Install the Browser Extension

The fastest way to get Zeuslock running. Install the extension, pair it with your organization, and confirm protection in under five minutes.

The fastest path to running Zeuslock

Installing the browser extension is the quickest way to put Zeuslock between your employees and any AI tool. Once installed and paired, every prompt typed into ChatGPT, Claude, Gemini, Copilot, Perplexity, Mistral, Poe, or You.com is inspected locally before it leaves the device. Most teams complete this in under five minutes per user.

Supported browsers

Zeuslock ships native extensions for the four browsers that cover virtually all enterprise endpoints:

  • Chrome — Chrome Web Store
  • Edge — Microsoft Edge Add-ons
  • Firefox — Firefox Add-ons (AMO)
  • Safari — Mac App Store (distributed as a Safari Web Extension)

All four builds share the same detection pipeline and the same policy contract, so an Anonymize rule defined in the Operator Console behaves identically across browsers.

Step-by-step: Chrome

  1. Open the Chrome Web Store listing for Zeuslock and click Add to Chrome, then confirm Add extension in the permissions dialog.
  2. Pin the extension. Click the puzzle-piece icon in the toolbar, find Zeuslock, and click the pin icon so the shield is always visible.
  3. Grant required permissions when prompted: read and modify data on AI provider sites (so prompts can be inspected) and access to active tab. Zeuslock never reads pages outside the AI tool allowlist.
  4. Click the toolbar icon to open the popup and choose Sign in.

Edge, Firefox, Safari

The flow is identical: install from the store, pin the toolbar icon, accept permissions. On Safari, you must also enable the extension from Safari → Settings → Extensions and allow it on the AI tool domains.

Pair with your organization

You have two options. Pick whichever your IT team has already configured.

  1. Organization token. An operator pulls a one-time token from the Operator Console at Settings → Devices → Add device. Paste it into the extension popup. The token is valid for 15 minutes and binds the install to your tenant.
  2. SSO. Click Sign in with SSO and authenticate against your identity provider — Okta, Azure AD, or Google Workspace. The extension receives a short-lived session token and provisions itself silently. If SCIM is enabled, the user's group memberships flow through automatically.

Confirm it is running

Once paired, the toolbar icon turns from grey to green. Hover over it and the tooltip should read Connected to: your-org-name, plus the active policy mode (Monitor, Anonymize, or Block). If you see Disconnected, click the icon and re-authenticate.

First test: a safe inline check

You should always verify protection works before trusting it. Use the documented Visa test card number 4111 1111 1111 1111 — this is a public test number reserved by the card networks and safe to paste anywhere. It will not charge or expose real data.

  1. Open ChatGPT in a new tab.
  2. Type a benign prompt followed by the test card, for example: Summarise this transaction: 4111 1111 1111 1111.
  3. Before you hit Enter, Zeuslock shows an inline preview at the bottom of the prompt box. The card is replaced by a format-preserving placeholder such as [CC_4242****4242], and the panel lists the finding type (credit_card) and the action taken.
  4. Send the prompt. ChatGPT receives only the anonymised version. The original never leaves your machine.

That round-trip — type, preview, anonymise, send — is the core Zeuslock loop. If you see it work once, it works for every detector.

Common gotchas

Corporate browser policies can block install. If your organisation manages Chrome via Google Workspace or Edge via Intune, the extension may need to be allowlisted by your admin. Send them the extension ID shown in the install page and ask for a managed install policy.

Safari needs explicit content-blocker permission

On macOS, Safari treats web extensions more conservatively than other browsers. After install, open Safari → Settings → Extensions → Zeuslock and tick Allow on All Websites (or at minimum on the AI tool domains). Without this, the icon stays grey and detections silently fail.

"My icon is grey"

Three causes, in order of likelihood: the extension is not signed in (click it and authenticate); your network blocks api.zeuslock.ai (check with your network team); or the current tab is not on a known AI tool domain (the icon is intentionally inactive on unrelated pages).

Where to go next

The browser extension covers web-based AI. For native desktop apps (Claude Desktop, ChatGPT for macOS, Copilot in Office), continue with Deploy the Desktop Agent. To understand what a real incident looks like in the Operator Console, read Your First Detection.