Examine source code of Scrollyo

{
  "manifest_version": 2,
  "name": "Scrollyo",
  "version": "1.0",
  "description": "Save links to your scrollyo account quickly",
  "icons": {
    "48": "icon/icon-48.png",
    "96": "icon/icon-96.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "https://scrollyo.com/*"
  ],
  "page_action": {
    "default_icon": {
      "48": "icon/icon-48.png",
      "96": "icon/icon-96.png"
    },
    "default_title": "Scrollyo",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6bc7bbd-432d-41d4-9e61-9bf6cb94a8bf}"
    }
  }
}