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VTT subtitles are shown double in latest Firefox

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  • Last reply by daniel60

daniel60
daniel60
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When I play a video in the latest Firefox (Windows or Mac) from the streaming service www.cineasterna.com the VTT-subtitle are shown double.

This issue did not occur in previous version of Firefox. The subtitles works fine and does not show double in other browsers (Chrome, Safari, Edge, IE).

Why is that?

When I play a video in the latest Firefox (Windows or Mac) from the streaming service www.cineasterna.com the VTT-subtitle are shown double. This issue did not occur in previous version of Firefox. The subtitles works fine and does not show double in other browsers (Chrome, Safari, Edge, IE). Why is that?
Attached screenshots

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Remove the Cookies" for websites that cause problems:

  • Options/Preferences -> Privacy & Security
    Cookies and Site Data -> Manage Data

"Clear the Cache":

  • Options/Preferences -> Privacy & Security
    Cookies and Site Data -> Clear Data -> Cached Web Content: Clear

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window
daniel60
daniel60 Question owner
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Thanks, but that did not solve my problem.