How to get rid of MyStart by IncrediBar on Firefox
this worked for me thanks
3] Open Firefox and in the address bar type about:config . Accept the warning. When the list populates, type into the address bar MyStart and see what entries are found. Do the same for Incredibar. If entries are found, you can try and change those to default, but if you are not sure, copy the entries and post them into your reply here.
thanks it save me from all that trouble