How to Test if Firefox Enhanced Tracking Protection Is Blocking Your Webcam

It's important to understand this is an indirect, less common cause compared to a straightforward permission block — in the large majority of cases, a blocked camera is a simple permission issue rather than a tracking-protection interaction. But Strict mode is deliberately aggressive, and it can occasionally catch a legitimate script a video-calling site depends on if that script's behavior resembles known tracking or fingerprinting patterns closely enough.

Canvas fingerprinting protection specifically is worth knowing about: some websites use an HTML canvas element internally as part of how they process or display video frames, a legitimate technical technique unrelated to fingerprinting. Firefox's protection against canvas-based fingerprinting can't always distinguish this legitimate use from an actual tracking attempt, and blocking canvas reads can interfere with a video preview that relies on that technique.

Step 1: Click the shield icon

At the left of the address bar while on the specific site.

Step 2: Check whether it shows trackers or scripts currently blocked

On this specific page.

Step 3: Toggle "Enhanced Tracking Protection" off for this site

As a direct test.

Step 4: Reload the page

And check whether the camera now works. ↑ Test with the widget above.

Step 5: If this resolves it, add a permanent exception

For that specific trusted site rather than lowering your overall tracking protection level for every site you visit.

If toggling protection off makes no difference at all, that's actually useful information too — it rules this out cleanly, meaning the real cause is very likely a standard permission or hardware issue covered elsewhere in this section instead.

How do I reset the Windows Camera app itself?

Go to Settings → Apps → Installed apps, find Camera, open its three-dot menu, and choose Advanced options → Reset. This clears the built-in Camera app’s own cache and settings without uninstalling it, which can fix a stuck, frozen, or permanently black preview even when the underlying device and driver are both working correctly. It only resets that one app — not your camera driver, and not other applications that use the camera.

Could my antivirus be silently blocking my camera?

Many third-party security suites — Bitdefender, Kaspersky, Norton, and ESET among others — include their own webcam-protection feature that runs independently of Windows’ own privacy settings. That means Windows can show camera access as fully permitted while the antivirus software blocks it anyway, at a layer Windows has no visibility into. Check the antivirus program’s own settings, usually under a Privacy, Webcam Protection, or similarly named section, and confirm your browser or conferencing app is on its allow-list.

How do I re-enable my camera in Device Manager if it's disabled?

Right-click the Start button → Device Manager, expand Cameras or Imaging devices, and look for a greyed-out icon or a small down-arrow badge. Right-click that entry and choose Enable device. This is a different action from updating a driver — a disabled device won’t respond to any other fix until it’s explicitly re-enabled here first, so it’s worth checking before assuming the problem is a driver or a permission.

Is Windows' own camera privacy toggle blocking access, separately from anything else?

Windows keeps a system-level camera permission at Settings → Privacy & security → Camera, completely separate from Device Manager, the Camera app, and any antivirus software. This one screen has a master Camera access switch plus a per-app list beneath it — both need to be on. It’s worth checking directly, since a camera can show as fully enabled and working in Device Manager while this toggle silently blocks every app from reaching it.