Originally Posted by
Mblaster
At the moment I'd say your options are:
1. Try removing some add-ons from Firefox and see if that increases the speed
2. Move to Chrome - I have an almost identical system to you, and earlier was running Chrome with 20+ tabs, a few other applications, playing video, and noticed no slow downs. The only notable difference in spec is ... (see below)
3. Get an SSD for your system/applications drive - no idea if this will actually make a difference or not, but slow downs could potentially be caused by disk latency. I know my PC generally became much more responsive when I got an SSD a few years ago.