New Tab page background transparent to go alongside MacOS window transparency.

[vitriolixir]

A feature which I believe many people may have wished for before is the ability for a new tab page (or for that matter any page) to be able to be consistent with transparent windows on MacOS. The PC equivalent is the mica effect which does work, just not for Mac. The closest I have managed is a position tracked copy of the background that moves as you move the window. But this was very slow and didn't reflect any windows that might be behind the current one.

A good demonstration of my aim is the demo at the bottom of this firefox theme project, GWFox: https://github.com/rakhalfps/gwfox-css. this shows the background of the new tab page refecting the transparency effect of the window. Now this exampleis on PC, but I know it is possible on mac, although FireFox does not allow it currently. 

Generally the new tab page is quite plain and could do with some modernising of styling as well so that could go alongside side my reccomendation as an update.

[Jon]

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