.bin extension defaults to wrong action and is not listed in options applications tab. I can't change the action.

Question

I recently installed VLC player and it has overtaken my system.
When I click on .bin (ext) files in a Firefox browser window, the default action is now listed as "VLC.bin (default)" and nothing I do can change it. I want the default action to be to download the file and I would like to remove any option related to VLC, since no .bin file should ever be associated with that program.
There is no listing for a .bin extension for VLC (or any other program, for that matter*) in the Options/Applications tab, nor is VLC player the default action for anything listed except .wav files.
I have tried the following:
1. searched the options/applications tab but found nothing.
2. searched "about:config" for any entries with "bin", ".bin", or "vlc" (one at a time) and found nothing.
3. searched the registry for bin extension entries. I found one:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.bin\OpenWithProgids]
"bin_auto_file"=hex(0):
"VLC.bin"=hex(0):
I deleted the key and rebooted. No change.
4. Double checked [HKEY_CURRENT_USER\Software\.. Gabest and Mozilla keys for anything that could be causing this behavior.
Found nothing.
Any help would be appreciated.
*As far as I can tell. However, the applications tab cuts off many of the extension names and the column cannot be extended, so I can't be certain. VLC added 34 extensions to the list (!), most of which default to using the Quicktime plugin 7.6.8.

Answer 1

Thanks jscher2000, I tried your suggestion, but no joy (as expected). None of the extensions were .bin, and in fact, I can't find a single listing for handling the .bin extension in the entire (unfiltered) list.
That's why I'm so confused. Where is Firefox getting the name "VLC.bin (default)" from in the first place?
cor-el, I checked out the link that you posted.
I don't have an entry for "browser.download.pluginOverrideTypes" and the entry "plugin.disable_full_page_plugin_for_types" was empty (default setting).
My bad, but I forgot to mention in my first post that I had also tried renaming the mimetypes.rdf file in my "Application Data\Mozilla\Firefox\Profiles\xxx.default\" to .old to no avail.
Firefox created a new, almost empty file, but it didn't change the behavior for .bin files. I removed the new file and put the old file back in place after determining that clearing the file did not help, since I am otherwise happy with my current file-type options.
However, since the option to "Always perform this action" is grayed-out, I am looking into the possibility that the website is sending a misconfigured MIME type or is assigning "Content-Disposition: attachment" to the download. What's odd, though, is that I've never had problems getting binary files from the site in the past, and the problem started when the VLC player was installed.
I'll post back after I check into the server header data.