app/javascript/styles/customize/drop/linernotes-dark/mods/display_fadedinteractions.scss
/*
Fade out faved/boosted toots in notifications:
- for "x favourited your toot" / "x boosted your toot",
make the faved/boosted toot half-transparent.
author: trwnh
license: Public Domain
*/
.status.muted {opacity: 0.5}