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Add extra features and styles to make SeaMonkey your own.

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Lightning Version History

73 versions

Be careful with old versions!

These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.

Version 5.4b4 4.7 MiB Works with SeaMonkey 2.49 - 2.49.*, Thunderbird 52.0 - 52.*

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Version 5.4b3 4.7 MiB Works with SeaMonkey 2.49 - 2.49.*, Thunderbird 52.0 - 52.*

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Version 5.4b2 4.7 MiB Works with SeaMonkey 2.49 - 2.49.*, Thunderbird 52.0 - 52.*

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Version 5.4b1 4.7 MiB Works with SeaMonkey 2.49 - 2.49.*, Thunderbird 52.0 - 52.*

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Version 5.3b2 4.8 MiB Works with SeaMonkey 2.48 - 2.48.*, Thunderbird 51.0 - 51.*

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Version 5.3b1 4.8 MiB Works with SeaMonkey 2.48 - 2.48.*, Thunderbird 51.0 - 51.*

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Version 5.2b1 4.6 MiB Works with SeaMonkey 2.47 - 2.47.*, Thunderbird 50.0 - 50.*

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Version 5.1b1 4.6 MiB Works with SeaMonkey 2.46 - 2.46.*, Thunderbird 49.0 - 49.*

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Version 5.0b1 1.6 MiB Works with SeaMonkey 2.45 - 2.45.*, Thunderbird 48.0 - 48.*

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Version 4.9b2 4.7 MiB Works with SeaMonkey 2.44 - 2.44.*, Thunderbird 47.0 - 47.*

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Version 4.9b1 4.7 MiB Works with SeaMonkey 2.44 - 2.44.*, Thunderbird 47.0 - 47.*

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Version 4.7b3 4.7 MiB Works with SeaMonkey 2.42 - 2.42.*, Thunderbird 45.0 - 45.*

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Version 4.7b1 4.7 MiB Works with SeaMonkey 2.42 - 2.42.*, Thunderbird 45.0 - 45.*

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Version 4.6b1 4.5 MiB Works with SeaMonkey 2.41 - 2.41.*, Thunderbird 44.0 - 44.*

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Version 4.5b1 4.5 MiB Works with SeaMonkey 2.40 - 2.40.*, Thunderbird 43.0 - 43.*

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Version 4.4b2 4.5 MiB Works with SeaMonkey 2.39 - 2.39.*, Thunderbird 42.0 - 42.*

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Version 4.4b1 4.5 MiB Works with SeaMonkey 2.39 - 2.39.*, Thunderbird 42.0 - 42.*

Download for Linux Download for Mac OS X Download for Windows

Version 4.3b2 4.9 MiB Works with SeaMonkey 2.38 - 2.38.*, Thunderbird 41.0 - 41.*

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Version 4.3b1 4.9 MiB Works with SeaMonkey 2.38 - 2.38.*, Thunderbird 41.0 - 41.*

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Version 4.2b1 6.4 MiB Works with SeaMonkey 2.37 - 2.37.*, Thunderbird 40.0 - 40.*

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Version 4.0b6 6.6 MiB Works with SeaMonkey 2.35 - 2.35.*, Thunderbird 38.0 - 38.*

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Version 4.0b3 4.6 MiB Works with SeaMonkey 2.35 - 2.35.*, Thunderbird 38.0 - 38.*

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Version 4.0b1 4.3 MiB Works with SeaMonkey 2.35 - 2.35.*, Thunderbird 38.0 - 38.*

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Version 3.9b1 4.0 MiB Works with SeaMonkey 2.34 - 2.34.*, Thunderbird 37.0 - 37.*

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Version 3.8b2 4.1 MiB Works with SeaMonkey 2.33 - 2.33.*, Thunderbird 36.0 - 36.*

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Version 3.8b1 4.5 MiB Works with SeaMonkey 2.33 - 2.33.*, Thunderbird 36.0 - 36.*

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Version 3.7b1 3.1 MiB Works with SeaMonkey 2.32 - 2.32.*, Thunderbird 35.0 - 35.*

NOTE: This version is en-US only, since Thunderbird did not have a beta build for Thunderbird 35.

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Version 3.6b3 4.4 MiB Works with SeaMonkey 2.31 - 2.31.*, Thunderbird 34.0 - 34.*

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Version 3.6b2 3.1 MiB Works with SeaMonkey 2.31 - 2.31.*, Thunderbird 34.0 - 34.*

Download for Linux

Version 3.6b1 3.1 MiB Works with SeaMonkey 2.31 - 2.31.*, Thunderbird 34.0 - 34.*

Download for Linux Download for Mac OS X Download for Windows