Bugzilla

**Note**
* When the user logs into Hulu, plays a video, does NOT activate subtitles and then launches the PiP, he will notice that the PiP will display some CSS code as subtitles. 
* If then, he turns the subtitles on from the Hulu player, he will notice that the subs are correctly displayed. 
* Furthermore, if he then disables the subtitles again from the Hulu player, he will notice that both the CSS coding and the subtitles will continue to be displayed.
* This can be worked around by turning the subtitles OFF from the PiP subtitle controls.

**Found in**
* Nightly v113.0a1

**Affected versions**
* Nightly v113.0a1

**Tested platforms**
* Affected platforms: Ubuntu 22, Windows 10
* Unaffected platforms: 

**Steps to reproduce**
1. Log into Hulu
2. Play a video.
3. leave default subtitle settings (not enabled!)
4. Launch the PiP.

**Expected result**
* No subtitles are displayed in the PiP window.

**Actual result**
* Some CSS code is displayed as subtitles in the PiP.

**Regression range**
* appears to be a regression as it only occurs in Nightly.

**Additional notes**
* additional_note1

**Note**
* When the user logs into Hulu, plays a video, does NOT activate subtitles and then launches the PiP, he will notice that the PiP will display some CSS code as subtitles. 
* If then, he turns the subtitles on from the Hulu player, he will notice that the subs are correctly displayed. 
* Furthermore, if he then disables the subtitles again from the Hulu player, he will notice that both the CSS coding and the subtitles will continue to be displayed.
* This can be worked around by turning the subtitles OFF from the PiP subtitle controls.

**Found in**
* Nightly v113.0a1

**Affected versions**
* Nightly v113.0a1

**Tested platforms**
* Affected platforms: Ubuntu 22, Windows 10, MacOS 13
* Unaffected platforms: 

**Steps to reproduce**
1. Log into Hulu
2. Play a video.
3. leave default subtitle settings (not enabled!)
4. Launch the PiP.

**Expected result**
* No subtitles are displayed in the PiP window.

**Actual result**
* Some CSS code is displayed as subtitles in the PiP.

**Regression range**
* appears to be a regression as it only occurs in Nightly.

**Additional notes**
* additional_note1

**Note**
* When the user logs into Hulu, plays a video, does NOT activate subtitles and then launches the PiP, he will notice that the PiP will display some CSS code as subtitles. 
* If then, he turns the subtitles on from the Hulu player, he will notice that the subs are correctly displayed. 
* Furthermore, if he then disables the subtitles again from the Hulu player, he will notice that both the CSS coding and the subtitles will continue to be displayed.
* This can be worked around by turning the subtitles OFF from the PiP subtitle controls.

**Found in**
* Nightly v113.0a1

**Affected versions**
* Nightly v113.0a1

**Tested platforms**
* Affected platforms: Ubuntu 22, Windows 10, MacOS 13
* Unaffected platforms: 

**Steps to reproduce**
1. Log into Hulu
2. Play a video.
3. leave default subtitle settings (not enabled!)
4. Launch the PiP.

**Expected result**
* No subtitles are displayed in the PiP window.

**Actual result**
* Some CSS code is displayed as subtitles in the PiP.

**Regression range**
* appears to be a regression as it only occurs in Nightly.
* I've tried investigating the regression range and the best restuls I could determine are:
Tested mozilla-central build: 2023-03-14 (verdict: g)
Tested mozilla-central build: 2023-03-15 (verdict: b)
* All further builds would encounter a tab crash and I wasn't able to determine an exact regressor.

**Additional notes**
* additional_note1