3.3.6

Two independent reports of the same ghost – rounded popup corners on systems where 3.3.1's square corners should long have applied. Root cause found in Firefox's own toolkit CSS.

Fixed

• Square popup corners now hold on Windows 11 with Mica enabled. Nova turns widget.windows.mica on by default (and widget.windows.mica.popups follows), which makes Firefox render context menus and panels natively – the rounded corners come from Windows itself clipping the popup window, one level below anything CSS can reach. That's why --panel-border-radius: 0 worked on some machines and silently did nothing on others. FoxOne now opts popups out of the Mica backdrop under @media (-moz-windows-mica-popups), dropping them back onto the CSS-drawn path where the square corners apply. The soft popup shadow Mica normally provides is restored via the toolkit tokens, so Mica and non-Mica systems look identical. Same scoping as the rest of the popup theming: dark mode, no dynamic theme active, date-time picker excluded.