messing with a chromium install (it's good for pages FF barfs on) and it seems impossible to disable middle-click autoscroll while still allowing mouse gestures via middle click Afficher plus
i suspect Disable Autoscroll's autoscroll-disabling action inadvertantly kills other middle-click functionality too
https://chrome.google.com/webstore/detail/no-smooth-scrolling/oikddacoldignalphkgeppnpalkmkgbo
since chromium v46 it's apparently also now impossible to remove the UI's pointless profile menu/button
i don't like when browsers won't bend to yr will. what a poopcrap