You have two seemingly sketchy extensions, but these likely were installed externally to Firefox, so I suggest starting here: 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. Take out as much trash as possible here. Then, in Firefox, open the '''Add-ons page''' using either: * Ctrl+Shift+a * "3-bar" menu button (or Tools menu) > Add-ons In the left column, click Extensions. Then, if in doubt, disable (or Remove, if possible) unrecognized and unwanted extensions. 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. Your system info shows the presence of a '''user.js file''', which will override your settings each time you start Firefox, so it's a good idea to remove that or edit out the parts you don't actually want. This article has the steps for that: [[How to fix preferences that won't save]]. Next... your home page you can fix in the '''Options dialog'''. See: * [[Startup, home page and download settings]] * [[How to set the home page]] Finally, you can "mop up" remaining issues with the '''scanning/cleaning tools''' suggested in this support article: [[Troubleshoot Firefox issues caused by malware]]. Success?

See this - http://malwaretips.com/blogs/remove-astromenda-virus/