I'm on Firefox on Windows 10. It loads super fast for me.
I suggest a few things to help your problem.
I hear "slow" and the first thing my brain goes to is spyware....
Computers with Spyware/viruses tend to run slower, especially web browsers. Run antiviral/antispyware, reboot your computer.
If that doesn't fix the problem, look to see what other windows/tabs/websites are open at the same time. I have found through Experience that Facebook is really bad at slowing things down. It's apparently very easy to get a hold of corrupted data packages on Facebook while looking at videos etc as that will slow my browser down to a crawl - heck I've seen snails move faster. If you see the same correlation happening for you, make sure you are not logged into Facebook in another window/tab while on the forum. Sometimes to fix the problem Facebook started, I have to close down my browser and reopen it before surfing further.
Hope that helps.