First Byte for Chrome vs Firefox

My first time for Chrome is about 1.8 sec and firefox it is about .37 seconds
My website is https://pembrokeinstruments.com

Do you have links to test results? Make sure to do multiple runs in each browser as well. If you ran the Chrome test first and only did one run it is likely that the difference is just because the server was warmed up for your page (caches were primed, etc) so the 2nd test went much faster.