Web Browser and Other Tools for Photosensitive Users?

I have sensory processing disorder and some other sensory issues. I find flashing lights, certain types of animation, zooming, flashing menus, sheering, etc. can be very painful and disorienting.

I currently use Firefox because it has better animation-block and cookie handling than Safari, but it still has far, far, far too much flashing.

Does anyone know of a web broweser which won't hurt to use? and won't trigger migraines for some, trigger seizures for others, etc. depending on the type of photosensitivity?