Installing DNDShield on Firefox takes under a minute, straight from Mozilla's official add-ons store.
Step-by-step
- Open the DNDShield download page and choose Firefox, or go straight to the AMO listing.
- Click Add to Firefox, then confirm the permissions in the prompt.
- Pin DNDShield to your toolbar from the extensions (jigsaw-piece) menu.
- Click the icon and confirm protection is On (green).
What happens next
Ad, tracker, and popup blocking start immediately — no per-site setup, no account required. See what makes Firefox especially good for ad blocking if you're curious why.
If something looks wrong
Use Temporary Allow to test, then allowlist the site if it needs to stay off permanently.
FAQ
Which Firefox version do I need? Firefox 140 or newer.
Does it work on Firefox for Android? Yes — Firefox for Android is one of the only mobile browsers that supports extensions at all, and DNDShield runs there too.
Is it free on Firefox? Yes — core ad and tracker blocking is free; paid plans add extended streaming-platform handling and cloud features.
Common questions in the first few minutes
A few things worth knowing right after installing on Firefox specifically:
- Firefox shows a permissions warning during install. That's standard for any ad blocker — blocking requests on every site requires broad host permissions by design, not a red flag specific to DNDShield.
- A site looks broken after install. Try Temporary Allow before uninstalling — it's almost always one rule catching something it shouldn't, not the whole extension misbehaving.
- You updated Firefox and the icon disappeared from the toolbar. Firefox occasionally resets toolbar pins after a major update — re-pin it from the extensions (jigsaw-piece) menu, nothing about the extension itself changed.
Get started: Install DNDShield · Getting Started · Compare plans