Microsoft Updates Update, Explains Firefox Extension
Last week, Microsoft released a series up patches and updates, one of which was an "Update for Microsoft Search Enhancement Pack," whatever the heck that is. But it was marked "important" as opposed to "optional," so most people probably just installed it.
What MS didn't explain though, was that the update would be installing an IE add-on as well as an extension for Firefox called Search Helper Extension.
According to Microsoft, the update is a component in the Windows Live Toolbar, MSN Toolbar and Bing Bar, not the toolbar itself. The update had, also according to MS, a bug that installed the Firefox extension for users that had not upgraded to the latest version of Bing Bar. They have corrected the bug.
Unfortunately, the extension can't be uninstalled easily for those that recieved it unwittingly. To that end, they provided ars technica with step-by-step removal instructions.
You can find those instructions, as well as more information about the whole thing, on the ars technica site.
Photo from ars techinca.