I confirm Firefox does not follow those links, which are correct and point to the right place. Chrome, IExplorer and Microsoft Edje work fine.
Turning OFF Content Blocking solved the Firefox issue for me.
My HTML knowledge goes no further than this, sorry :)
Is this an acceptable solution?
by accident I came across this
side. the links are working
Yeah. I've got the same ff and Ubuntu 18.04
If I shift-click, which opens a new window, then links work on that new window.
This looks like a FireFox-specific issue (since other browsers work).
I'll have to let somebody with actual web knowledge handle this.