Bueller? Is this the right place to report bugs like this?

I also had the same problem. I don't know if it's a bug or not. It seems to have started happening since a recent update.

I may have found a workaround, or fix: 1) Close Firefox and unpin all Firefox Taskbar icons. 2) Start Firefox from its \Program Files (x86)\Mozilla Firefox directory. 3) Right click on the Taskbar icon and select "Pin this program ...".

Now the Firefox Taskbar icon will behave as expected. Close all browsers and the icon remains. Click it and it opens a browser window and shows a border around the icon (one icon only). Middle or Right click it to open additional browser windows and their icons will overlay the original pinned icon.

If the pinned icon was created by dragging the file out of the directory onto the Taskbar, or Right clicking the file and selecting "Pin to Taskbar", then clicking on the Taskbar icon opens a browser and creates a second independent icon in the Taskbar.

I have no idea why, but that's the way it works on my Windows 7, latest updates, Firefox 5.0.

First of all, I apologize for my bad English, I'm an Italian FF 5 user and I had this issue too. However I found a workaround!

1. Unpin the old firefox icon
2. Go to c:\Program File (x86)\Mozilla Firefox\
3. Double click on "firefox.exe"
4. A Firefox windows will appear, in the supertaskbar a firefox's icon will appear, too.
5. Pin the new icon by a right click on it and select "Pin to Taskbar"
6. The firefox's icon will tourn in a whitebox
7. Make sure that you see the hidden folders (Microsoft Knowledge Base)
8. Go to C:\Users\%yourusername%\AppData\Local
9. Delete "IconCache.db"
10. Open the taskmanager
11. Kill explorer.exe by clicking on End Process
12. In the taskmanager, File -> New Task (Run...) --> write "explorer.exe" without the quotation mark, press ok
13. Problem (hopefully) fixed

Again, excuse me for my bad English

There are 2 ways to fix this. The first way if you are using the default Firefox icon:

1.Pin the Firefox to the taskbar. Click on the pinned Firefox to open the duplicate

2.Click on the duplicate Firefox icon that's open and pinned that to the taskbar

3.Unpin the original Firefox icon

If you plan on changing Firefox Icon instead of the default

1.use that same method above but do not change the icon just yet

2.now make sure that the browser is close. hold down SHIFT+right click on the Firefox that's pinned to the taskbar

3.change the icon of your choice through Properties

4.copy and paste this line below into your START and run it. Your explorer will refresh and you will see your new icon for Firefox

TSKILL EXPLORER

just follow

1) Close Firefox and unpin all Firefox Taskbar icons. 2) Start Firefox from its \Program Files (x86)\Mozilla Firefox directory. 3) Right click on the Taskbar icon and select "Pin this program ...".

Now the Firefox Taskbar icon will behave as expected. Close all browsers and the icon remains. Click it and it opens a browser window and shows a border around the icon (one icon only). Middle or Right click it to open additional browser windows and their icons will overlay the original pinned icon.

mulțumesc mult