"C:\Program Files (x86)\Mozilla Firefox\firefox.exe"

Does it appear every time you click the Home button, or only when you use a desktop shortcut (or pinned Taskbar item)? '''''Investigate Your Shortcut''''' The Firefox icon can be set up to launch specific pages at startup (or more specifically, when you use the icon). To check whether that is set: First, open the shortcut as follows: * Desktop shortcut: right-click the icon, choose Properties * Pinned taskbar icon: right-click the icon, right-click Mozilla Firefox, choose Properties Windows normally will select the Shortcut tab. If not, go ahead and click the Shortcut tab. You'll see the Target highlighted. On 64-bit Windows, that usually is no more and no less than the following: "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" If anything follows after that, try clearing it out. After OK'ing the Properties dialog, you can test right away to confirm that Firefox now launches only your home page. Either: * double-click desktop shortcut * right-click pinned taskbar icon, click Mozilla Firefox Success? '''''Investigate Extensions''''' 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 In the left column, click Extensions. Then cast a critical eye over the list on the right side. All extensions are optional. If in doubt, disable. Often a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step. Any improvement? '''''Other Cleanup''''' <p>(1) Open the Windows <strong>Control Panel</strong>, Uninstall a Program to check for bundleware.</p> <p>After the list loads, click the "Installed on" column heading to group the infections, I mean, additions, by date. This can help surface undisclosed bundle items that snuck in with some software you agreed to install. <em>Be suspicious of everything you do not recognize/remember, as malware often uses important or innocent sounding names to discourage you from removing it.</em></p> <p>Take out as much trash as possible here. If you're not sure, feel free to post program names or a screenshot of the list.</p> <p>(2) You can search for remaining issues with the <strong>scanning/cleaning tools</strong> listed in our support article: [[Troubleshoot Firefox issues caused by malware]]. These on-demand scanners are free and take considerable time to run. If they finish quickly and especially if they require payment, you may have a serious infection. I suggest the specialized forums listed in the article in that case.</p>