System requirements

• Mozilla Firefox 2.0+
• Mozilla Thunderbird 2.0+
• SeaMonkey 1.1+
• Nightingale
• Postbox 1.0+
• Komodo IDE / Komodo Edit 4.0+
• Instantbird
• BlueGriffon
• Any other application based on Mozilla 1.8.1+

No longer supported

• Firefox Mobile 0.7–4.0b3
• Flock 1.2–2.6

Discontinued

• Mozilla Prism 0.9+
• Songbird 0.2.5+
• Eudora OSE
• Spicebird 0.7+