we are seeing some performance issues on Firefox specifically, mostly on transforms from my testing. I am far from an expert in GSAP but I recall reading that using force3D: true will offload even 2D transformations to the GPU for the full animation? I'm wondering if there was a toggle for Force3D under the transform slider if that might help some of the transitions be a bit more smooth in firefox?
force3D - GSAP automatically attempts to maximize rendering performance by applying transforms with 3D components like translate3d() instead of translate() during The animation to activate GPU acceleration, and then switches back to the 2D variant at the end (if possible) to conserve GPU memory. That describes force3D:"auto" behavior (the default). Setting force3D: false disables the behavior. Setting force3D: true will force all transform-related tweens to use the 3D component and NOT switch back to 2D at the end of the tween.