Firefox ASS subtitles not displaying

[rechigo 364]

Firefox 143.0.3, Emby Server Beta 4.9.1.36 (Move this to testing area please, oopss)

 

When trying to enable ASS subtitles on a video, no subtitles display, and errors are visible in the developer console. Below photo contains a few log lines at the time of enabling ASS subtitles

 

Edited October 4, 2025 by rechigo

[Luke 42077]

 

Hi there, let's look at an example. Please attach the information requested in how to report a media playback issue. Thanks!

 

[rechigo 364]

Here are direct stream and server logs with debug logging enabled from the time I enabled the ASS subtitles. 

ffmpeg-directstream-f684c14f-b3f0-4e90-978f-d2fc2ed3adae_1.txt

embyserver.txt

Edited October 8, 2025 by rechigo

[Luke 42077]

OK we’ll take a look at it. Thanks.

[rechigo 364]

Same behavior can be observed in chrome. Sometimes skipping ahead/back is enough to get the subtitles to display as well

[Luke 42077]

Seems to be working just fine in my testing. Can you provide a sample video for testing?