You can speed up your Firefox Web browsing experience by removing the default delay before the browser displays a page. It defaults to 0.25 seconds, but you’ll notice the difference when it’s been reduced to zero.
In the Firefox address bar type about:config and press enter. If prompted, “promise to be careful” at the warning screen.
Now, anywhere in the browser window, right-click and select “New”, followed by “String”.
Call the new string nglayout.initialpaint.delay and set its sting value to 0 milliseconds.
You can also increase the number of multiple connections to the server that is hosting the website you want to look at, to speed up your download time to render the page content.
You can tweak Firefox to increase the number of default connections from 4 to a higher number up to say 128.
Assuming you are still in the “about:config” browser page, find the entries network.http.pipelining and network.http.proxy.pipelining. Double-click both to change their false value to True.
Now double-click the entry network.http.pipelining.max.requests to a higher number, say 30, and click OK.
Close and re-open Firefox to start noticing the effects of your changes.