Examine source code of Tab Chronology Map

{
  "manifest_version": 2,
  "name": "Tab Chronology Map",
  "description": "Visualize a timeline of when tabs were opened during your session",
  "version": "1.0",
  "icons": {
    "64": "64.png",
    "128": "128.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "64.png",
    "default_title": "Tab Chronology Map",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{717576c1-2bc7-4022-937f-30ff0d15911b}",
      "strict_min_version": "101.0"
    }
  }
}