Examine source code of Prism icon

{
  "manifest_version": 2,
  "name": "Prism icon",
  "version": "1.0",
  "description": "The prism icon has a triangle with a beam of white light shining on it, then splitting into a rainbow of red and purple colors.",
  "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": "{6707c7ae-67b4-46dc-a57c-8dd1229311ef}"
    }
  }
}