This https:// link works for me (http:// doesn't work), I get redirected to a login.microsoftonline.com login page. *https://auditcenter.dqsus.com/ ---- You can remove all data stored in Firefox for a specific domain like dqsus.com via "Forget About This Site" in the right-click context menu of an history entry ("History -> Show All History" or "View -> Sidebar -> History"). Using "Forget About This Site" will remove all data stored in Firefox for this domain like history and cookies and exceptions and cache, so be careful. In current releases you should keep passwords and bookmarks. If you have a password or other data for that domain that you do not want to lose, make sure to backup this data or make a note. You can't recover from this 'forget' unless you have a backup of involved files. If you revisit a 'forgotten' website, data for that website will be saved once again. *https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox