I have found using a download manager works better. There are even managers that run separately from Firefox. -------------- You are using an old version of Firefox. Is there a reason? https://support.mozilla.org/en-US/kb/update-firefox-latest-version '''49.0.2''' ----------- Security Issue: Update your Flash Player '''Note: Windows users''' should download the '''active_x''' for ''Internet Explorer.'' '''and''' the '''plugin''' for ''Plugin-based browsers'' (like Firefox). '''Note: Windows 8 and Windows 10''' have built-in flash players and Adobe will cause a conflict. Install the '''plugin only.''' Not the '''active_x.''' Flash Player '''Version: 23.0.0. 205''' Flash Player (Linux) '''Version 11.2. 202.643''' https://get.adobe.com/flashplayer/ Direct link scans current system and browser '''Note: Other software''' is offered in the download. https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) '''Note: Other software''' is offered in the download. ------------- See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration