Yep, looks like it still isn't handled automatically!
You have to do do some little tweaks for it to work.
First, open Firefox and in the navigation bar, write about:config
Then, search for dom.w3c_touch_events.enabled and change the value of it to 1.
Now, close Firefox and open /etc/security/pam_env.conf with your favorite code editor. You will have to use a sudo here as it is normally protected.
At the bottom of the file , paste this code:
Now, reboot your computer and you should be good to go ! :)