Hi, Please always : *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles Security Issue : Since your Flash 19.0 r0 is so old please remove it by using this : https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Note: you may have to run the above with a Right Click and Run as Administrator. Flash Player Version: 29.0.0.140 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only> A little confused as to what version/s are the issue : Please : uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files , C:\Program Files(x86) & C:\ProgramData Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer Reinstall with Current Release Firefox 59.0.3 with a Full Version Installer *https://www.mozilla.org/firefox/all/ Please let us know if this solved your issue or if need further assistance.

Done all previous steps (Delete FPlayer, Installed 29 ver, Deleted Mozilla, Clean up all and installed 59.0.3 afterwards). 59.0.3 not working at all (not opening, clicking on icon not change anything). Screenshot attached how it looks like. May be it will help, I'm using Win 10 Pro, GF Game Ready driver 397.31, MS Office Professional 16.