How to fix unplayable videos in Firefox

Watching videos online is one of the main forms of entertainment for people today. It’s a good way to relax, study, and even work. However, when using Mozilla Firefox, you may encounter an unexpected headache: it can’t play videos. This is very depressing, so Techquack has provided some solutions on this topic in this post.

Although you don’t know the full name, Mozilla Firefox, you should be very familiar with Firefox, one of the most popular web browsers around the world. Developed by the Mozilla Foundation and its subsidiary Mozilla Corporation, Firefox is an open-source Web browser. It displays Web pages based on the Gecko layout engine, making it comparable to the most popular browsers, such as Google Chrome, Internet Explorer and Microsoft Edge.

Videos play an important role in our daily lives; they present things more vividly than words. Users prefer to watch videos because it is more relaxing. However, more and more users are experiencing the same thing: they notice that Firefox sometimes does not play videos. Either way, it’s very frustrating.

But Techquack is here to give you the good news: videos that don’t play in Firefox are not a serious problem; there are some useful ways to solve the problem. You should try the following ways to play videos.


So why isn’t Firefox playing videos?

So why isn't Firefox playing videos?

It could be any number of reasons. It could be one of your browser plugins, accumulated cache data, or browser hardware acceleration.

Adding plugins, themes, add-ons, anti-virus toolbars, etc. to your browser can help. will improve your browsing experience. But on some sites, they often break the software. This prevents Firefox from accessing certain aspects of the Web site, such as videos.

Browser hardware acceleration allows Firefox to make the most of your computer’s hardware to perform graphics-intensive tasks such as video loading. But sometimes graphics processors and drivers can conflict with Firefox. This can cause problems when viewing videos on pages.


How do I fix videos that aren’t compatible with Firefox?

How do I fix videos that aren't compatible with Firefox?

Disable hardware acceleration

The first thing we can try is to disable hardware acceleration in settings. Although this feature is very useful, sometimes it can be a bit buggy, and disabling it can solve such problems. This solution requires restarting the browser. Therefore, it is recommended that you save all important tabs of work and bookmarks so that you do not lose important data.

  1. First, go to your Firefox options. To do this, click on the three bars in the upper right corner and select Options from the menu.
  2. Once you are in options, scroll down and you should see performance options.
  3. Uncheck “Use recommended settings” and then the “Disable/Activate hardware acceleration” option will appear. Also, disable this option.
  4. After that, restart your browser.
Disable add-ons

Sometimes it’s your browser extensions that interfere with your websites and prevent them from working properly. You can try disabling extensions and see if it works.

  1. First, go to the add-ons section by clicking on the three bars in the upper right corner. Or simply press CTRL+Shift+A.
  2. Then in the menu that opens, go to the “Extensions” section.
  3. Here you should see a list of extensions installed in your browser. Click on the three dots next to each extension and click “Disable”.
  4. Check to see if the problem is fixed now. You can also restart your browser, although this is not necessary after disabling extensions.
Cleaning the cache and cookies

We can then try clearing your browser cache and cookies.

  1. To do this, go back to your options.
  2. Go to Privacy and Security in the options on the left.
  3. Scroll down and you’ll see cookies and site data. From there, click “Clear Data.”
  4. Check the “Cookies” and “Site Data” and “Cached Web Content” options and click “Delete”.
  5. Restart your browser.
Enable automatic playback from your browser

For the next solution, go to the site where your videos aren’t streaming. Go to YouTube.

  1. Then click on the “Learn More” button. A new menu will open.
  2. On the menu that opens, go to the Permissions tab.
  3. Here you will find a list of permissions for the Auto Play option, uncheck the Standard User checkbox.
  4. Then select the Allow Audio and Video button.
  5. Restart your browser.
Update your Firefox

If everything else fails, you can always restart your browser.

  1. In the three bars at the top right, click the Help button.
  2. Then click on the troubleshooting information.
  3. On the right side, you’ll see Update Firefox.
  4. Confirm your decision by clicking Update Firefox again.
Get your Firefox out of commission

Finally, you always have the option to downgrade your Firefox. Since most users have reported this problem after updating. Decommissioning should solve the problem until it is finally resolved in future updates.

Shutting down your computer

Another useful solution that worked for many users was to shut down the computer to fix the problem immediately. Firefox seems to contain temporary configurations that are not deleted before restarting the computer.

Every application uses a cache to store information and data from various Web sites. If this cache is corrupted, you will not be able to play videos. To turn off your computer, simply turn it off completely, unplug the power adapter, and wait a few minutes before plugging everything back in.

Activating Autorun

Firefox has a feature that allows you to limit video playback on a site. Basically, Firefox blocks all self-playing videos, as it usually does at startup. In the process of stopping auto-playing videos, the player is interrupted and stops playing the video. Here we go to the site where the video isn’t playing and activate autoplay.

  1. Go to the site with the problem.
  2. Now click on the green lock at the top and activate autorun there.
  3. Save your changes and reload the site to see if the problem is resolved. If it still doesn’t work, shut down your computer.
Changing Internet access

If none of the above solutions work, you can switch to a faster broadband Internet connection. Firefox has a known problem where due to poor Internet access, videos stall, and instead of playing with buffering, they don’t play at all.

If you don’t have faster Internet access, try connecting your system to mobile data via an access point. If the video is streaming over a different connection, upgrade your network to see if that solves the problem.


Frequently Asked Questions

Under Performance, uncheck Use recommended performance settings. Additional settings will appear. Uncheck Use hardware acceleration if it is available. Close Firefox completely and restart Firefox to see if the problem persists.

  1. Click on the menu button and select Options. Settings.
  2. Select Privacy and Security and go to Permissions. (Or enter Autoplay in the search box in the search settings).
  3. Find Autoplay and click the Settings button. This will open a list of autorun settings.

Update your web browser. Clear your cache and history files on your Android phone. Clear your YouTube app cache. Update your YouTube or Facebook app.

Click the New Fx menu button and select Options (Windows) or Preferences (Mac, Linux). Select the Advanced panel and the General tab. Uncheck Use hardware acceleration when available. Close Firefox completely and restart Firefox to see if the problem persists.