[polymeris]

That screenshot was taken from Firefox 53.0.3 on Linux/Cinnamon, if it helps.

Maybe SVG should support hinting...

[kapep]

Same for Firefox 54.0.1 on Windows 10.

The icons look blurry on most zoom levels. On zoom 90% the effect is reversed and the left icon looks ok but the others don't: https://imgur.com/a/AeREO