Yes, a lot of downloaders try to earn a little now on the side by coming bundled with such junk- and crapware.
First do a scan with both MBAM and SAS and further cleanse with AdwCleaner.
Searchdirect download link for the SearchReset Firefox extension -> SearchReset Firefox extension
In GoogleChrome the toolbar also changes the policy set for downloads, you have to manually reset this via
regedit Go to that Registry Editor
Go to : HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\
Double-click at the UpdateDefault or DefaultUpdate
And type 0 to 1
Exit Registry Editor and Go to your browser!
If you do not feel up to doing it manually, seek help here from one of our qualified malware removal expert,
they will guide you through the uninstall prosedures,
P.S. The extension for fx is always a good tip to get your back to your default search settings...