That's a valid reason for non-Apple browsers to prefer or even require raster (non-SVG) image files, such as a 16x16 favicon for a 96dpi display device like a typical office desktop or low-end laptop.
Whereas Safari only runs on macOS + iOS, which in-turn only runs on Apple hardware, and all Apple hardware today is going to run at ~140dpi or above - so pixel-perfect art just isn't required - and if someone plugs a (relatively) low-res TV into a Mac then the OS is going to downsample everything down anyway, and (most) users don't seem to care about that.
Whereas Safari only runs on macOS + iOS, which in-turn only runs on Apple hardware, and all Apple hardware today is going to run at ~140dpi or above - so pixel-perfect art just isn't required - and if someone plugs a (relatively) low-res TV into a Mac then the OS is going to downsample everything down anyway, and (most) users don't seem to care about that.