Mailchimp advise that the following internet browsers are all compatible with Mailchimp:
In my experience delivering Mailchimp training to many different organizations I have found that certain browsers work well with Mailchimp however some really aren’t suitable for use with Mailchimp.
I haven’t seen any issues when people use Google Chrome, Firefox or Opera. When using Apple Safari, Microsoft Edge or Internet Explorer I have seen all sorts of issues from Mailchimp buttons not displaying to the inability to upload images into the Mailchimp file manager.
I always recommend that people use either Chrome, Firefox or Opera when using Mailchimp as these are the best browsers to use for email marketing.