User ports a Claude extension to Firefox and lets Fable generate a “Your Name” theme

CriM_91 · reddit · 2026-07-27

A user ports a Claude extension to Firefox and asks Fable for a “Your Name” theme

A Reddit user says they were inspired by another person’s Chrome extension work and wanted a Firefox port badly enough to make it themselves instead of waiting. They say they are not publishing it yet, but offered the code back to the original author so it could be merged and released for Firefox if desired.

After that, they asked Fable to add a “Your Name”–inspired theme without giving specific design directions. The model produced a theme called “kataware doki,” which the author says they loved.

The post is mostly a user anecdote, but it does show a real customization workflow: extension porting plus AI-assisted UI theming.

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