Border color gone in Firefox

Border color gone in Firefox

In my html views I include table, where I control the border color as follows:

#inhalt {
  border-collapse: collapse;
  border: 1px solid red;
  font: 12px arial;
}

This works fine in Chrome and until recently also in Firebox. But in the newest version of Firefox the setting only controls the outer border of tables. Is this a Zoho bug?

See attached picture.


Support has edit access to my app (bmpm).

Regards,
Filip