Avast Browser Cleanup is a Browser software developed by AVAST Software a.s.. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Avast Browser Cleanup:

avast! Browser Cleanup allows removing of well-known annoying toolbars. “Remove” means here uninstall and remove the toolbar and all its components completely from your computer. This action cannot be undone. However, removing an add-on sometimes might not be desired always as you might not be sure what’s really behind this add-on. For this reason avast! Browser Cleanup also offers a button “Disable”. Disable just switches off the functionality of the add-ons. The add-on itself persists on disk. You can undo this action just by clicking “Enable”. This will Re-Enable the add-on and all functionality is back.