Razer Taipan Functions

I've been trying to figure out how some of the mouse functions work for my Taipan. Specifically when I'm trying to customize buttons. I've been trying to get the "Scroll Left" and "Scroll Right" functions to work. I have tried assigning them to the buttons on the right side of the Taipan. I use the left side buttons default settings because I like how they function when browsing the web. One button for going back a page and the other for going forward a page.

What I'm trying to achieve with the buttons on the right side, since I hardly ever actually use those buttons anyways, is assigning them to the "Scroll Left" and "Scroll Right" functions. I assumed this is for "Horizontal Scrolling" Since I hardly ever have the need for horizontal scrolling it's not a big deal if I can't use the buttons for this. Though it would be nice.

I tried assigning a "Keyboard Function" of "Shift" to one of the buttons because in order to horizontal scroll in the web browser, Firefox, I normally have to hold down the "Shift" key and use the scroll wheel. I was trying to achieve the horizontal scroll function with the use of the right side buttons, one for scrolling left and the other for scrolling right.

Using the "Shift" "Scroll-Wheel" approach in Firefox scrolls the page left or right very slow. I even tried messing the Horizontal Scroll settings in Windows 10 settings.

I know this is a long post but searching via Google was basically just taking me to the "Master User Guide" for my Taipan and even that didn't explain what I wanted. So I figured I'd come here and try my luck.

Thanks!