Disable rounded borders for Firefox tooltips?

[CapitaineToinon]

Hey there! New hyprland user here and loving it so far. I've been using a config with rounded borders and noticed that this would affect Firefox's tooltips to be rounded too, which isn't ideal.

Here is an example from a tooltip taken on https://adventofcode.com/2025/day/5

Notice how the tooltip is fine when rounding is at 0:

But how the tooltip's corners are truncated with rounding:

Is there any way to fix this?

[vaxerski]

Not atm. Firefox is weird and uses a subsurface there instead of a popup.

[Dregu]

But also hyprland is weird and rounds all subsurfaces, a lot of which are just used as building blocks of the main window.

[vaxerski]

we can't round a single corner so we have to

[CapitaineToinon]

I see, thanks for the fast answer! I'll just disable rounded borders for now. 👍