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Epupp

Browser extension for live-tampering web pages with userscripts, powered by a Clojure REPL.

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Epupp preview

Epupp is a free, open-source browser extension that lets developers live-tamper with web pages through a Clojure REPL and/or persistent userscripts. It's for developers who want to interactively experiment with modifying page behavior instead of editing and reloading a userscript each time.

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Behind the summary, Matchbox keeps a richer profile of Epupp - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

  • Problem & pain-point mapping
  • Who we surface it to (audience fit)
  • What it's a strong alternative to
  • Trust & credibility signals

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