Examine source code of Tabs History Export

{
  "name": "Tabs History Export",
  "version": "0.0.7",
  "description": "Exports the open tabs and their history to a json file",
  "manifest_version": 2,
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png"
  },
  "background": {
    "scripts": [
      "common_utils.js",
      "background_script.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "64": "icons/icon.png"
    },
    "default_title": "TabsHistoryExporter"
  },
  "options_ui": {
    "page": "options/index.html",
    "browser_style": true,
    "open_in_tab": true
  },
  "permissions": [
    "downloads",
    "notifications",
    "tabs",
    "storage",
    "unlimitedStorage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0da8535-88d8-4535-a9be-ed2f21490c04}"
    }
  }
}