CrOS 76.0.3809.102 does not support unprefixed mask-* properties
Pleroma v1.0.6 has this CSS declaration:
.nav-bar .logo .mask {
mask-repeat: no-repeat;
mask-position: center;
mask-size: contain;
/* ... */
}
Google Chrome 76.0.3809.102 does not support these properties (by default?) and only responds to the -webkit-
prefixed versions.
This results in a greyscale version of the logo being replicated across the top bar.