Sizzy 74
Sizzy 74 is the biggest release in a long time. Under the hood it jumps to Electron 43 / Chromium 150, so every site you preview now renders on the same modern engine as the latest Chrome. On top of that, Sizzy grows from a responsive-design browser into a real development companion: AI coding agents, an integrated terminal, full project management, and a brand-new vertical tab layout are all built in.
⚡Electron 43 & Chromium 150
Sizzy now runs on Electron 43 with Chromium 150 and Node 24. This was the release we spent the most time on, because it touches everything: your previews render on the newest web engine, you get the latest CSS and JavaScript features, faster performance, and all the recent security fixes. If you ever saw a modern site behave differently in Sizzy than in Chrome, that gap is now closed.
🤖AI coding agents, built into Sizzy
You can now run AI coding agents right inside Sizzy, scoped to each of your projects.
- Claude Code and Codex sessions live next to your previews, so you can ask an agent to make a change and watch it happen across every device at once.
- @mentions let you pull in the right context fast — reference MCP servers, notes, snippets, tasks, bookmarks, and open tabs directly in your prompt.
- An All Agents dialog lets you manage and jump between sessions across all your projects from one place.
- Pick thinking levels and switch between the latest agent models depending on how hard the task is.
⌨️Integrated terminal
Sizzy now ships with a real terminal built in. Spin up a terminal per project, run your dev server, and keep an eye on the output without ever leaving the app. It is powered by a proper PTY, so interactive CLIs, colors, and shortcuts all work the way you expect.
📁Project management overhaul
Your projects are now first-class citizens in Sizzy.
- Define dev commands and launch them straight from the project.
- Keep titled notes and todos attached to each project, with a proper markdown editor and drag-to-reorder.
- Browse your codebase with the built-in file tree and jump to files with fuzzy search.
- Set your preferred editor and open files directly in it.
- Save project info to a .sizzyrc file so your setup travels with the repo.
↕️Vertical workspace tabs
A brand-new vertical tab layout gives you a resizable rail for your workspace tabs, perfect for wide monitors. Pin your most-used tabs as favorites or global pins that follow you across projects, and switch between horizontal and vertical layouts from the interface settings.
📸Full-page screenshot overlay
Screenshots got magical. A new full-page screenshot overlay lets you capture multiple devices at once, and you can hand those screenshots straight to an AI agent through a mention — great for asking an agent to fix exactly what you are seeing on screen.
🧩Integrations & secure token storage
A new integrations settings area lets you connect external services and store your API tokens securely, so your agents and project tools can talk to the services you already use.
📡Activity monitor for live tabs
A new activity monitor gives you a live overview of your open tabs with quick previews and per-tab actions, so it is easy to see what is running and jump to the right device.
✨Polish, stability & fixes
On top of the headline features, Sizzy 74 includes a long list of smaller improvements: a smoother DevTools experience with universal inspect, better light-mode styling across dialogs and panels, more reliable scroll sync, cleaner process handling on quit, faster project switching that keeps tabs mounted, and many packaging and startup fixes for a more stable app overall.