
    },
    "default_title": "Whereami?"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "chrome_style": true
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{70b5c714-5c1a-4f94-81f4-f6bdbf0ef9e1}"
    }
  }
}