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Is Twitch Stream Video Not Working on Old Firefox? Try This Simple Fix for Instant Results

By: Author Alex Lim

Posted on

Categories Troubleshooting

“Will Enabling This Firefox Setting Restore Twitch Streams on Your Older Browser?

Many users on older versions of Firefox, especially on Windows 7 or Extended Support Release (ESR) builds, report that Twitch streams play audio but display no video—only a question mark appears. This issue is due to Twitch’s recent adoption of the CSS :has() selector, which isn’t supported in outdated Firefox versions. As a result, the video player’s width is rendered as zero, causing the video to disappear.

How to Fix Twitch Video Not Showing on Old Firefox

  1. Type about:config in the Firefox address bar and press Enter.
  2. Accept the warning to proceed.
  3. In the search bar, enter: 
    layout.css.has-selector.enabled
  4. Double-click the setting to set its value to true.
  5. Close and reopen your browser to apply the changes.

After enabling this feature, the Twitch audio slider may disappear. To adjust the volume, use Shift + Up/Down Arrow keys as a workaround. Enabling the :has() selector allows Twitch’s updated CSS to render the video player correctly, restoring video playback on older Firefox versions.