Examine source code of Open Tab Reloader (OTR)

{
  "manifest_version": 2,
  "name": "Open Tab Reloader",
  "version": "1.3.2",
  "description": "Open Tab Reloader (OTR) is an open-source add-on project designed for running on the Firefox web browser, allowing users to reload tabs with specific time-intervals automatically.",
  "homepage_url": "https://github.com/kokhong1995/open-tab-reloader",
  "icons": {
    "48": "icons/open-tab-reloader-48.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/open-tab-reloader-32.png",
    "default_title": "Open Tab Reloader",
    "default_popup": "popup/main.html"
  },
  "background": {
    "scripts": [
      "popup/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "opentabreloader@heansolutions.com"
    }
  }
}