Description:
Since 5.3b1 on OSX the UI text (in dialogs, toolbars, status bar etc.) is rendered differently, also with another narrower font (AFAICS).
I am not sure if that is a direct consequence of using HarfBuzz or of some other change.
But the UI is much less readable; it seems that with 5.2.x it was rendered in system font and had also much less smear in rendering the UI text.
I am attaching the screenshot of the same dialog (in 5.3b2 the same dialog is also rendered much bigger, but that might be another issue).

Steps to Reproduce:
1. Open LibreOffice
2. Open any dialog etc.
3.

Actual Results:  
Rendered text in 5.3.x UI is very narrow, smudged, less readable on OSX.

Expected Results:
UI as readable or better readable than in 5.2.x on OSX.


Reproducible: Always

User Profile Reset: No

Additional Info:
I am using experimental features and Slovenian (sl) language pack on OSX 10.12.1.


User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:50.0) Gecko/20100101 Firefox/50.0