Thunderbird Captive Portal detector is a Thunderbird extension specially designed to detect captive portals and help you easily connect to a restricted Internet connection, such as the ones from Airports.
Thunderbird Captive Portal detector is an open source add-on designed to work with Mozilla Thunderbird 3.1 and later.
This add-on does not require a browser restart.
How to Install in Thunderbird:
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".