Some important edits for 150% screen scale to reduce flickering:
@media (max-width: 700px) {
#widget-overflow-mainView {
height: 720px !important;
max-height: 720px !important;
}
#downloadsPanel {
max-width: 100vw !important;
}
#appMenu-popup {
height: 560px;
max-height: 560px;
margin-top: 6px !important;
}
#backForwardMenu {
height: 410px;
min-height: 200px;
margin-top: 15px !important;
width: 100vw !important;
}
#identity-popup {
height: 220px !important;
}
#protections-popup {
height: 575px !important;
max-height: 575px !important;
}
}
Tell me if you still have flickering with those changes I haven’t seen yet.
One important thing you should definitely do: put all your addon icons to the overflow menu (that icon that looks like this: »). It will also helps against addon flickering and save a lot of horizontal space.