Examine source code of Mouse Wheel Buttons

{
  "manifest_version": 3,
  "name": "Mouse Wheel Buttons",
  "description": "Adds floating bubbles to scroll smoothly up or down the page in place of the Scroll Wheel.",
  "version": "0.1.2",
  "author": "m-grohs",
  "homepage_url": "https://github.com/m-grohs/mouse-wheel-buttons",
  "icons": {
    "16": "img/mouse-wheel-button-16.png",
    "32": "img/mouse-wheel-button-32.png",
    "48": "img/mouse-wheel-button-48.png",
    "128": "img/mouse-wheel-button-128.png",
    "256": "img/mouse-wheel-button-256.png"
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "img/mouse-wheel-button-16.png",
      "32": "img/mouse-wheel-button-32.png",
      "48": "img/mouse-wheel-button-48.png",
      "128": "img/mouse-wheel-button-128.png",
      "256": "img/mouse-wheel-button-256.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mouse-wheel-buttons@m-grohs"
    }
  }
}