Vertical double bar not rendered in Firefox on Linux

Created by: prisae

Issue Summary

Vertical double bar (\lVert, \rVert) not rendered in Firefox on Linux.

Steps to Reproduce:

See Supporting information.

Technical details:

• MathJax Version: src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"
• Client OS: Ubuntu 20.04
• Browser: Firefox 90.0; Chrome 91.0 edit/clarification: Chrome works; Firefox does not work

Supporting information:

Example: https://emg3d.emsig.xyz/en/latest/api/emg3d.optimize.misfit.html https://emg3d.emsig.xyz/en/stable/api/emg3d.simulations.Simulation.html#emg3d.simulations.Simulation.misfit