Mozilla Lightning Project 4.0 Beta 3 / 3.3.3

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Lightning brings the Sunbird calendar to the popular email client and the SeaMonkey internet application suite.
Lightning brings the Sunbird calendar to the popular email client and the SeaMonkey internet application suite.Since it's an extension, Lightning is tightly integrated with Thunderbird or SeaMonkey, allowing it to easily perform email-related calendaring tasks. The most important feature of Lightning is that you will be able to manage your daily events or plan new tasks directly within Thunderbird or SeaMonkey.
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