Not sure which Product/Component buckets this should fall in… Steps to reproduce 0. with Firefox on Ubuntu 1. Go to https://github.com/github/linguist/tree/master/vendor 2. Look at the icons 1366x768 screen. The icons next to files/folders look blurry in Firefox, normal (crisp) in Chrome. https://webcompat.com/uploads/2018/10/a33d1457-eaac-40e6-b47c-a2f2507d9f84.jpg PS: This doesn't reproduce on Firefox Nightly macOS

The SVG happens to fall on a pixel boundary here, so its crisp pixel-positioned lines are actually falling between pixels and are blurred across them. You can hack around this locally by inspecting the icon, clicking up a few levels to its <table> container, and giving it "margin-top: 0.5px" (your mileage may vary -- might need a slightly different value depending on the precise positioning on your system). Anyway -- this is bug 608812.