There's a game where you start on any Wikipedia article and click links until you reach Philosophy. Most articles get there in five or six hops. The interesting part isn't the destination — it's the trail.
I built rabbitholes because I wanted that for my actual reading. Every longform article I open has a handful of terms I half-understand: a historical event I vaguely place, a concept from a field I don't work in, a name I've seen three times but never looked up. I kept skipping them. The result was a lot of reading that didn't quite stick.
The extension does one thing on highlight: a shadow-DOM tooltip renders an explanation from Claude Haiku 4.5 next to your cursor, without touching the host page's layout or styles. Click any word in that explanation to go one level deeper. Drag across a phrase to pivot sideways.
The part I use most: every answer ends with two suggested rabbit-hole topics — the most interesting threads from that explanation, one click away. And a counter in the corner tracks how many hops deep you've gone.
That counter turns out to be the point. I started at a New Yorker piece on Robert Moses, clicked into Robert Park's urban sociology, then the Chicago School, then Émile Durkheim's concept of anomie, then the Dreyfus Affair. Six hops. I had not planned to spend twenty minutes on the Dreyfus Affair. The trail was shareable afterward, which I did not expect to care about but do.
When an inline answer isn't enough, there's a globe icon that re-answers the query enriched with live Brave Search results, with source chips you can click through to the actual pages.
Zero telemetry, no intermediary server. Requests go directly from your browser to api.anthropic.com and api.search.brave.com. Your Anthropic API key lives in chrome.storage.sync, encrypted, and never leaves the browser.
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