I was told by the UAE Immigration that this just changed last month:

90‑day visit eligibility

If you are a passport holder of one of the below countries or territories, your passport will be stamped with a multiple entry 90‑day visit visa that's valid for 6 months from the date of issue, and for a stay of 90 days in total. Citizens of the below European countries are also entitled to apply for a pre‑arranged visit visa if their 90‑day visa on arrival has been fully utilized.

Albania Argentina Armenia Austria Australia Azerbaijan Bahamas Islands Barbados Belarus Belgium Bosnia Brazil Bulgaria Canada Chile China Colombia Costa Rica Croatia Cyprus Czech Republic Denmark El Salvador Estonia Fiji Finland France Georgia Germany Greece Honduras Hungary Iceland Israel Italy Japan Kiribati Kosovo Latvia Liechtenstein Lithuania Luxembourg Maldives Malta Montenegro Nauru Netherlands New Zealand Norway Paraguay Peru Poland Portugal Republic of Guyana Romania Russian Federation Saint Vincent and the Grenadines San Marino Serbia Seychelles Singapore Slovakia Slovenia Solomon Islands South Korea Spain Sweden Switzerland United Kingdom and Northern Ireland United States of America Uruguay