Hello, First problem is you are using windows 10 do not run windows 10. Go back to 8.1 or 7. Then I suggest you learn how to use a linux distro as they are the future. Windows 10 is still in its beta stage contrary to what the may be saying. Also, W10 isn't run by you or your settings. If you changed anything from its default setting it will get angry and do any number of things. Also, absolutely all information is captured on W10 OS. Now the stock answer. Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:

• Click the menu button , click Help and select Restart with Add-ons Disabled.

If Firefox is not running, you can start Firefox in Safe Mode as follows:

• On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac: Hold the option key while starting Firefox.
• On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
  (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

When the Firefox Safe Mode window appears, select "Start in Safe Mode".

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help others with the same problem. (Windows 10 *cough*)

You can check for problems caused by a possible corrupted user agent.

See:

• https://support.mozilla.org/kb/Finding+your+Firefox+version
• https://support.mozilla.org/kb/websites-say-firefox-outdated-or-incompatible

Check that you do not run Firefox in compatibility mode. You can open the Properties of the Firefox desktop shortcut via the right-click context menu and check the "Compatibility" tab. Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

Some housekeeping. Your System Details are showing four versions of Shockwave for Director -

Adobe Shockwave for Director Netscape plug-in, version 12.1.5.155

Adobe Shockwave for Director Netscape plug-in, version 12.2.1.171 Adobe Shockwave for Director Netscape plug-in, version 12.2 Adobe Shockwave for Director Netscape plug-in, version 12.1.9.160

I suggest you remove them all and start again.