Network activity Firefox 33 is suddenly very slow on Ubuntu 14.04

Background: I'm a software developer running Firefox on Ubuntu 14.04 33. I tried all the usual things to solve this problem, including:

-safe mode
-create a profile new and fresh
-Disabling proxy http in settings
-restart firefox and the computer
-can use Chrome without problems, keeping the speed problems General network/internet

Problem: I use Firefox as my default browser constantly. It was working fine yesterday during most of the day. However, when I came home at night and shot to the top of the computer, browsing the internet with Firefox was agonizing. I'm talking like 10-20 seconds to load pages that load almost instantly on Chrome on the same computer.

I note that, sometimes, a page loads almost instantly as it should, but then this page and further assets page loads will return to take a long time.

I realized that the problem was the DNS settings on my system. For some reason, my resolve.conf settings has not change when I joined my network home and contained two entries in server names that did not exist on the network. The third worked in resolve.conf name server. As soon as I removed the first two and left just the right name server, this problem has disappeared.

Tags: Firefox

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