Mac Modern Browsers
-------------------

Chrome 52.0.2743.116 (Mac)
249 - serif
277 - sans-serif
599 - monospace
277 - cursive
226 - fantasy

Firefox 47.0 (Mac)
250 - serif
278 - sans-serif
600 - monospace
278 - cursive
227 - fantasy

Opera 39.0.2256.48 (Mac)
250 - serif
278 - sans-serif
600 - monospace
278 - cursive
227 - fantasy

Safari 9.1.2 (11601.7.7) (Mac)
250 - serif
278 - sans-serif
600 - monospace
278 - cursive
227 - fantasy



Windows Modern Browsers
-----------------------

Chrome Version 52.0.2743.116 m (Windows)
249 - serif
277 - sans-serif
549 - monospace
298 - cursive
176 - fantasy

Firefox 48.0.2 (Window)
250 - serif
278 - sans-serif
600 - monospace
299 - cursive
278 - fantasy

Opera 39.0 (Windows)
250 - serif
278 - sans-serif
549 - monospace
299 - cursive
177 - fantasy

Edge 25.10586.0.0
250 - serif
278 - sans-serif
600 - monospace
299 - cursive
174 - fantasy

Internet Explorer 11.494.10586.0
250 - serif
278 - sans-serif
600 - monospace
299 - cursive
174 - fantasy

Internet Explorer 11.0.9600.17843
250 - serif
278 - sans-serif
600 - monospace
207 - cursive
174 - fantasy



Old Versions
------------

Internet Explorer 10.0.9200.17457
333 - serif
278 - sans-serif
600 - monospace
207 - cursive
174 - fantasy

Internet Explorer 9.0.8112.16421
333 - serif
278 - sans-serif
600 - monospace
207 - cursive
174 - fantasy

Internet Explorer 8
250 - serif
278 - sans-serif
599 - monospace
299 - cursive
250 - fantasy
(took a timeout to see the width of a space-only div???)

Internet Explorer 7
250 - serif
278 - sans-serif
599 - monospace
299 - cursive
250 - fantasy
(took a timeout to see the width of a space-only div???)

Internet Explorer 6
250 - serif
278 - sans-serif
599 - monospace
299 - cursive
250 - fantasy
(took a timeout to see the width of a space-only div???)

Chromium 4.0.207.0 (25573) (Mac)
250 - serif
278 - sans-serif
599 - monospace
299 - cursive
176 - fantasy

Safari 5.1.7 (7534.57.2) (Windows)
250 - serif
278 - sans-serif
599 - monospace
299 - cursive
299 - fantasy