I am using firefox since 2008, google services are lacking performance in firefox from last 2 years. First it was only youtube videos, but now it has expanded

I am using firefox since 2008, google services are lacking performance in firefox from last 2 years. First it was only youtube videos, but now it has expanded to docs and other services also. From last six months Gmail never opens on first attempt in my firefox second is required, but if I switch to chrome it not only magically opens at first attempt but with faster page load.