	Chrome	Firefox	Internet Explorer	Opera	Safari	Edge
Android	Yes	Yes	N/A	Untested	N/A	N/A
iOS	No	N/A	N/A	Untested	Yes	N/A
Mac OS X	Yes	Yes	N/A	Untested	Yes	N/A
Windows	Yes	Yes	Yes (9+)	Untested	Yes	Yes

* CSS3 transitions are not supported in IE8 and below.
** Janky z-index. See tooltip on right example.

Notes:

Most tests performed with Browserstack.
Components that perform action on hover may not work on touchscreens eg. dropdown with hover. Oddly tooltip does work. Bootstrap mentions this, “Sticky :hover/:focus on mobile.
Even though real hovering isn't possible on most touchscreens, most mobile browsers emulate hovering support and make :hover ‘sticky’. In other words, :hover styles start applying after tapping an element and only stop applying after the user taps some other element.”
Probably the main reason why the components fail in earlier versions of IE is because they use advanced CSS selectors which aren’t supported. It may be possible to patch this with the use of something like selectivizr. This may defeat the purpose of using these javascript free components but on the other hand it may be acceptable for older IE.
The components do not fail gracefully. In most cases some elements are visible but interaction will not have any effect. The carousel component won't show anything.
Some layout issues with tab when wrapping on smaller screen sizes.
Weird flash when carousel loops around to first slide.

Documentation regarding browser support needed #32

Description