> As soon as you require precision on all browsers, it becomes a nightmare. Don't do that then. Seriously, browsers aren't meant to provide bit-for-bit precis

> As soon as you require precision on all browsers, it becomes a nightmare. Don't do that then. Seriously, browsers aren't meant to provide bit-for-bit precision. Really, they can't: your page will be viewed on phones, on phablets, on tablets, on laptops, on desktops, on giant wall-screens; it will be viewed in colour, in black-and-white, in high-contrast palettes; it will be viewed with the same fonts you have installed, and without them and in monospace; it will be read aloud; it will be copy-pasted; it will be saved as plain text or as HTML. Just … don't do that. Resist the impulse to do everything one browser or two browsers will let you get away with; limit yourself to what works on all browsers.