What exactly is a "modern browser"? How "modern" is "modern"? Does that include modern text-based browsers, such as ELinks? I doubt it! What happens in a few years time, when "modern" browsers become able to do far fancier tricks (and what's now "modern" will be "older")? And who is recommending this, and why? And if you're about to answer that question, hold on to it for a bit; if we have to give an explanation beyond the text that appears, we might as well just call it "use this one".
It's explained in http://en.wikipedia.org/wiki/Texvc
Please read it first.
Thanks for the link, however, that simply says:
- "moderate" - should work and look good in reasonably modern browsers
How is "reasonably modern" any more explanatory than "modern"? Admittedly, I was being slightly over-the-top with the "who and why?", but I still think the label as it stands is complete non-information.
That's not to say, by the way, that the rendering principles and rules involved are in any way questionable - their existence is a highly creditable achievement. It's just the way they are then presented to the user as preferences that needs 'tightening up', so that full use can be made of the features.