From github: https://github.com/webcompat/web-bugs/issues/143001.

<!-- @browser: Firefox 131.0 -->
<!-- @ua_header: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0 -->
<!-- @reported_with: unknown -->
<!-- @public_url: https://github.com/webcompat/web-bugs/issues/143001 -->

URL: https://shaka-player-demo.appspot.com/demo/#audiolang=en-US;textlang=en-US;uilang=en-US;assetBase64=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;panel=ALL_CONTENT;panelData=LIVE;build=uncompiled

Browser / Version: Firefox 131.0
Operating System: Mac OS X 10.15
Tested Another Browser: Yes Safari

Problem type: Something else
Description: Rewind on Firefox PiP doesn`t work
Steps to Reproduce:
I’ve encountered an issue in Firefox’s Picture-in-Picture (PiP) mode, specifically when attempting to rewind a video. While other controls like play/pause work correctly, the rewind function doesn't work for live contents. This issue seems to occur only in PiP mode, as the video rewinds without any problems when using the standard player interface.

Steps to Reproduce:

1. Open Firefox and play https://shaka-player-demo.appspot.com/demo/#audiolang=en-US;textlang=en-US;uilang=en-US;assetBase64=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;panel=ALL_CONTENT;panelData=LIVE;build=uncompiled a live content.
2. Switch the video to PiP mode by clicking the PiP button.
3. Attempt to rewind the video using the rewind controls.
4. Observe that the rewind functionality is not working as expected .

Expected Result:
The video should rewind when using the rewind controls in PiP mode.

Actual Result:

The video does not perform the rewind correctly in PiP mode.
<details>
<summary>View the screenshot</summary>
<img alt="Screenshot" src="https://webcompat.com/uploads/2024/10/103238a8-983e-408b-9dae-9c435f7f3d04.gif">
</details>

<details>
<summary>Browser Configuration</summary>
<ul>
<li>None</li>
</ul>
</details>

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