Examine source code of Auto-Scroll Screen Prompter

{
  "manifest_version" : 3 ,
  "name" : "Auto-Scroll Screen Prompter",
  "version" : "1.7",
  "description" : "Auto-scrolls any webpage for hands-free reading — just like a teleprompter.",
  "author": "thoughtlesslabs",
  "permissions" : [
    "activeTab" ,
    "scripting" ,
    "tabs" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "chrome-prompter@example.com",
      "strict_min_version": "109.0"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "action" : {
    "default_title" : "Auto-Scroll Screen Prompter",
    "default_icon" : {
      "16" : "icons/icon16.png",
      "32" : "icons/icon32.png",
      "48" : "icons/icon48.png",
      "128" : "icons/icon128.png"
    }
  },
  "icons" : {
    "16" : "icons/icon16.png",
    "32" : "icons/icon32.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "commands" : {
    "toggle-teleprompter": {
      "suggested_key": {
        "default": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      },
      "description" : "Toggle teleprompter scrolling"
    },
    "increase-speed": {
      "suggested_key": {
        "default": "Alt+Shift+Up",
        "mac": "Alt+Shift+Up"
      },
      "description" : "Increase scroll speed"
    },
    "decrease-speed": {
      "suggested_key": {
        "default": "Alt+Shift+Down",
        "mac": "Alt+Shift+Down"
      },
      "description" : "Decrease scroll speed"
    }
  }
}