Firefox Smart Window is free, with no paid plan attached. Merlin AI is freemium — a usable free tier with paid plans above it. Both are listed under Browser Extensions & Copilots, so this is a like-for-like comparison. Neither is ranked above the other — Flocci carries no sponsored placement.
Firefox Smart Window is free, with no paid plan attached and is listed for built-in Firefox AI assistant that answers questions about the page and open tabs and searches browsing history in natural language. Merlin AI is freemium — a usable free tier with paid plans above it and is listed for works on any website. Both sit in Browser Extensions & Copilots.
Firefox Smart Window is the cheaper starting point: it is free, with no paid plan attached, while Merlin AI is freemium — a usable free tier with paid plans above it. Pricing tiers here come from the catalog, not from a promotional page.
Choose Firefox Smart Window if you need built-in Firefox AI assistant that answers questions about the page and open tabs and searches browsing history in natural language; choose Merlin AI if you need works on any website. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.
| Firefox Smart Window | Merlin AI | |
|---|---|---|
| Pricing tier | Free | Free tier + paid plans |
| Free to start | Yes | Yes |
| Category | AI Chat & Assistants | AI Chat & Assistants |
| Type | Browser Extensions & Copilots | Browser Extensions & Copilots |
| Listed capabilities |
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| Tags | firefox smart window, free ai browser, firefox ai chat, mistral firefox, private ai browsing, browser with built-in ai | browser extension, chrome, summary, youtube, chat, free |
| Website | firefox.com | getmerlin.in |
| Full page | Firefox Smart Window details → | Merlin AI details → |
| Alternatives | Firefox Smart Window alternatives → | Merlin AI alternatives → |