I noticed on my FF 26.0 that the responsive design view was upgraded to have a touch simulator. Now when I tried it I could not get it to dissable.
I tried togling it and leaving the responsive view and reloadig the page and even opening the page up in a new tab. Not even closing the browser and reopen the page gets rid of it the touch simulator, it is still on.
EDIT : I even tried to do a re-install, but no luck. It's still there.