Online Callbook is an extension for Mozilla Firefox to find QSL information from the HAM radio web sites, such as QRZ.COM, ARRL.ORG, RAC.CA, QRZ.RU, BUCK.COM, and CQHAM.RU using shortcut buttons on the toolbar.
| License | Free |
|---|---|
| File Size | 10.39 kB |
| Version | 2.0 |
| Operating System | Windows 98 Windows 7 Windows Windows 2000 Windows XP Windows Vista Windows Me |
| System Requirements | Mozilla Firefox |