Examine source code of Scroll icon

{
  "manifest_version": 2,
  "name": "Scroll icon",
  "version": "1.0",
  "description": "The scroll icon can have many meanings depending on the context — like in user interface design, video games, or ancient culture.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Click me!"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{be1af60a-cdb2-49c2-84c5-91cd61d0194e}"
    }
  }
}