Firefox taskbar pinned icon opening window with a duplicate icon

I accidentally unpinned my Windows 7 Firefox taskbar icon. While I was able to re-add it easily enough, clicking it to open FF resulting in a duplicate icon being spawned which was where FF was opened. I had to google a bit to find a fix and here it is:

• Close Firefox and remove all pinned icons from the taskbar.
• Open Windows Explorer and navigate to the Firefox directory at C:\Program Files (x86)\Mozilla Firefox.
• Double click on firefox.exe to open the program.
• Now, right click on the taskbar icon and pin it.
• Close Firefox and reopen it using the new taskbar icon to confirm that it is now working as expected.

Hope this helps!