Examine source code of RSW Time Tracker

{
  "manifest_version": 2,
  "name": "Time Tracker",
  "version": "1.0",
  "description": "Track work and break time from your timesheet.",
  "browser_specific_settings": {
    "gecko": {
      "id": "time-tracker@rushabhsorathiya.com",
      "strict_min_version": "58.0"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://account.rainstreamweb.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "https://account.rainstreamweb.com/*"
  ]
}