That's weird, something is definitely wrong. Are they set up in a similar way? The first thing that comes to my mind is: Are you using the same DNS server on both? Differences in DNS response time should be more noticeable than rendering time on most hardware. And I think Firefox doesn't use the system DNS by default but I might be wrong.
Do you mind checking? I'm curious now.
Firefox feels so much slowwr than chrome when loading sites for me
That's weird, something is definitely wrong. Are they set up in a similar way? The first thing that comes to my mind is: Are you using the same DNS server on both? Differences in DNS response time should be more noticeable than rendering time on most hardware. And I think Firefox doesn't use the system DNS by default but I might be wrong. Do you mind checking? I'm curious now.