https://support.mozilla.org/en-US/kb/update-firefox-latest-version '''42.*''' ----------- Security Issue: Update your Flash Player '''Version 19.0.0.245<br>https://www.adobe.com/products/flashplayer/distribution3.html''' '''Note: Windows users''' should download the ‘’’active_x’’’ for “Internet Explorer,” '''and''' the ‘’’plugin’’’ for “Plugin-based browsers” (like Firefox). Note: Edge on Win10 does not use ActiveX version but its own Flash. ----------- See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration