Nullgen AI BlockerHow to block Muse
How to block Muse on every device
Muse is Meta’s personal AI agent at muse.ai, with its own app, content hosts, and agent workers separate from Meta AI. Below: how to block Muse in the browser, on phones and tablets, on your home or school network, and on managed devices.
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Muse
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muse.aiBlocked4 hostnames in the Nullgen catalog
Every entry also covers its subdomains, so the Muse app and API are blocked too.
What Muse connects to
These are the hostnames Muse uses for its website, its apps, and its API. Each entry is matched as a suffix — blocking muse.ai also blocks every subdomain of it — so the Muse app cannot slip through on a hostname that is not listed. Shared hosts that other products need are deliberately left out.
| Hostname | Role |
|---|---|
| muse.ai | Main website |
| ecto1usercontent.com | App, API, or content host |
| meta-agents-apps.workers.dev | App, API, or content host |
| metaaiusercontent.com | App, API, or content host |
Block Muse in the browser
Free: the Nullgen browser extension
The free extension blocks Muse and every other tool in the catalog in Chrome, Edge, Firefox, and Safari. It works on the page itself — no DNS change, no policy — and updates as the catalog grows.
Managed browsers: block the sites by policy
On a school or company fleet, push the hostnames as a browser policy so Muse is blocked even when someone uninstalls extensions. These snippets use the official Chrome, Edge, and Firefox policy names and the same hosts listed above.
Chrome and Edge — URLBlocklist
{
"URLBlocklist": [
"ecto1usercontent.com",
"meta-agents-apps.workers.dev",
"metaaiusercontent.com",
"muse.ai"
]
}Firefox — policies.json
{
"policies": {
"WebsiteFilter": {
"Block": [
"*://ecto1usercontent.com/*",
"*://*.ecto1usercontent.com/*",
"*://meta-agents-apps.workers.dev/*",
"*://*.meta-agents-apps.workers.dev/*",
"*://metaaiusercontent.com/*",
"*://*.metaaiusercontent.com/*",
"*://muse.ai/*",
"*://*.muse.ai/*"
]
}
}
}Chrome and Edge treat a bare hostname as the host plus every subdomain. Firefox needs both the apex and the wildcard pattern.
Need every AI tool in one file, or a .reg or macOS profile?
Open the free policy generatorBlock the Muse app on phones and tablets
Nullgen mobile app
The Nullgen app blocks Muse and 100+ other AI apps and sites on the whole device with an on-device filter — the app, the website, and the API, on any network, with no DNS server to run. Included with Nullgen Pro.
Without Nullgen: Screen Time on iPhone and iPad
- 1Open Settings → Screen Time → Content & Privacy Restrictions and turn restrictions on. This covers Muse in Safari and in apps that use Apple’s web filter.
- 2Under Web Content, choose Limit Adult Websites — the setting that lets you deny muse.ai by name.
- 3Under Never Allow, add muse.ai. Safari and apps that use Apple’s web filter will refuse it.
- 4To keep the Muse app off the device entirely, delete it and set Installing Apps to Don’t Allow, or use Ask to Buy on a child’s Apple Account.
Without Nullgen: Family Link on Android
- 1Open Family Link, choose the child, then Controls → Content restrictions → Google Chrome — where Muse can be blocked by site.
- 2Choose Only allow approved sites, or add muse.ai under Blocked sites.
- 3Under Controls → App limits, block the Muse app, or require approval for new installs from Google Play.
Block Muse on your home or school network
A DNS blocker such as Pi-hole, AdGuard Home, NextDNS, or pfBlockerNG blocks Muse for every device on the network — laptops, phones, consoles, and the Muse app — without installing anything on them. Subscribe to the Muse file from the public blocklist, or paste the rules directly.
Subscribe to the Muse list
AdGuard Home, uBlock Origin, and Brave rules
||ecto1usercontent.com^
||meta-agents-apps.workers.dev^
||metaaiusercontent.com^
||muse.ai^DNS blocking cannot see inside a VPN or a phone on mobile data. For a block that follows the device, use the Nullgen apps or an MDM profile.
Block Muse on managed devices
Schools and companies can block Muse on every managed iPhone, iPad, laptop, and Chromebook from the MDM they already run — Intune, Jamf, Kandji, or Google Workspace — with per-person policies and an approval flow for legitimate use. Nullgen Pro provides the profiles and the dashboard; these guides walk through the setup.
Questions about blocking Muse
Does the free Nullgen extension block Muse?
Yes. The free extension blocks prompts on Muse and every other AI tool in the catalog in Chrome, Edge, Firefox, and Safari. It works on the page itself, so it needs no policy and no DNS change.
Will blocking Muse break other websites?
No. Every hostname on this page belongs to Muse alone. Shared websites that other products depend on are never on the list — which is also why AI features built into those products stay reachable.
Can someone get around a Muse block?
A browser-only block can be bypassed with another browser or the Muse app, and a network block can be bypassed with a VPN or a phone on mobile data. A block on the device itself — the Nullgen apps, Screen Time, or an MDM profile — follows the device wherever it goes.
Does this block the Muse app, not just the website?
A DNS or device-level block does. The app talks to the same hostnames listed above, and every entry covers its subdomains, so the app cannot slip through on a hostname that is not listed. A browser policy or extension only covers the browser.
What happens when Muse adds a new hostname?
The catalog is updated as vendors change, and the Nullgen apps, the extension, and the public blocklist all read from it, so a new hostname reaches every device without anyone editing a list by hand.
Block Muse today
Start with the free browser extension. Add Nullgen Pro when you need the Muse app blocked on phones, tablets, and desktops, with approvals for the people who really need it.