Nullgen AI BlockerDesktop agents · Coming soon
Block AI apps on the whole computer, not just the browser
The Nullgen AI Blocker desktop agents will stop known AI apps and websites from loading anywhere on a Mac or Windows PC, including desktop AI apps the browser extension cannot see.
Coming to
macOS
Mac
Coming soon
Windows
Windows PCs
Coming soon
Extension and agent, together
Two layers on the same device providing maximum coverage.
- 01
The extension blocks the prompt
In Chrome, Edge, Firefox, and Safari, typing and pasting into AI prompts stops working while the rest of the site keeps working. This blocks prompts in all websites, even the ones you do not know about.
- 02
The agent blocks the destination
Outside the browser, and in any browser without the extension, known AI apps and sites will not load at all. This stops AI where the extension cannot reach.
How it will work
01
Install the agent
A small app for macOS or Windows that runs in the background.
02
Enroll it to your dashboard
Link the computer to a managed user, the same way the extension and the mobile app enroll.
03
Known AI apps stop loading
Desktop AI apps and AI websites fail to connect, with access requests routed to your approvers.
What it will block
The same list the mobile app uses, applied to the whole computer.
Desktop AI apps
ChatGPT for Mac and Windows, Claude, and other apps that talk to known AI destinations.
AI websites in any browser
Including browsers where the extension is not installed.
The same growing list
70+ AI destinations today, refreshed on its own.
Not every AI feature can be blocked at the domain level
AI built into products the computer needs for other work shares addresses with those products, so the agent will leave them alone.
- Copilot inside Windows, Office, and Edge
- Gemini inside Google Search and Workspace
- Firefly inside Creative Cloud
We are constantly expanding the list of AI tools we block. For those products, browser policies from Family Enforcement or Provisioning can disable built-in browser AI, and MDM can keep the apps themselves off managed computers.
What works on desktop today
You do not have to wait to cover Mac and Windows computers.
The browser extension
Free prompt blocking in Chrome, Edge, Firefox, and Safari on any Mac or Windows PC.
Family Enforcement
Pro families generate a Windows registry file or macOS profile that pins the extension and can switch off private browsing, guest mode, and built-in browser AI.
Zero-touch provisioning
Schools and organizations force-install the extension through Intune, Jamf, Google Workspace, or Group Policy.
Private by design
Like the mobile app, the desktop agents will decide what to block on the computer itself. Nothing you browse will be sent to Nullgen.
Common questions about the desktop agents
When do the desktop agents ship?
macOS and Windows agents are in development. Subscribe to the newsletter and we will let you know the moment they are available.
Will the agent replace the extension?
No. The extension keeps blocking the prompt inside the browser so the rest of a site stays usable. The agent adds coverage outside the browser.
Is it included with Pro?
Yes. Like the mobile app, the desktop agents will be part of every Nullgen Pro plan.
Will it see my traffic?
No. Blocking decisions will happen on the computer, and nothing you browse will be sent to Nullgen.
The rest of the suite
Every product links to the same dashboard, so policies and approvals follow the person, not the device.
- Free forever
Browser extension
Blocks typing and pasting into AI prompts on any website. Free forever, no account, everything on-device.
Chrome
Edge
Firefox
Safari
- Included in Pro
Mobile app
Stops known AI apps and websites from loading on the phone or tablet, in every browser and in the apps themselves.
- iOS
- AndroidSoon
Cover the browser today, the rest of the desktop soon
Install the free extension now and get notified when the macOS and Windows agents ship.