1. Open Firefox and type about:config in the address bar.

Change each of these settings:

content.interrupt.parsing - true
content.max.tokenizing.time - 2250000
content.notify.interval - 750000
content.notify.ontimer - true
content.switch.threshold - 750000
nglayout.initialpaint.delay - 0
network.http.max-connections - 48
network.http.max-connections-per-server - 16
network.http.max-persistent-connections-per-proxy - 16
network.http.max-persistent-connections-per-server - 8
browser.cache.memory.capacity - 65536