I have sensory processing issues, including a nasty sensitivity to flashing lights, zooming animations, parallax animations, and so on. Flashing lights can be blinding, disorienting, migraine-inducing, and in some cases, with safety lights, seizure-inducing. Flashing cursors don't take up much of the screen, but if I'm looking at the screen near the cursor, they're still a problem. I had set uicaretblinktime to 0 in about:config, to stop the blinking cursor. I reset it to the default, to try to see if Firefox would follow the system settings, which should also stop the blinking cursor. It wouldn't. I can't find uicaretblinktime in about:config any more, to set it to 0 again, to stop the blinking cursor again. How do I add uicaretblinktime again? Or add another fix to stop the blinking?