Examine source code of Consumption icon

{
  "manifest_version": 2,
  "name": "Consumption icon",
  "version": "1.0",
  "description": "Consumption icons are commonly used in applications related to energy, food, finance, or user behavior tracking...",
  "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": "{2b2e6453-b9e1-4de7-ab21-b27f3550696d}"
    }
  }
}