Hi John, one possible culprit would be an extension. You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either: * Ctrl+Shift+a (Mac: Command+Shift+a) * "3-bar" menu button (or Tools menu) > Add-ons * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. Then cast a critical eye over the list on the right side. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). Any improvement? ---- Once you have eliminated any extensions that may be overriding your choice, please see this article if needed: [[How to set the home page]]. And then, this may be part of a larger infection. I suggest also checking the Windows Control Panel, Add/Remove Programs, for any recent additions that may be part of a bundle of cr*p. You also could consider supplementing your regular security software with the cleaning tools listed in our support article: [[Troubleshoot Firefox issues caused by malware]]. Success?