Text is not rendered on Firefox

[NHodgesVFX]

Details

• Browser and browser version: Firefox 133.0.3 Snap Version
• OS version: Kubuntu 24.04
• xterm.js version: unkown, can reproduce the issue on https://xtermjs.org/

Steps to reproduce

1. Open https://xtermjs.org/
2. Look at the terminal window

Result: Text doesn't render or renders the same color as the background

If I run the chars command I can see colors but un-styled text is not displayed

Turning off WebGL fixes the issue. I also tried in the Brave browser on the same computer and the text is displayed correctly.

Computer Specs

Operating System: Kubuntu 24.04
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.8.0-52-generic (64-bit)
Graphics Platform: X11
Processors: 32 × AMD Ryzen 9 7950X 16-Core Processor
Memory: 30.5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2080 SUPER/PCIe/SSE2
Manufacturer: ASRock
Product Name: X670E Pro RS
NVidia Driver Version: 550.120