Your home page can be overridden in a couple ways, but this one probably is caused by malware. Here's my suggested procedure for tracking down and cleaning up bad add-ons and other hijackers. I know it seems long, but it's really not that bad. (For Windows Vista, 7, 8, 8.1; XP is somewhat different) (1) Open the Windows '''Control Panel''', Uninstall a Program. After the list loads, click the "Installed on" column heading to group the infections, I mean, additions, by date. This can help in smoking out undisclosed bundle items that snuck in with some software you agreed to install. ''Be suspicious of everything you do not recognize/remember, as malware often uses important or innocent sounding names to discourage you from removing it.'' Take out as much trash as possible here. (2) Open Firefox's '''Add-ons page''' using either: * Ctrl+Shift+a * "3-bar" menu button (or Tools menu) > Add-ons * in the Windows "Run" dialog, type or paste <br><code>firefox.exe "about:addons"</code> In the left column, click '''Plugins'''. Set nonessential and unrecognized plugins to "Never Activate". In the left column, click '''Extensions'''. Then, if in doubt, disable (or Remove, if possible) unrecognized and unwanted extensions. ''All extensions are optional; none come with Firefox.'' 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? (3) You can search for remaining issues with the '''scanning/cleaning tools''' 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. ---- Two other things to check after the initial cleanup: (4) Is there any user.js file? Firefox allows an optional settings file named user.js to override your saved preferences from the previous session at startup. Unless you created that file yourself, it may contains settings from an add-on or external software. You can check and remove the file using the steps in this article: [[How to fix preferences that won't save]]. Note: by default, Windows hides the .js file extension. To work with files as accurately as possible, I suggest showing all file extensions. This Microsoft support article has the steps: [http://windows.microsoft.com/en-us/windows/show-hide-file-name-extensions]. (5) Make sure your Firefox shortcut is clean. Double-check the shortcut you use to start Firefox. Either: * 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. The Target line should not have anything after this part: * '''64-bit Windows, standard 32-bit Firefox:''' "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" * Otherwise: "C:\Program Files\Mozilla Firefox\firefox.exe" If any URLs are listed after that, clear them out and save your change. To test, you can either: * Desktop shortcut: double-click the icon to launch a new window * Pinned taskbar icon: right-click the icon, click Mozilla Firefox to launch a new window If you get your home page, it worked. Some users have reported a faster fix for a pinned taskbar item: * unpin the current icon * go into the Start menu, right-click Mozilla Firefox, then Pin to Taskbar Any improvement?