Examine source code of HireProgress Gmail Job Tracker

{
  "manifest_version": 3,
  "name": "HireProgress Gmail Job Tracker",
  "version": "0.1.0",
  "description": "Send the currently viewed Gmail message to HireProgress for tracking via Mailgun webhook.",
  "privacy_policy": "https://hireprogress.com/privacy",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://api.hireprogress.com/*",
    "https://mail.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "HireProgress Tracker",
    "default_icon": {
      "96": "icons/favicon.png"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "96": "icons/favicon.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/favicon.png"
      ],
      "matches": [
        "https://mail.google.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hireprogress@hireprogress.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "personalCommunications"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}