Created attachment 1170629 [details]
Screenshot of about:preferences page of Firefox 47.0-4.fc24

Description of problem:
  After upgraded to Fedora 24 from Fedora 23, the color of hint/tooltip text becames to white, the the background color is light yellow, which makes the text hard to recognize.

  See the attached screenshot.

Version-Release number of selected component (if applicable):
  47.0-4.fc24

How reproducible:
  Always

Steps to Reproduce:
  1. Run firefox 
  2. Open about:preferences page/dialog
  3. Move cursor to "Privacy" and wait for the hint/tooltip text popup

Actual results:
  White text with light blue background

Expected results:
  Follow the theme? Or change the color of text to black

Additional info:
  I'm using MATE desktop environment, using compiz (with emerald) or metacity window manager, this issue exists in both window manager.

  I upgraded two machines, they all have this issue.