Ublock has an interesting option: you can turn off external fonts with it: enter
no-remote-fonts: * true to My Rules and save it. I wanted to see how much it speeds up the browsing experience - quite a bit by the way. But somewhat surprisingly, this renders many pages unusable, like Forbes:
I don't even have a chance to guess the menu; maybe the dark blue is Facebbok, the light blue is Twitter, and the medium blue is LinkedIn, but I can't be sure. No tooltips - or at least link titles - either.
Others, since they have a text fallback, are just ugly, like Twitter:
This needn't be the case.
The unicode table1 is big, and it has an insane amount of characters, including the relatively new range of emojis. Therefore all the icons fonts could potentially have a relatively meaningful fallback character that would be shown in cases when the font does not load for various reasons.
The best example, which I wasn't aware of till a few weeks ago, is the thing everyone now knows at the menu button, the three, horizontal lines. It's called "Trigram for Heaven", U+2630, and looks like this: ☰. It's a simple unicode character, like a letter.
So let's take the above example of Twitter:
Home Notifications Messages
( U+F053, U+F054 nd U+F055 are in the "Private Use Area" )
it could be:
⌂ Home ⍾ Notifications ✉ Messages
- ⌂ U+2302 "House"
- ⍾ U+237E "Bell Symbol"
- ✉ U+2709 "Envelope"
🏠 Home 🔔 Notifications 📫 Messages
- 🏠 U+1F3E0 "House Building"
- 🔔 U+1F514 "Bell"
- 📫 U+1F4EB "Closed Mailbox with Raised Flag"
...if they decide to roam to emoji territory.
Art with fallback
Icon fonts had been called out lately, since SVG based graphis are often a better alternative; however, if the icons have a fallback, and you may not even need to load the icon font, that's a big win for accessibility.
I've decided to test test the idea above - using fontello.com2 - to create an icon font set where every icon is mapped to either something similar or something that can be used as an alternative:
It's very, very far from perfect, and some icons may be hard to guess on their own - in that cases, the context might help.
It's still better than unknown, foreign characters that might mean a thing in another language.
Footnote: the overwrite problem
Obviously this can lead to the situation where a carefully crafted icon gets replaced by a built-in emoji on certain systems, ruining the intended design.
This really is an issue, but there is a good side to it as well: it's like the native fonts - it fits. It looks like it was intended to be part of the system.