Examine source code of Slow Scroll Mode12

{
  "manifest_version": 2,
  "name": "Slow Scroll Mode",
  "version": "1.0",
  "description": "Toggle a slow-scroll mode to reduce scroll speed for careful reading.",
  "icons": {
    "48": "icons/icon48.svg",
    "128": "icons/icon128.svg"
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Slow Scroll Mode",
    "default_icon": {
      "48": "icons/icon48.svg"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d96cf838-d4d9-45b6-893b-293d4bfa4579}"
    }
  }
}