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Preview of then apply them instantly

then apply them instantly by theme-creator

Create, preview, and apply custom Firefox themes. Save presets or export/import as JSON.

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About this extension
Personalize Firefox like never before. Quickly create and preview your own custom themes, then apply them instantly.
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Required permissions:

  • Download files and read and modify the browser’s download history
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Version
1.0.0
Size
14.96 KB
Last updated
8 months ago (Sep 3, 2025)
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