It is quite bad, but not that long ago the blur of css box-shadow was different between browsers, too. I wrote a little workaround that rendered a blurred recta

It is quite bad, but not that long ago the blur of css box-shadow was different between browsers, too. I wrote a little workaround that rendered a blurred rectangle on a canvas and then picked the alpha value at a certain point to calculate a correction factor. In that case, Chrome was the culprit, and since I had mentioned that we were working around the problem, the Chrome devs originally refused to fix the issue, but eventually they did the only right thing and fixed it. Lots of insights in the comments for this issue: https://bugs.chromium.org/p/chromium/issues/detail?id=179006 https://bugs.chromium.org/p/chromium/issues/detail?id=179006