[ X ] Allow only the following domains to choose their own fonts <-- is this possible?

[ehula]

I would like Zen to use the font I have specified in Settings/General/Language and Appearance/Fonts/Default Font on all web pages, with some exceptions.

In the Advanced setting of the above, there is the following setting:

[ ] Allow pages to choose their own fonts, instead of your selections above

What I would like to see instead (or in addition to) is:

[ ] Allow only the following domains to choose their own fonts, instead of your selections above

Does anyone know if this is possible in some way? I have tried using Stylus, but the way it applies fonts is different than this setting. This Zen setting handles font substitution much better.

If this is not possible, would this be something that could be implemented in a Zen Module?

[XanderLeaDaren]

Agreed: it would be nice to have either a blacklist or a whitelist of websites allowed to use their own fonts.

I love using Adwaita Sans, for example, but for some websites, button icons are stored in their own fonts and the website look & feel is broken.