Default white background in gecko

Hi,

Am trying make the graphics layer transparent so that volume bar can appear on a side band video. But even after making all the pages transparent until shell.js am still seeing one white background screen which i think is set from gecko.
Is anybody aware from where is this default while screen set or how can i make it transparent?

Hello there,
Did you solved it?

That white screen usually comes from the Gecko compositor or the root document background, not from your app pages or shell.js. Even if all layers are set to transparent, Gecko will still paint a default background unless it’s explicitly overridden. You’ll need to look at the root document or browser background settings in Gecko and force it to transparent there, otherwise it will always render white.