Plugin Laser Loader is very small (4,9 KiB) and fast. The plugin adds a little loading progress bar at the top of the page to indicate that the next page is loading. You could see a similar UI pattern on YouTube or Medium.
Demo:
https://codecanyon.net/item/laser-loader-stylish-progress-bar-preloader/26005913
https://www99.zippyshare.com/v/rBNonRGl/file.html
http://ul.to/a5h06h2l
https://www.mirrored.to/files/S4BKLFZK/laserloader-110.rar_links
https://mirrorace.org/m/13gps
https://krakenfiles.com/view/S9Awt7htnz/file.html
https://hxfile.co/66kwts902ksd
https://www.fireload.com/83611d3a36fb3466/laserloader-110.rar
https://evoload.io/v/Ts2WofAB6Ld7x7
https://dropbay.net/1U15/laserloader-110.rar
https://drop.download/zq3oqv2rt8h2
https://ddownload.com/89xnj9j85k33/laserloader-110.rar
https://bayfiles.com/v2w5E0F9u4
https://anonfiles.com/38w2E3Fbu7
https://1fichier.com/?sj6chonj7sxflgbtlscn
This file has UNTOUCHED status - (original developer code without any tampering done)