Deepin KWin and other Mods: Coverflow Alt-Tab, no Firefox titlebar, centering apps, gestures

For those who have installed Deepin-kwin, it's possible to have a Coverflow alt-tab option, as someone posted on the Deepin github. Here's how to do it:

Configure dde-kwin from the file ~/.config/kwinrc (since there's no GUI option to do that from settings yet). Type the following

[Effect-CoverSwitch]
TabBox=true
TabBoxAlternative=true
Reflection=true
[Plugins]
coverswitchEnabled=true

To get rid of the Firefox title bar when maximized, add to the same config file:
[Windows]
BorderlessMaximizedWindows=true

Enjoy!

To center opening apps, in the same kwinrc file above, in the [Windows] area paste:
Placement=Centered

For modifying gestures, reference this February post here on the forums: