Running Win7 Pro
Mozilla Firefox v56 Portable
This apparently happened after I checked under Options/General/Startup for FF to check if it's the default browser.
Now there is a 2nd "Firefox" entry in 'Default Programs' that apparently is using the default Firefox profile instead of the customized profile it should use. It opens in a different layout instead of my 'classic' layout.
This happens when I click on a link in a e-mail in Thunderbird. If I click on the desktop shortcut it opens correctly. I tried that program 'Register Firefox', but it didn't change anything.
I tired clicking on the two "firefox.exe' under the applications folder, but those opened up another different layout. This v56 is the only version in 'C' drive.
I assume this is a registry entry.
(I tried placing a link to a screen shot, but the forum keeps shorting it making it worthless.)
There's a shortcut you need to delete. If you open up Windows Explorer and paste in the following:
%APPDATA%\Microsoft\Windows\Start Menu
You can then manually adjust/delete any of your account's start menu shortcuts. It's either in there or within the Programs folder in there.
Sometimes, the impossible can become possible, if you're awesome!
There were two shortcuts that were created, one on the desktop and the other in the start menu, it wasn't in the "Startup" folder.
I opened up 'properties' and both pointed to the 64bit version of "Firefox.exe" in in the Application/Firefox64 folder.
If you are referring to this folder buried in the annoying "Users" folder;
C:\Users\User1\AppData\Roaming\Microsoft\Windows\Start Menu,
other than those shortcuts that I already mentioned, nothing else is there. Clicking on a link in Thunderbird, still activates firefox.exe in the 'Firefox64' sub folder if I haven't already opened FF up with a direct shortcut.
If I re-name "firefox.exe" to something else, clicking on a e-mail link in Thunderbird becomes a dead response (again, if FF wasn't already opened).
Since this forum wouldn't let me post a longer link in it's complete form, I should of described what the entries looked like;
Firefox
Mozilla Firefox Portable Edition
Ok, I went back in Default Programs, opened up the 'Portable" entry and added a check mark above the already individual checked 'Protocols' and that apparently solved the problem. But the question remains, hoe can I delete/remove that 2nd 'bogus' entry in Default Programs'?
But there is a better way which was what I was looking for;
https://www.sevenforums.com/tutorials/136145-default-programs-remove-lis...
Of course if there was a context menu option of "delete" in that useless Default Programs in the 1st place, the problem would of been solved long ago.
Using that registry entry (RegisteredApplications), I also get rid of IE in the list since I stopped using that 18 years ago.