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HTML5 subtitle issue with Firefox browser update

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I am working on a video player on my web app. An issue only occurs in latest Firefox browser where html5 video subtitle stacks til all of the subtitle are pushed up the video.

I am working on a video player on my web app. An issue only occurs in latest Firefox browser where html5 video subtitle stacks til all of the subtitle are pushed up the video.
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Modified by tenshinadela

Chosen solution

Thanks. It looks like this bug was discovered during the beta of Firefox 67, but due to timing, was fixed only for Firefox 68 and later: Bug 1535005 - [webvtt] html5 video captions doesn't disappear after seeking back to a position with an other caption.

I checked in Firefox Developer Edition (version 68.0b6) and the problem does not occur there. So, I think we all just have to wait for Firefox 68.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 26.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0

More Information

jscher2000
  • Top 10 Contributor
8574 solutions 70112 answers

Hi tenshinadela, can you provide a link to a page/video demonstrating this problem?

Hi tenshinadela, can you provide a link to a page/video demonstrating this problem?
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Question owner

You can try the video here https://www.html5rocks.com/en/tutorials/track/basics/
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jscher2000
  • Top 10 Contributor
8574 solutions 70112 answers

tenshinadela said

You can try the video here https://www.html5rocks.com/en/tutorials/track/basics/

The first video? The titles work fine if I let it play through. If I click anywhere along the player progress bar while a subtitle is displayed, then there is a problem of the updated title not replacing the existing one. Is that what you see?

(I run Firefox 67.0.2 on Windows 10.)

''tenshinadela [[#answer-1230867|said]]'' <blockquote> You can try the video here https://www.html5rocks.com/en/tutorials/track/basics/ </blockquote> The first video? The titles work fine if I let it play through. If I click anywhere along the player progress bar while a subtitle is displayed, then there is a problem of the updated title not replacing the existing one. Is that what you see? (I run Firefox 67.0.2 on Windows 10.)
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Question owner

Yes, you are correct. Apologize for not posting a clear description for this issue.

Yes, you are correct. Apologize for not posting a clear description for this issue.
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cor-el
  • Top 10 Contributor
  • Moderator
17339 solutions 156760 answers

Just a side note: The System Details list shows you have a rather old Shockwave Flash 26.0 r0 plugin (current is 32.0.0.207 (32.0 r0; 2019/06/11))

Just a side note: The System Details list shows you have a rather old Shockwave Flash 26.0 r0 plugin (current is 32.0.0.207 (32.0 r0; 2019/06/11))
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jscher2000
  • Top 10 Contributor
8574 solutions 70112 answers

Chosen Solution

Thanks. It looks like this bug was discovered during the beta of Firefox 67, but due to timing, was fixed only for Firefox 68 and later: Bug 1535005 - [webvtt] html5 video captions doesn't disappear after seeking back to a position with an other caption.

I checked in Firefox Developer Edition (version 68.0b6) and the problem does not occur there. So, I think we all just have to wait for Firefox 68.

Thanks. It looks like this bug was discovered during the beta of Firefox 67, but due to timing, was fixed only for Firefox 68 and later: [https://bugzilla.mozilla.org/show_bug.cgi?id=1535005 Bug 1535005 - &#91;webvtt&#93; html5 video captions doesn't disappear after seeking back to a position with an other caption]. I checked in Firefox Developer Edition (version 68.0b6) and the problem does not occur there. So, I think we all just have to wait for Firefox 68.
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Question owner

That's great. Thank you I tested it on Firefox 68 and it worked fine.

That's great. Thank you I tested it on Firefox 68 and it worked fine.
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