The past few years I've been saying "Safari is the new IE" in terms of web development. I can't tell you how many bugs I've had to fix because Safari was doing something weird with JS/CSS.
IE11 is going EOL "soon" and at that point Safari is really going to be the odd one out. Chromium and Firefox are at least _mostly_ consistent with each other, save for when Chromium adds some crazy new feature that's nonstandard (but at that point only niche websites are usually using the new feature).
IE11 is going EOL "soon" and at that point Safari is really going to be the odd one out. Chromium and Firefox are at least _mostly_ consistent with each other, save for when Chromium adds some crazy new feature that's nonstandard (but at that point only niche websites are usually using the new feature).