How to Manage Microphone Permissions in Firefox

Firefox asks before any website can use your microphone, and it remembers your answer only when you tell it to. This guide shows how to grant or revoke access for a single site, review all saved microphone permissions, and check the operating-system settings that can block Firefox even when the site is allowed.

Before you start

• A working microphone that your operating system already recognizes as an input device.
• A reasonably current Firefox release. Labels and layout can differ slightly between versions, but the permission controls described here have been part of Firefox for several major releases.
• The page that needs the microphone must be loaded over a secure (HTTPS) connection. Firefox does not offer microphone access to insecure pages.
• If your computer is managed by an employer or school, an administrator policy may lock these settings. In that case some options may be greyed out or missing.

Permission handling happens locally in the browser: Firefox stores which sites you allowed or blocked in your profile. What a website does with the audio after you allow access depends on that site, not on Firefox, so check the site's own privacy information if recordings or uploads matter to you.

Step-by-step instructions

Allow the microphone when a site asks

• 1. Open the page and start the action that needs audio, such as joining a call or starting a test.
• 2. Firefox shows a permission prompt below the address bar. If you have more than one microphone, use the drop-down in the prompt to pick the input device you want.
• 3. Tick the option to remember this decision only if you want Firefox to keep the permission for future visits. Leave it unticked for one-time access.
• 4. Select Allow. To refuse, select Block.

Without the remember option, the permission is temporary and ends when you close the tab or the session ends. A temporary permission is the safer choice for sites you use rarely.

Change or reset the permission for the current site

• 1. On the site, click the permissions icon at the left end of the address bar (it appears next to the padlock once the site has requested a device).
• 2. Find the microphone entry. It shows whether access is allowed, allowed temporarily, or blocked.
• 3. Click the X next to the entry to clear it.
• 4. Reload the page. The site will ask again the next time it needs the microphone, and you can make a new choice.

Review all sites in browser settings

• 1. Open the Firefox menu and choose Settings.
• 2. Select Privacy & Security and scroll to the Permissions section.
• 3. Click the Settings button next to Microphone.
• 4. The list shows every site with a saved microphone decision. Change a site between Allow and Block, or select it and choose Remove Website. Remove All Websites clears the whole list.
• 5. Optionally tick the option to block new requests asking to access your microphone. Sites already on the list keep their saved status; all other sites are blocked without a prompt.
• 6. Click Save Changes.

Every change here is reversible: removing a site simply returns it to the ask-first state, and unticking the block-new-requests option restores normal prompts.

Check operating-system permissions

If Firefox itself is not allowed to use the microphone, site permissions have no effect. On macOS, open System Settings, go to Privacy & Security, select Microphone and make sure Firefox is switched on; restart Firefox after changing it. On Windows 10 and 11, open Settings, go to the privacy section, select Microphone, and confirm that microphone access is on and that desktop apps are allowed to use it. On Linux, permissions usually depend on your sound server and, for Flatpak or Snap installs, on the sandbox's own permission controls, so check the tool your distribution provides.

Check the output

• While a site is using the microphone, Firefox shows a microphone indicator in the tab and in the address bar. If you see no indicator, the site is not currently receiving audio.
• Use the site's own audio meter, or a microphone test page, and speak normally. A moving level bar confirms that sound is reaching the page.
• If the meter moves but the wrong source is heard, the site is using a different input device than you expected. Clear the permission and choose the correct device in the prompt, or pick it in the site's own audio settings if it has them.
• Input level, sample rate and microphone boost are controlled by the operating system and the device driver, not by Firefox's permission settings. Adjust them in your system sound settings if the volume is too low or distorted.
• Background noise handling depends on the website and your system. Some calling services apply their own noise suppression; Firefox permissions do not change this.

Common problems and next steps

No prompt appears: the site may already be blocked. Open the permissions icon in the address bar or the Microphone list in settings and remove the block. Also check whether you enabled blocking of new requests, and confirm the page uses HTTPS.

Access is allowed but the site hears nothing: confirm the operating-system permission for Firefox, then check that the microphone is not muted in system settings or by a hardware switch. Another application holding the device exclusively can also prevent Firefox from receiving audio; close other calling or recording apps and reload the page.

The wrong microphone is used: Firefox uses the device you chose in the prompt. Clear the site permission, reload, and pick the correct entry from the drop-down. If the prompt has no device list, the site may let you choose in its own settings, or you can change the default input device in your operating system.

Firefox keeps asking every time: you did not choose to remember the decision. Allow the site again with that option ticked, or add the site with Allow status in the Microphone settings list. In private windows, permissions are not intended to persist after the window is closed.

Settings are greyed out: an administrator policy is likely in control. Contact whoever manages the device, since local changes may be overridden.

Headphones or speakers silent instead of the microphone: that is an output device problem, which these permissions do not govern. Check the output selection in the site and in your system sound settings.