Examine source code of Ebook Scroll

{
  "manifest_version": 2,
  "name": "Ebook Scroll",
  "description": "Add scroll zones to ebook-style pages. Click left/right or top/bottom areas to scroll by a configurable percentage of the viewport.",
  "version": "0.1.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ebook-scroll@easydev.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  },
  "browser_action": {
    "default_title": "Ebook Scroll",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}