Examine source code of Web Browsing Journal

{
  "manifest_version": 2,
  "name": "Web Browsing Journal",
  "version": "1.0",
  "description": "Track and review what you read every day for self-learning.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8dc8b449-c996-43a7-a045-bba61a8e2595}"
    }
  }
}