Hi, Coco.
I tried to do that, but it couldn’t be done like that so I search Google and find how to do it from the terminal but it still didn’t open because there was a lib package not install and after I installed that I’m back in Manager.
I found 2 threads, this one and this package libwebkit2gtk-4.0-37 was mentioned to be installed, in the forum that also show the same issue with the libwebkit package and that helped to solve the installation in Kubuntu.
Blessings
Christo