Miro.com is an online collaborative whiteboard. When using the mouse, the scroll wheel is used by the site to zoom in/out of the whiteboard. As of Firefox 88, the speed at which zoom occurs on this website when using the mouse wheel is much faster than in previous releases of Firefox, causing the zoom steps to be much too large too fast. This has made it difficult to use this site. Note that I'm not talking about Firefox magnification zoom, but about how Firefox is passing mouse wheel information to the Miro.com website for use in their whiteboard zoom feature. Other users on the Miro community board are reporting they fixed this issue by reverting to Firefox 87: https://community.miro.com/ask-the-community-45/i-want-to-wheel-zoom-in-smaller-steps-how-3526?postid=18974#post18974