Examine source code of Ereaderify

{
  "manifest_version": 2,
  "name": "Ereaderify",
  "version": "0.6",
  "description": "Helps browsing on a ereader: click on right (resp. left) 5% of the page does a page down (resp. up), sets black text on white background, and makes text bold. Includes switcher to reader mode.",
  "icons": {
    "48": "icons/ereaderify-48.png",
    "96": "icons/ereaderify-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "Readability.js",
        "ereaderify.js"
      ],
      "css": [
        "ereaderify.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ereaderify@example.org"
    }
  }
}