Don't show Tab focus outlines or selected text
Other tab implementations I've seen hide tab focus outlines and don't allow selecting text.

This can be achieved by setting outline: none and user-select: none respectively.
Thanks for reporting this. We're in the process of finalizing our focus states and this will be updated accordingly, in the near future.
Also, to note, user-select: none; isn't guaranteed to prevent selection.
Unfortunately, we can't remove the outline on focus due to accessibility requirements and browsers haven't implemented the :focus-visible pseudo-selector to allow us to turn off the outline only for mouse interaction. We're looking into options (differing styles or the focus-visible polyfill).
For reference:
- https://developer.paciellogroup.com/blog/2018/03/focus-visible-and-backwards-compatibility/
- https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo
- https://caniuse.com/#feat=css-focus-visible