Examine source code of Flip flops icon

{
  "manifest_version": 2,
  "name": "Flip flops icon",
  "version": "1.0",
  "description": "The symbol of flip flops, also known as flip flops, is a familiar and typical image of summer, the sea and comfort.",
  "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": "{b21144a0-e99f-4d2d-9974-63b5cf86f230}"
    }
  }
}