Some people have bad installs others have bad updates. Me, like it was before, just new and working. So with that... Please uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. Reinstall with Current Release Firefox 57.0 with a Full Version Installer https://www.mozilla.org/firefox/all/ I suggest updating your Video Card Drivers as tons of issues with old or corrupted drivers. Major cause of headaches. Please uninstall out dated ans security risk Shockwave Flash 26.0 r0 Flash Player Version: 27.0.0.187 Current version yesterday. 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. <Windows Only> Please let us know if this solved your issue or if need further assistance.