Examine source code of Awesome History Viewer

{
  "manifest_version": 2,
  "name": "Awesome History Viewer",
  "version": "1.1.7",
  "description": "Take control of your browser with Awesome History Viewer",
  "browser_specific_settings": {
    "gecko": {
      "id": "awesome-history-viewer-s9c279wa@firefox.extension",
      "strict_min_version": "101.0"
    }
  },
  "browser_action": {
    "default_title": "Open My Window",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "alarms",
    "downloads",
    "tabs",
    "notifications",
    "storage"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    "index.html",
    "assets/*"
  ]
}