Examine source code of MousePager

{
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "js/mousepager.js"
      ],
      "matches": [
        "<all_urls>",
        "file:///*/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Page navigation made easier with mouse",
  "icons": {
    "48": "res/mouse.png"
  },
  "manifest_version": 2,
  "name": "MousePager",
  "options_ui": {
    "open_in_tab": true,
    "page": "res/options.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "version": "1.0"
}