How to fix slow youtube video / buffering problem on Verizon FIOS connections (Firefox only)

The browser is configured to load one web page or "request" a time.
You can alter these settings to increase the amount of information that can flow into Firefox's pipeline.

1.Type "about:config" into the address bar and hit return. Scroll down and look for the following entries:
"network.http.pipelining"
"network.http.proxy.pipelining"
"network.http.pipelining.maxrequests"

2. Alter the entries as follows:
Set "network.http.pipelining" to "true"
Set "network.http.proxy.pipelining" to "true"
Set "network.http.pipelining.maxrequests" to some number like 30. This means it will make 30 requests at once.

3. Finally, right-click the black space and select "New" and choose Integer.
Name it "nglayout.initialpaint.delay" and set its value to "0″.
This value is the amount of time the browser waits before it acts on information it receives

Now try that video!