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Preview of What!?

What!? by DantesArcade

Highlight any word, phrase or sentence and see what it means right on the page. Tap "Go deeper" for background and both sides of anything that's debated. Works on Firefox for Android and desktop.

Available on Firefox for Android™
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On your phone: long-press any text, tap "? Explain", and get a quick explanation — then tap "Go deeper" for more.On a computer: highlight text and click the "?" bubble. The explanation appears right on the page, using the surrounding text for context."Go deeper" adds background and, when a topic is debated, the main arguments on each side.
About this extension
Ever hit a word, phrase or claim you don't quite get? Highlight it, and What!? explains it right there on the page. No new tabs, no copying and pasting into a search engine.
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Permissions and data

Required permissions:

  • Access your data for all websites

Optional permissions:

  • Access your data for api.anthropic.com
  • Access your data for en.wikipedia.org
  • Access your data for api.dictionaryapi.dev

Required data collection, according to the developer:

  • Website content
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Add-on Links
Version
1.1.0
Size
29.02 KB
Last updated
4 days ago (Sep 28, 2026)
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