Hi,
Open the Manage Extensions page in JoomSEF, find the efront component there, open its parameters (click its name) and on the Common tab set Handling to Don't SEF. You can also first try the JoomSEF basic rewriting, which should also work and URLs should be a little nicer.
You will need to use the Manage SEF URLs page to delete the already created URLs for the efront component and then clear the JoomSEF's cache, so the URLs can be recreated with new configuration.
Best regards,
ARTIO Support Team
