As above- upload test shows about the same amount higher than Edge. This has been occurring for around 3 months since I upraded to fibre broadband. Before the upgrade FF as always faster on both down and upload speeds. Immediately afer the upgrade Edge ad FF were the same This was so for about 3-4 week after the uprade, then the FF speed fell. There have been several updates to FF and I have tried reinstalling FF and various other changes to settings all to no avail. I am using Windows 10 latest versions on two seperate laptops,one being a Toshiba ( Windows 10 Pro) the other an ASUS (Windows 10 Home). Both have this problem. I am using the Ookla Speedtest.net and the Talktalk speedest (also supplied by Ookla) and with the same results. The problem is the same with wifi as with ethernet. I am in the UK. I thought it might be the router, but why the difference between browsers and why after a few weeks and not immediately after the upgrade? Appreciate any sggestions, thank you in advance.