Did you try this page: https://get.adobe.com/flashplayer/ Make sure to uncheck any unwanted extras before downloading. If that doesn't work, do you get any specific error messages? Adobe also has full installers available from here if their small installer isn't able to retrieve it for you: https://www.adobe.com/products/flashplayer/distribution3.html Select either the MSI or EXE file on the row for "Firefox and Netscape Plug-In compatible applications – NPAPI"