Looking for a free alternative to Firefox Smart Window? Here are 9 browser extensions & copilots worth trying — 9 with a free tier. Firefox Smart Window itself is free.
| Tool | Firefox Smart Window (you searched) | Opera Browser AI (Aria) | Page Assist | Gemini in Chrome |
|---|---|---|---|---|
| Pricing | free | free | free | free |
| Best for | Built-in Firefox AI assistant that answers questions about the page and open tabs and searches browsing history in natural language | Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed | Open-source (MIT) sidebar and ChatGPT-style web UI for local models via Ollama, LM Studio or Chrome's built-in Gemini Nano | Gemini side panel that answers questions about the current tab and across tabs |
| Visit | Open ↗ | Open ↗ | Open ↗ | Open ↗ |
Opera Browser AI (Aria) is the closest free alternative to Firefox Smart Window: same Browser Extensions & Copilots sub-category, and it is free. Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed
Yes — 9 of the 9 alternatives listed here are free or freemium: Opera Browser AI (Aria), Page Assist, Gemini in Chrome, Sider, Monica. None of them are paid-only.
Firefox Smart Window is free. There is no paid plan attached to it in the catalog.
They are the other tools in Browser Extensions & Copilots, then the rest of AI Chat & Assistants, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.
✦ WhyA Firefox Smart Window alternative — Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed.
✦ WhyA Firefox Smart Window alternative — Open-source (MIT) sidebar and ChatGPT-style web UI for local models via Ollama, LM Studio or Chrome's built-in Gemini Nano.
✦ WhyA Firefox Smart Window alternative — Gemini side panel that answers questions about the current tab and across tabs.
✦ WhyA Firefox Smart Window alternative — ChatGPT/Claude/Gemini in a browser sidebar.
✦ WhyA Firefox Smart Window alternative — All-in-one AI copilot for the browser.
✦ WhyA Firefox Smart Window alternative — Works on any website.
✦ WhyA Firefox Smart Window alternative — One-click rewrite, reply and summarize.
✦ WhyA Firefox Smart Window alternative — AI web automation and monitoring.
✦ WhyA Firefox Smart Window alternative — Built directly into the Brave browser sidebar — no separate site, no account, no signup required for free tier.