Yes, I know the CTRL + Mouse Wheel things
Some of it may be settings, but if you look at them
side-by-side (and this page is about 1600 wide), some fonts look the same & then the next one is different.
1st - Chrome vs Firefox:
Greenguy looks the same
Ashley Madison looks smaller in Firefox
Real Sexy Amateurs looks the same except for the BOLD on the link in Firefox
2nd - IE vs Chrome:
All 3 look smaller in IE, so that might be a setting.
3rd - Firefox vs IE:
Again, all 3 look smaller in IE, so that again might be a setting. Also the same "except for the BOLD on the link in Firefox" difference.
But, my point on this is that I'm using the DEFAULT settings for each browser