SINCE INSTALLING I.E. 11 IN WINDOWS 7, UNABLE TO DOWNLOAD OR SAVE FILES IN FIREFOX; HOW DO I CORRECT THIS PROBLEM?

Question

This is what I wrote to the Microsoft Community seeking a correction of the issue (still no reply to my request for assistance with this matter from them):
Can I go back to I.E. 10? Ever since I installed version 11, I've had an unstable desktop. It appears to have damaged the Windows Explorer interface in other browsers, such that when I open the popup window to save downloads and/or other files, all that shows up in the window are the "Save" and "Cancel" buttons, but it does not show the interface to choose where to save the file(s), thus I cannot save anything at all in those other browsers. I primarily use Firefox, and every time I want to save a file, I have to startup I.E. 11 to save anything and everything.
I would much prefer going back to I.E. 10 which caused me no such problems; but, if I cannot go back to I.E. 10, how do I correct this issue so I can save files in other browsers? This situation has been going on for months now, and I've waited patiently thinking that there would be an update for Microsoft and/or Firefox (as well as Chrome and Safari) that would correct this problem by now; but, even though I have all of the latest updates and versions installed, no updates have corrected the issue at all. I would very much appreciate any help you can give.
Oh, also, I have tried uninstalling Firefox completely at least twice, and rebooting before reinstalling it to the latest version, but that has not corrected the problem either. I additionally tried turning I.E. 11 off in Windows, and then tried running Firefox to see if the download interface would be restored, but it still had the very same issue(s) [no ability to choose the place to save files, and thus being completely unable to save any downloads and/or other files]. I can't believe that this problem has been going on for so long now without any update(s) resolution.

Answer 1

The following is the latest that I've written to Microsoft about this entire matter:
You're still not getting it. I've never had a problem with downloading and/or saving files in I.E.; and I very clearly explained to you guys that the problem is in the other browsers, but it's caused by a malfunction in the Windows Desktop.
Why can't someone with English as their first language, please help me?
But, regardless, just in case your recommendation(s) had anything to do with anything, and were perhaps creating the problem in the other browser (though I was pretty sure that it had nothing to do with my problem), I made I.E. the default browser; yet, of course, that did NOT correct the problem. Also, when I set I.E. as the default browser, the explorer.exe file crashed and restarted.
Nevertheless, because I (wrongly) thought that I couldn't uninstall I.E. 11, because somehow I missed the listing for it in Windows Programs and Features, I went to the latter again and found I.E. 11 listed this time, and uninstalled it. After it completed, I rebooted the laptop. Then I went into Windows Update and looked for what version of I.E. it was then going to want me to update to since I.E. 11 was uninstalled.
I saw that I.E. was taken all the way back to I.E. 8 and had updates for it as well as to update to I.E. 9, so I did the former updates first, rebooted, then updated to I.E. 9 and rebooted again. Then I ran Windows Update again checking for new updates, and found that there was a cumulative security update for I.E. 9, which I installed and then rebooted once again.
Then, upon checking for new updates in Windows Update again, I found that the option(s) to update to I.E. 10 or 11 were now optional, which they weren't before, and then I updated to I.E. 10 and rebooted once more. Upon Windows restarting, I checked again for new Windows Updates and there were some security updates, so I installed them and restarted the laptop.
This time upon rebooting, I checked Windows Update for further new updates and there were none; so I'm now completely updated to I.E. 10; but, because going back to I.E. 10 corrected some of the instability with the Windows Desktop, I am ignoring the optional update to I.E. 11, and I am NOT going to update to it again.
Throughout the update process, upon restarting Windows, I kept starting Firefox to see if the "Save As" window then worked, but throughout the entire update process, as well as when I completed it, I still could not download or save files [because the window still doesn't show where to save the file(s)---please see the Print Screen copy of what it looks like, attached to this message (sorry, but I.E. won't let me browse for the file, and the tab or windows crashes and reloads every time when I click "Browse" to look for the file to attach)].
So, I decided to try uninstalling Firefox for the fourth time, rebooting and reinstalling it, hoping that might correct he issue this time since I downgraded to I.E. 10, but the "Save As" window still looks the same, and I am still completely unable to save any files or downloads while in Firefox.
Oh, I also tried resetting all of the Windows Folder Options again to default settings, and reset all of the folders, in case that had anything to do with the problem, but that still did NOT correct the issue either.
I am now going to try creating a new user account also with Administrator privileges, changing Users, trying to run Firefox in it, and see if the problem with the "Save As" window is still an issue....
In the new User profile, the situation is even worse. When I try to save any file(s) in Firefox, Firefox crashes (latest version).
I wrote to Firefox a couple of days ago, but an arrogant "techie" is giving me the run around and is not helping me, and no else is helping with the matter so far.
Postscript: Now Windows Explorer (the explorer.exe file) that runs the desktop crashed and restarted again twice while I was trying to print a file, and it appears that it won't let me print at all anymore.