The toolbar position should appear above the selected text (as usual)
The toolbar position is wrong. In this case it is centered.

OSX El Capitan v 10.11.2
Google Chrome Version 53.0.2785.143 (64-bit)
You can also reproduce this behaviour in your page https://www.froala.com/wysiwyg-editor/inline
But first remove the container div with the class text-center that forces the centered alignment.
or align the text to the left.

Why is this an enhancement?
According to the definition of bug :
A software bug is an error, flaw, failure or fault in a computer program or system that causes it to produce an incorrect or unexpected result, or to behave in unintended ways.
Source: https://en.wikipedia.org/wiki/Software_bug
This seems to bee a bug IMO since the toolbar appears in a completely wrong position, as a user I expect the toolbar to appear above or below the selected text (its a inline toolbar after all).
We consider it an enhancement because the browser returns the selection as being from side to side when using clientBoundingRect for the selection object: https://developer.mozilla.org/en/docs/Web/API/Element/getBoundingClientRect.
Unfortunately, this will remain as a wontfix. We are using getBoundingClientRect method (https://developer.mozilla.org/en/docs/Web/API/Element/getBoundingClientRect) which it appears is returning a wrong attribute. We'll investigate further what is causing that in browsers and report this to Chrome/Mozilla.
Most helpful comment
Why is this an enhancement?
According to the definition of bug :
Source: https://en.wikipedia.org/wiki/Software_bug
This seems to bee a bug IMO since the toolbar appears in a completely wrong position, as a user I expect the toolbar to appear above or below the selected text (its a inline toolbar after all).