Customize Fonts should work
Posted: Mon Jul 27, 2015 7:06 pm
I set my font preferences for maximum legibility. Unlike Firefox, slimjet lets sites ignore my preferences. 
The font size settings may not work on all the websites.
It will depend on HTML coding of the website.
If a website has fixed font sizes according to web page structure, these font preferences may not work.
Chromium project in general does not over ride the font settings if already specified on a website. view this link - http://code.google.com/p/chromium/issue ... l?id=68972
I think if you can run an external extension like "Force Custom Font" it might work.