v2 Bug - Analysis board broken in Firefox

Screenshot:
Firefox Quantum Extended Support Release, 60.6.1esr (64-bits), Firefox for OpenSUSE Leap.
Works fine in Google Chrome.

The dev's response will probably be to update to newer release. I had the same problem, updated to the newest version from mozilla repo for openSUSE Leap and it's displaying properly now.

But yeah, it's a pity that ESR release isn't supported, since there are people that can't or won't update from it.