Especially ugly are the V106 printer and download icons.
The V105 and earlier icons are much nicer and more obvious are to their meaning, IMHO.
So, why were they changed after many years??? If it ain't broke, don't fix it.
The icons were updated to be more similar to the Firefox 89 "wireframe" design style used for other built-in buttons. (bug 1739965) Not everyone was a fan then, so I'm not surprised that people aren't thrilled with these, either.