When I want to open some webpages, (usually pages with lots of flash content and java script codes) Firefox freezes for a few seconds and then after that I have the page I wanted with about 70% of it loaded. Also sometimes when want to open some pages in a new tab, Firefox goes in a few seconds of sleep. This also applies to some download links, when I click on them before IDM trigger them, I have a lag of about 5 seconds. I wanted to know what are the sources of this problem. The guess I've made is that the root of these problems are the extensions. But I'm wondering if there are some other ways to overcome these without disabling extensions. IDM version is the latest. This problem is checked both in Win7 x64 and x86.