Examine source code of Browser History Logger

{
  "manifest_version": 2,
  "name": "Browser History Logger",
  "description": "Log each opened website to a user specified HTTP endpoint",
  "version": "1.0.2",
  "permissions": [
    "history",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": false,
    "default_title": "",
    "default_popup": "options.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": false,
    "chrome_style": false
  },
  "applications": {
    "gecko": {
      "id": "BrowserHistoryLogger@Programie",
      "strict_min_version": "100.0"
    }
  }
}