Firefox (57 and newer) will show a scrollbar when scrolling the tabs (either using the mouse or scroll buttons).
Google Chrome does not handle scrolling well for RTL elements. When creating for right-to-left languages, don't use scrolling tabs at this time.
Firefox will not display ellipsis to indicate longer texts.
If you need to support IE 11, add polyfills for Promise and Object.assign. For example when using polyfill.io, add to the HTML:
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,Object.assign" type="text/javascript"></script>