I use chrome - it has nothing to do with controlling the mouse's speed, per se.
My OS is still WinXP
When my computer first starts, even before I pop in my browser of choice, I can reset my mouse speed across all browsers, across all performances/websites by doing the following:
START / Control Panel / Mouse
Now, on the mouse controls, you find: button - pointer - pointer options - scrolling - hardware - sctivities
YOU want to select pointer options, and in that page, there is a 0-100 mouse speed adjuster (I use about 90%). Don't forget to hit the "apply" button below (and then OK) to lock in your choice.
Your equipment is preset from the factory and needs to be manually adjusted to your own suiting . Once done to your satisfaction, the settings remain until YOU change them again!
I hope this works on newer systems, because it has migrated from even the early days of Win95, all the way to my WinXP.
Good luck.