In T414289, we switched to using mrow with href attributes. This is due to the rendering of anchor tags in Firefox (140.7.0esr and older).

Newer non-esr versions already have this bug fixed.
This bug is not present in Chromium- or WebKit-based browsers.

This task will have to wait for the next Firefox ESR version (Q3 2026).

This task has two subtasks:

• switch from mrow with href attributes to anchor tags
• remove the mrow support in ext.math.popus.js (Preview extension support)