I would like to stop the image moving or block it once and for all. The animated image is shown here: https://www.pclinuxos.com/forum/index.php/topic,154209.msg1323298.html#msg1323298 It is in the poster's signature; it doesn't just move across the page once, it keeps moving across; now another user of that forum has added it to his signature also. I have these in about:config: image.animation_mode none ui.prefersReducedMotion 1 I have tried blocking the element with uBlock Origin and stopping javascript on the site. I can remove it using another add-on but that only works for that occasion. I don't want to install NoScript because it stops Facebook working.