Claude for Chrome
Browsentic starts the Claude Code you already have, signed in, on the tab you are looking at. It runs on your existing Claude plan, with no API key and no second subscription.
Chrome, Brave and Arc
Claude
for
Chrome,
Gemini
for
Chrome
and
Codex
for
Chrome,
in
one
side
panel
Browsentic adds a side panel to Chrome, Brave and Arc and runs it on the agent CLI already on your machine. It brings no model of its own and works in the tabs you are already signed in to.
Pick the agent
The agent CLIs it runs
The side panel lists each supported agent CLI it finds on your PATH. Switching takes one click; the panel and its tools stay the same.
Gemini for Chrome
Antigravity is Google’s agent CLI, running Gemini. Pick it in the side panel and Gemini works in your own Chrome profile, with your logins, instead of a clean profile it launched itself.
Codex for Chrome
OpenAI’s Codex CLI, on the ChatGPT plan you already have, with the same panel, tools and tab. Switch back to another agent at any time.
Mistral Vibe
betaMistral’s CLI. Beta: its session handling is still settling, so expect the odd retry on a long run.
Grok Build
betaxAI’s CLI. Beta, and the least proven: its rules were checked against the real CLI, but no full conversation in the panel has run on it yet.
Cursor CLI
betaCursor’s agent from the command line. Tested call by call against the real CLI, including approvals that outlast its one-minute limit on a tool call. Beta until it has carried a long conversation in the panel.
Qwen Code
betaAlibaba’s open source agent, on whichever model provider you point it at. Beta; configure that provider before its first run.
OpenCode
betaThe open source terminal agent, OpenCode 1 or 2, on any provider you sign it in to. Beta; its free Zen models do not run here, so sign in a provider of your own first.
What is specific to Chromium
Every tool, including the debugger ones
Nine tools are built on Chrome’s DevTools Protocol. Chrome, Brave, Arc and the other Chromium browsers have all of them.
The tools that need the debugger
The trusted click, both captcha tools, the four diagnostics tools and the two page-code tools all need Chrome’s debugger. Firefox has no equivalent, so its build lists fewer tools.
Chrome says when a debugger is attached
The "Browsentic is debugging this browser" bar shows for as long as one is held: about 250 ms for a trusted click, or until you stop a diagnostics recording. Attaching fails while DevTools is open on that tab, because Chrome allows one debugger per tab.
Chrome’s own side panel
Browsentic uses Chrome’s side panel, docked beside the tab. It stays open as the page navigates underneath it.
Brave and Arc use the same listing
One Manifest V3 build covers every Chromium browser, and Brave and Arc install from the Chrome Web Store listing Chrome uses: run setup, pick Brave or Arc, and it opens that listing there. Edge installs from the same listing, and has its own page here.
Install
Install for Chrome, Brave or Arc
One line installs Browsentic Bridge on your computer and opens the extension’s Chrome Web Store page. Add it, and the two pair by themselves.
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01
Run setup
It installs Browsentic Bridge, the program on your computer that starts your agent CLI, then asks which browser you use and opens the Chrome Web Store there.
shnpx browsentic@latest setup -
02
Add it from the Chrome Web Store
Press Add to Chrome on the page setup opened. Brave says Add to Brave, and Arc, Vivaldi and Opera use the same listing. It updates itself from then on. Pin Browsentic so the side panel is one click away.
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03
It pairs by itself
The extension finds Browsentic Bridge and connects, with no code, and the session key it gets survives restarts. If it asks for a code, enter the one setup printed; run browsentic pair for a new one.
shnpx browsentic pair
Available in the Chrome Web StoreOn a Mac or Windows, an app does the same from a window and brings its own Node: curl -fsSL https://browsentic.com/install.sh | sh on a Mac, irm https://browsentic.com/install.ps1 | iex in PowerShell.
Questions
Questions about Browsentic in Chrome
Is there a Claude extension for Chrome?
Anthropic ships one, Claude in Chrome, which runs Anthropic’s agent on a paid Claude plan. Browsentic instead runs whichever agent CLI you already have, Claude Code included, from Browsentic Bridge on your own machine, and is Apache 2.0 licensed. The full comparison has its own page.
Can I use Gemini in Chrome through this?
Yes, through Antigravity, Google’s agent CLI, which runs Gemini from your machine. Install it, log in once, and pick it in the Browsentic side panel. This is separate from Google’s own Gemini in Chrome feature, and the two do not interfere.
Does it work in Brave, Arc and other Chromium browsers?
Yes. Brave, Arc, Vivaldi, Opera and Edge install the extension from the Chrome Web Store, and Edge Add-ons carries the same build. Run setup, pick that browser, and it opens the listing there; the extension pairs by itself.
Is it on the Chrome Web Store?
Yes, and setup opens its page for you. It updates itself from the store, and the store copy and Browsentic Bridge work across versions, so either can update first. A browser that cannot reach the store, such as ungoogled Chromium or a managed profile that blocks it, can load it from a folder with npx browsentic@latest setup --unpacked.
Can it see the sites I am logged in to?
It acts in the tab you point it at, with the cookies and two-factor state that tab already has, so there is no throwaway profile and no signing in again. Nothing is read until you ask for something in that tab, and anything that reaches another person waits for your approval.
Give your browser a superpower.
Free and open source under Apache 2.0, with no API key, subscription or account. One line installs Browsentic Bridge and opens the extension’s store page. Nothing connects until you pair the two.