How can I revert Firefox back to previous settings from 10 days ago?

The page is no longer showing some boxes on a webpage, like login boxes on some sites, drop down menus on others, nor the bar at the bottom that used to show weather, NoScripts status, etc. I do not know what I changed (or IF I changed anything) to get this result, but I have to use IE now to view many sites because I don't have complete functionality now. I just want to know if I can go back to a point, say 10 days ago, when it was working correctly.

You seem to have hidden the Add-ons toolbar: View > Toolbars > [X] Add-on Bar
Press F10 or tap the Alt key to bring up the "Menu Bar" temporarily.
Make sure that you allow pages to choose their colors and that you haven't enabled High Contrast in the Windows Accessibility settings.
* http://kb.mozillazine.org/Website_colors_are_wrong
* http://kb.mozillazine.org/Websites_look_wrong
Start Firefox in [[Safe Mode]] to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
* https://support.mozilla.com/kb/Safe+Mode
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

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How can I revert Firefox back to previous settings from 10 days ago?

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