Heres how to get rid of it from mozilla firefox
First up go to tools: addons: and click uninstall
Second up (because doing the first step apparently does nothing):
right click on the toolbar (in any space that doesnt have an icon, i
personally like to click between the X and the picture of a house.
Then choose customize... now left click the ask.com search bar and
pull it into the window you have just opened.
Bam, its gone and may they grow boils upon the ganglion in their
sphincters
-The Dutch Man