Suddenly, YouTube has no sound in Firefox and ruins your experience. This post provides the reasons for no sound on YouTube using Firefox and the effective ways with step-by-step instructions to get the sound back.
Many people like to use the Firefox browser due to its privacy-focused features and customizable options, especially when watching YouTube videos. However, Firefox YouTube has no sound suddenly, while you listen to the sound normally with any other browser or program. All right?
You’re not alone. I also encountered this situation, and I don’t want to miss the audio when I watch the YouTube video, so I summarize the solutions I have used. You can review the following common reasons and check if your browser has any of these issues.
Why Is There No Sound on YouTube Firefox
Knowing the issue’s reason is the first and most important stage of solving it. In this section, we will show you the common reasons behind no sound on YouTube using Firefox.
Audio Settings Issue
Incorrect audio settings can be caused by many situations, such as muting the YouTube video.
Cache and Data Issue
Corrupted cache or cookies can cause playback issues, including no sound for a video, as it disrupts the browser’s communication with YouTube’s servers. Just clear the browsing history, cache, and cookies, and then restart the browser.
Network Connection Issue
Network problems should be considered, too. An unstable and slow Internet might affect the data loading, resulting in YouTube no sound on Firefox.
Extension Issue
Sometimes, extensions, especially ad-blockers, will affect YouTube audio. You can disable these extensions one by one or all at once.
Above are the common reasons for Firefox YouTube sound not working. They are possibly your problems. Pick some of the fixes below according to your situation.
How to Fix Firefox No Sound YouTube
Now, you can review effective solutions to fix the issue of no sound on YouTube using Firefox.
#1. Unmute the YouTube Tab
The most common reason for no sound on YouTube using Firefox is that the sound of the YouTube video is muted unintentionally. Unmuting the YouTube tab is a straightforward and evident way to resolve the issue. Open a YouTube video and click on Unmute above the video title to recover the YouTube video audio.

#2. Check the Firefox Volume
I find on Reddit that many users try to fix Firefox YouTube no sound by checking the Firefox volume. Then, recover it successfully. Follow these steps to resolve the problem.
Step 1. Go to Sound Settings
1. Open Windows Settings.
2. Select System > Sound.
Step 2. Check the Firefox Volume
1. Scroll down and select App volume and device preferences under Advanced sound options.
2. Locate Firefox and make sure the volume is not muted, and change the Output Device to Default.

These two fixes above can be used for the audio settings issue.
#3. Clear Broken Cacha and Data
The next solution for Firefox YouTube sound not working is to clear the cache and cookies on your browser. It is an effective and easy-to-understand solution that requires no expert skills.
Step 1: Go to Firefox Settings
Open your Firefox, click on More > Settings. Alternatively, you can open Firefox and directly press Ctrl + Shift + Delete.
Step 2: Clear Cache and Data
1. Choose Privacy & Security, go to Cookies and Site Data, and click Clear data.

2. Choose the range of time to delete the data, click Temporary cached files and pages, then click on Clear.

#4. Check the Network
The simplest way to check the network speed is to refresh the web page. If it doesn’t work on YouTube, test your connection with a speed checker. If stable, disable VPNs temporarily or switch to other VPNs.
#5. Disable Firefox Extensions
To save your time, we take the latter as an example to show the instructions.
Step 1. Go to Troubleshoot Mode
Open Firefox, click on More > Help > Troubleshoot Mode.
Step 2. Enable Troubleshoot Mode
1. In a small pop-up window, click on Restart to disable the extensions temporarily.
2. Reopen YouTube on Firefox and play a YouTube video, and check if you can hear the sound.

#6. Restart Firefox
As the simplest fix for temporary glitches that happen on Firefox, restarting Firefox is worth it for everyone who suffers from no sound on YouTube on Firefox. Just close your browser and reopen it. Then, go to YouTube to check if the video has audio again.
#7. Update Your Browser
The last method to fix no sound on YouTube using Firefox is to update your browser.
1. Update Mozilla Firefox by going to Firefox menu image > Help > About Firefox.
2. And the browser will be updated to the latest version automatically.
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Conclusion
All in all, no sound on YouTube using Firefox is caused by many common reasons. By unmuting the YouTube tab, checking the Firefox volume, clearing cookies, checking the network connection, disabling Firefox extensions, restarting Firefox, and updating the browser, users can resolve most issues.

