• Install · Sync · Trade
The Captain Companion extension for every browser.
Bring CaptainTrade.io into every tab. Download the package, load it in your browser, then sign in once on captaintrade.io — your session syncs into the extension automatically.
- Works in Chrome, Edge, Brave, Arc, Opera
- Firefox 121+ supported
- Paper trading by default
- Session synced from captaintrade.io
Supported browsers
The Companion
Everything CaptainTrade, one click away.
One-click toolbar access
Pinned popup, side panel, and floating action button across every tab.
Secure session bridge
Sign in once on captaintrade.io — the extension picks up your session automatically.
Quick trade actions
Send TradingView signals, manage webhooks, watch alerts without leaving the page.
Built for every level
Beginner onboarding, paper trading by default, live trading stays locked until ready.
Install in under a minute
Two builds. Same extension.
Chromium browsers load the unpacked zip. Firefox loads the XPI as a temporary add-on. Pick your build below.
Chrome, Edge, Brave, Arc, Opera
- 1Download captain-companion-chrome.zip and unzip it.
- 2Open chrome://extensions in your browser.
- 3Enable Developer mode (top-right toggle).
- 4Click Load unpacked and choose the unzipped folder.
Firefox 121+
- 1Download captain-companion-firefox.xpi.
- 2Open about:debugging#/runtime/this-firefox.
- 3Click Load Temporary Add-on.
- 4Select the .xpi file (or the extension's manifest.json).
After you install.
1. Open the popup
Click the Captain icon in your toolbar.
2. Sign in on captaintrade.io
Approve the auth handoff. The extension syncs your session in the background.
3. Trade from any tab
Side panel, FAB, and quick actions are ready across the web.
Ready when you are, captain.
Free to install. Beginner-safe by default. Live trading stays locked until you and your account are ready.