I have a laptop with touchscreen but since I use it with Linux I was unable to use it to scroll web pages.
The only things it was doing was to select the text...pretty useless..

So I've found how to be able to configure it.
2 things to do :

• Change "dom.w3c_touch_events.enabled" to 1 in the about:config of Firefox
• set the variable MOZ_USE_XINPUT2=1

I've defined it directly into the /etc/environment file so it will be done for all accounts