Renewed with ISP and now am getting "up to" 600 Mbps download speed. I have a wired connection. I actually get over 700 on Opera, and about 550 on Chrome. With Firefox, I usually get about 280. I feel certain it is the browser - that is the only difference. Even wireless is fast. I have already tried different router ports, cables, disabling add-on's, etc. My version is up to date. I wonder if there is some setting I need to adjust to get the higher speeds. My preference is to stay with this browser, but not at the cost of speed. Appreciate any help!