Examine source code of QuickLenny

{
  "manifest_version": 2,
  "name": "Lenny",
  "version": "1.0",
  "description": "Inserts lenny into a focused text field",
  "icons": {
    "48": "icons/lenny-48.png"
  },
  "browser_action": {
    "default_icon": "icons/lenny-48.png",
    "default_title": "Lenny"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}