[Enhancement] kinetic scroll should be cumulative
I opened a similar issue for GTK (gtk#2239 (closed)). IIUC Epiphany doesn't use GtkScrolledWindow so opening a separate issue here.
When using a touchpad 2-finger scroll gesture to initiate a kinetic scroll in the Linux version of Firefox, it is possible to accelerate the scroll speed by initiating that gesture again while the window is still scrolling. With each successive gesture the scrolling speed doubles, more or less.
This is a pretty important usability feature, especially when scrolling through very long pages. On Mac OS kinetic scroll is done server-side, and so cumulative scroll is supported for all applications. On Linux each application/toolkit has to implement kinetic scroll by its own, and currently Epiphany doesn't support that.
This is an alternative, and possibly better, solution for #737 (closed) and #355 (closed).
Soft-blocks gtk#1308 (closed)