Anthony Enzor-DeMeo, Mozilla’s CEO, was quoted by The Next Web in June making the case for letting people pick their own AI model: “They all excel at different things. Why do I need to be forced into one of them?” I like that line. It’s also a fair summary of Firefox’s whole approach to AI in 2026, which is to offer plenty of choice and then hand you a very large off switch.
dassi isn’t among the choices. It doesn’t run in Firefox, only in Chrome, Edge and Brave, so most of what follows is about Firefox’s own AI.
A very large off switch
Firefox 148 shipped on February 24 with an AI controls panel, one toggle per feature and a master switch called Block AI enhancements that also stops the prompts for anything new. After the backlash that pushed Mozilla into promising the switch in the first place, you’d expect a stampede. By June, The Next Web reported, about 1% of users had flipped it and another 3% had turned off individual features. Maybe everyone else made peace with AI in their browser, or maybe they never went into Settings; the numbers don’t say which.
For everyone who left it alone, Firefox’s AI is mostly reading help. The sidebar chatbot is whichever of Claude, ChatGPT, Copilot, Gemini or Le Chat you prefer, and page translation runs on your own machine, offline if it must (the quietly best AI feature in any browser, to my mind).
Smart Window
Smart Window is where Mozilla is actually experimenting. It’s an opt-in desktop beta that answers questions from whichever tabs and history you choose to share, using one of three models or your own. Mistral Small 4 joined on September 16, the day the beta reached France (the US and Canada came first, and the UK and Germany are due later this year), and Enzor-DeMeo marked the occasion with “A browser shouldn’t be a one-way funnel.” Mozilla says conversations aren’t kept on its servers by default.
Mozilla’s Smart Window post also promises that it will help fill out online forms in the near future. I’ve read that sentence several times and still can’t tell whether it means cleverer autofill or something that clicks through a checkout on its own.
The clicking part
That second thing is what dassi does now, just not in Firefox. Registering the same parcel on three carrier sites every afternoon is the sort of errand I mean. You explain it to dassi once in plain English, or do it once while it watches, and it keeps that as a workflow you can rerun whenever you like, or on a schedule if the browser happens to be open at the time. I’d keep the final Submit as a flagged step that waits for a human, at least for the first week.
Logging in from another browser
The annoying bit is logins. dassi only knows the sessions of the browser it’s installed in, so a job living in Chrome, Edge or Brave needs you signed in to those sites over there, once. If you save the passwords to that browser’s password manager as you go, dassi can deal with expired sessions itself: when one runs out, dassi signs in with whatever the password manager autofills, so the password never passes through a chat or dassi’s settings. It stops at 2FA and lets you type the code.
When to choose Firefox
If the AI you want mostly reads and translates, and you’d like the option of none at all, stay. I wouldn’t switch browsers for anything on this page.
When to choose dassi
If some website chore keeps stealing your afternoons and a second browser seems a fair trade, try it on the free credits first. After that it’s $10 a month on your own key, or $25 to $300 on a plan with credits, with whatever model you like (a local one included), and the instructions and page content go to that provider, through dassi’s relay on included credits.
Whether Mozilla’s form help grows teeth is what I’ll be checking in six months.