CSS Grid Layout shipped into Chrome, Firefox, Opera and Safari in March of this year. Microsoft Edge currently have an updated Version of Grid available behind a flag in Preview builds. At the time of writing, Can I Useindicates a global availability of CSS Grid Layout of 65.64%, rising to 70.75% if you include the prefixed version in IE10, 11 and current Edge. This is a rate of adoption we’ve never seen before for such a huge feature. It isn’t surprising that people don’t realise how many visitors will have support.