math: Hard to see vector norm notation at normal zoom in Firefox?

[EricCousineau-TRI]

On Firefox 105.0 (Ubuntu 20.04), as of fbc1580: https://manipulation.csail.mit.edu/pick.html#diff_ik_w_constraints

At normal zoom:

At 110% zoom, then it appears:

[RussTedrake]

Thanks for reporting that. That's frustrating. It shows ok in Firefox on my mac. I will look at it on Ubuntu soon.

I think my main recourse would be to see if upgrading MathJax helps.