Sorry, no, the firefox-patch.exe or firefox-patch.js is a malware installer that keeps popping up on different sites to evade blocking. The page abuses the Firefox logo to trick users into thinking it's official. Did Windows Defender block the download? If not, you may need to do some cleanup. As a starting point, you can use Malwarebytes Anti-Malware: * https://www.malwarebytes.com/mwb-download/ ---- Do you know which of the two files you downloaded (the .exe or the .js)? '''If you downloaded that .js file:''' Do not open it, it uses a Windows administrative script tool to immediately retrieve and install malware. When you are using the downloads panel (the one attached to the toolbar button), be careful not to click anything as that may run it. Instead, right-click it and choose Open Containing Folder. That will launch a file window with the unwanted download highlighted, and then you can press the Delete key to send it to the Windows Recycle Bin. If the download has already disappeared from the panel, the same mouse action works in the full download list (Ctrl+j or "Show All Downloads"). '''If you want to keep the file around for research, it is essential to very carefully change the file extension to something that is non-executable, such as .txt.''' Windows hides common file extensions like .js and .txt (a dumb default!). You can find the steps to change this setting so you can see and change file extensions here: [http://windows.microsoft.com/en-us/windows/show-hide-file-name-extensions]. Then you could right-click the file, choose Rename, and delete the .js extension and replace it with .txt.