This is a discussion on Redirect from google/yahoo on firefox within the Resolved HJT Threads Redirect from
For a long-term fix for redirects caused by. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address Strictly block all popup requests from any website by default. Allow users to manage user certificates-Users can manage only user-imported certificates, but they can’t change trust settings for built-in certificates. Users can edit trust settings for all CA certificates, remove user-imported certificates, and import certificates.
Allow users to manage all certificates-This is the default.