It was a pain for me to piece it together from bits and pieces from the Firefox forums, I’m glad to share and help others avoid the same pain.

deleted by creator

I do that, here’s my userchrome:

:root{ --uc-toolbar-height: 32px; }

:root:not([uidensity="compact"]){--uc-toolbar-height: 38px}

#TabsToolbar{ visibility: collapse !important }

:root:not([inFullscreen]) #nav-bar{
  margin-top: calc(0px - var(--uc-toolbar-height));
}

#toolbar-menubar{
  min-height:unset !important;
  height:var(--uc-toolbar-height) !important;
  position: relative;
}

#main-menubar{
  -moz-box-flex: 1;
  background-color: var(--toolbar-bgcolor,--toolbar-non-lwt-bgcolor);
  background-clip: padding-box;
  border-right: 30px solid transparent;
  border-image: linear-gradient(to left, transparent, var(--toolbar-bgcolor,--toolbar-non-lwt-bgcolor) 30px) 20 / 30px
}

#toolbar-menubar:not([inactive]){ z-index: 2 }
#toolbar-menubar[inactive] > #menubar-items {
	opacity: 0;
	pointer-events: none;
	margin-left: var(--uc-window-drag-space-width,0px)
}
#nav-bar {
  margin-right: 90px;
}

deleted by creator

It’s a game that has nothing to do with workers, but real estate instead. If workers don’t go to the office, there will be no need for the company to rent an office the size it does, making it “lose” money. If they cut on their offices, real estate starts losing value (as we can see in some articles that start popping up), and that’s something that bothers a lot of big players.

Raises rent prices, overall cost of living and takes apartments from long term rental market.