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Preview of Blackboard Ultra Spook

Blackboard Ultra Spook by Fx

Each hour a skeleton might run across your screen (only in Blackboard Ultra).

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About this extension
Spooky skeleton appears RANDOMLY.

You can check the chance of it showing up and when it may show up by click on the icon.
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Permissions and data

Required permissions:

  • Access your data for sites in the blackboard.com domain

Data collection:

  • The developer says this extension doesn't require data collection.
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Add-on Links
Version
1.4
Size
365.18 KB
Last updated
13 days ago (Oct 26, 2026)
Version History
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