Open source · Built on Firefox
Don't just read the web. Act on it.
A calm browser with everything in the sidebar, workspaces, the live web built in — and room for your AI agents to drive it.
Calm by design.
Reshaped Firefox, in the spirit of Zen — with the live web built in.
Everything in the sidebar
A see-through sidebar runs the full height of the window — tabs, workspaces, downloads and extensions. The page floats beside it.
Workspaces
Separate sets of tabs in one window. Pinned tabs are shared across all of them.
Compact mode
Slide the whole sidebar away. Nudge the left edge or start typing to bring it back.
Site actions
Book a table, see pricing, get in touch — the address bar lights up when a site has known actions.
Live web search
Actuent turns websites into structured data: opening hours, prices, events — right as you type.
uBlock Origin built in
Preinstalled, ad-free from the first tab. It's a normal add-on, remove it if you like.
Upload from clipboard
Copied an image? When a site asks for a file, upload it straight from your clipboard.
Pure Firefox inside
Built on the official Firefox release, so every Firefox extension keeps working.
Let your AI drive.
Claude Code, Codex, Cursor — anything that speaks MCP can open pages, read, click, type, scroll and take screenshots. You see its cursor glide across the page, name attached. Nothing connects without your permission.
claude mcp add act-browser -- node act-mcp.mjs
Get Act Browser
Version 0.4.0 · Free and open source.