As already mentioned I'd also use the Home or Page Up keys.
The page in general is using old code.
I don't want to spam a link here, but if you fancy trying a different browser for general use, then Google `Web Browsers for Windows Grant' to find a few more to try, if you feel so inclined.
I personally use Edge, but test with Chrome, Opera, FF and IE, too.
(I'm just a hobbyist web guy with very limited design skills.)