Lightning | |
Developer: | Mozilla Foundation / Mozilla Corporation |
Released: | 0.1 (March 2006) |
Programming Language: | C++, XUL, XBL, JavaScript |
Operating System: | Linux, Windows, macOS, others |
Language: | 50 languages |
Genre: | Personal information manager |
License: | MPL 2.0 |
Lightning is a project from the Mozilla Foundation originally designed as an extension ("add-on") that adds calendar and scheduling functionality to the Mozilla Thunderbird mail client and SeaMonkey internet suite. It superseded the previous Mozilla Sunbird and the older Mozilla Calendar extension.[1] With version 38 of Thunderbird, the Lightning add-on was integrated and preloaded by default;[2] since version 78 of Thunderbird (released 2020), Lightning is part of Thunderbird and no longer an add-on extension. Lightning is compatible with iCalendar calendars.
The Lightning project was announced on December 22, 2004 in an effort to integrate Mozilla Sunbird into Mozilla Thunderbird.[3] Sun Microsystems contributed significantly to the Lightning Project to provide users with an alternative free and open-source choice to Microsoft Office by combining OpenOffice.org and Thunderbird with the Lightning Extension.[4] In addition to general bug-fixing, Sun focused on calendar views, team/collaboration features and support for the Sun Java System Calendar Server.[5]
Version 0.9 was the last planned release for Thunderbird 2. A calendar was originally to be fully integrated into Thunderbird 3, but those plans were changed due to concerns with the product's maturity and level of support.[6] [7] Lightning 1.0b2 is compatible with Thunderbird 3.1, Lightning 1.0b5 is compatible with Thunderbird 5 and 6, and Lightning 1.0b7 is compatible with Thunderbird 7.[8] [9]
Lightning 1.0 was released to the public on November 7, 2011. It was released alongside Thunderbird 8.0. Following that, every Thunderbird release has been accompanied by a compatible Lightning point release. Lightning finally started shipping with Thunderbird with version 4.0, on Thunderbird 38.0.1 released in 2015.[10] With the 2020 release of Thunderbird 78, Lightning is now a permanent part of the program.[11]