For technical information, refer to Supported browsers in the Installation Guide.
On the Admin sidebar, go to Stores > Settings > Configuration.
In the panel on the left under General, choose Web.
Expand the Browser Capabilities Detection section and do the following:
To display instructions that explain how to configure the browser to allow cookies, set Redirect to CMS-page if Cookies are Disabled to
To display a banner above the header when Local Storage is disabled in the user’s browser, set Show Notice if Local Storage is Disabled to
When complete, click Save Config.