Hello,

Please see:

• http://malwaretips.com/blogs/remove-from-doc-to-pdf-toolbar/

What might also help is:

• http://malwaretips.com/blogs/remove-ask-toolbar-and-search/

If you can't find it in your Firefox add-ons, then try looking at your list of installed programs - Windows Control Panel > Programs and Features

this is one of the most common problem when you install or download any application from unknown place. it automatically install this Ask toolbar and search. To remove this you have to do it manually or it can be done by an application. check here for the whole solution.., How To Remove Ask Toolbar From Your Browser Completely