AnimalQuery

Tries to speedup browsing by disabling JS and CSS content animations

As of 2019-09-08. See the latest version.

This script may have side effects:

sometimes events attached to animation will not fire. I still work on this from time to time. One of workarounds is to set duration of the animation to very low value (0.001ms) - this have slight effect on performance - your benchmark scores may be bit lower.
you may see page jumps when (auto)scrolling. This is (I think) side effect of jQuery animation jumping to the end immediately.
dropdown fields selection may jump randomly (flicker)
marquee/carousel/slideshow-like animations may scroll very fast using lot of resources (commenting out delays/durations adjustment will help)
youtube cinema mode switching may not work (player width will stuck)
google login page may stuck on greyed password field
endomondo login page may stuck (white page, orange progress on top)
map on mygpsfiles.com cannot be resized
DuckDuckGo search results may flicker/jump on hover
olx.pl search results may stuck on spinner

Because of this, new js-only version is available now https://greasyfork.org/en/scripts/40529-animalqueryjs Issues may also been fixed in new Firefox releases (66 looks promising)