Solved Firefox update 20.0 not so good.

Ah...
The first icon I pinned was from an Open FF Window (in taskbar), that I opened from a Shortcut in my Toolbar.
After I pinned the 2nd icon from the Start menu, the "Pin to taskbar" is no longer available in the Start menu.

So, it seems you can only pin an item once from the same location (Start menu, Toolbar, ...) ???
Just guessing here, have to play with this more...
 

My Computer My Computer

At a glance

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x6...AMD Athlon II x4 6206GB GSkill DDR2 800AMD 4670 GPU + AMD 4200 IGP
Computer type
PC/Desktop
Computer Manufacturer/Model Number
home built
OS
Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
CPU
AMD Athlon II x4 620
Motherboard
Gigabyte GA-MA785G-UD3H
Memory
6GB GSkill DDR2 800
Graphics Card(s)
AMD 4670 GPU + AMD 4200 IGP
Sound Card
on board Realtek ALC889A
Monitor(s) Displays
RCA 40" LCD TV, Insignia 32" LCD TV, HP 15" LCD monitor
Screen Resolution
1680 x 1050
Hard Drives
OCZ Vertex 3 120GB,
Samsung F3 1TB (3),
Several others - WD, Seagate, Hitachi, ...
PSU
Corsair 500 W
Case
Rosewill mid tower
Cooling
CM 90mm rifle
Keyboard
Gyration wireless, Logitech wireless, Dell USB wired
Mouse
Gyration wireless, Logitech wireless, V7 USB wired
Internet Speed
Spectrum - 100Mbps D / 10Mbps U
Antivirus
Avast, MBAM3, EMET, WinPatrol
Browser
Pale Moon, Firefox, IE
Other Info
2 multi-boot PC's
Mainly HTPC/Office/Gen purpose (no gaming).
Trendnet USB KVM.
LG DVD burner/Blue Ray Player.
Tray system for removable SATA backup drives.

Not currently OCd, under-volted.
I use Hybrid sleep, rarely re-boot or shutdown.

Hauppauge HD-PVR, Avermedia PCIe TV Tuner, Hauppauge PCI TV Tuner.
It looks like it's some quirk when pinning from a toolbar...
I use my own toolbar rather than Quick Launch.
I can pin as many times as I want from the toolbar...
But after the 2nd icon is pinned, additional pins don't add a new icon to the taskbar...
I then have to repeatedly unpin the 2nd icon as many times as I pinned it, to remove the 2nd icon...
:rolleyes:
 

My Computer My Computer

At a glance

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x6...AMD Athlon II x4 6206GB GSkill DDR2 800AMD 4670 GPU + AMD 4200 IGP
Computer type
PC/Desktop
Computer Manufacturer/Model Number
home built
OS
Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
CPU
AMD Athlon II x4 620
Motherboard
Gigabyte GA-MA785G-UD3H
Memory
6GB GSkill DDR2 800
Graphics Card(s)
AMD 4670 GPU + AMD 4200 IGP
Sound Card
on board Realtek ALC889A
Monitor(s) Displays
RCA 40" LCD TV, Insignia 32" LCD TV, HP 15" LCD monitor
Screen Resolution
1680 x 1050
Hard Drives
OCZ Vertex 3 120GB,
Samsung F3 1TB (3),
Several others - WD, Seagate, Hitachi, ...
PSU
Corsair 500 W
Case
Rosewill mid tower
Cooling
CM 90mm rifle
Keyboard
Gyration wireless, Logitech wireless, Dell USB wired
Mouse
Gyration wireless, Logitech wireless, V7 USB wired
Internet Speed
Spectrum - 100Mbps D / 10Mbps U
Antivirus
Avast, MBAM3, EMET, WinPatrol
Browser
Pale Moon, Firefox, IE
Other Info
2 multi-boot PC's
Mainly HTPC/Office/Gen purpose (no gaming).
Trendnet USB KVM.
LG DVD burner/Blue Ray Player.
Tray system for removable SATA backup drives.

Not currently OCd, under-volted.
I use Hybrid sleep, rarely re-boot or shutdown.

Hauppauge HD-PVR, Avermedia PCIe TV Tuner, Hauppauge PCI TV Tuner.
Thank you folks for all your suggestions. I know it can be done because I have two FF icons on my other W7 computer. I just don't remember how I did it.
 

My Computer My Computer

At a glance

Windows 10 Pro. 64/ version 1709 Windows 7 Pr...Intel i7-6800K @ 4.3Corsair Platinum 16 gig @2400EVGA GTX 1070 OC
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home made Desktop
OS
Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
CPU
Intel i7-6800K @ 4.3
Motherboard
ASUS X-99 Deluxe II
Memory
Corsair Platinum 16 gig @2400
Graphics Card(s)
EVGA GTX 1070 OC
Monitor(s) Displays
Asus 27" LED LCD/VE278Q
Screen Resolution
1920-1080 or 1280-720 HDMI
Hard Drives
INTEL SSD 730-240 Gb Sata 3.0/
PSU
EVGA Platium 1200W
Case
Phanteks Luxe Tempered Glass 8 fans/ one radiator
Cooling
XSPC/ Water Cooled CPU
Keyboard
Das 4 Professional
Mouse
Logitech M705/MX Anywhere 2-S
Internet Speed
100 mbits
Antivirus
Microsoft Security Essentials/ Malwarebytes Premium 3.0/ SAS
Browser
I.E. 11 default/Firefox/ ISP Time Warner Cable/Spectrum
Other Info
LG BluRay Burner/
Sound system-KLipsch-THX/
Icy Dock ssd Hot Swap bays.
I'm not sure how else to get 2 pinned FF Icons in the taskbar...
But I can recreate getting 2 FF pinned Icons using a toolbar...
Maybe you could use this approach until you find an easier way?

TBPSP03.PNG
 

My Computer My Computer

At a glance

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x6...AMD Athlon II x4 6206GB GSkill DDR2 800AMD 4670 GPU + AMD 4200 IGP
Computer type
PC/Desktop
Computer Manufacturer/Model Number
home built
OS
Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
CPU
AMD Athlon II x4 620
Motherboard
Gigabyte GA-MA785G-UD3H
Memory
6GB GSkill DDR2 800
Graphics Card(s)
AMD 4670 GPU + AMD 4200 IGP
Sound Card
on board Realtek ALC889A
Monitor(s) Displays
RCA 40" LCD TV, Insignia 32" LCD TV, HP 15" LCD monitor
Screen Resolution
1680 x 1050
Hard Drives
OCZ Vertex 3 120GB,
Samsung F3 1TB (3),
Several others - WD, Seagate, Hitachi, ...
PSU
Corsair 500 W
Case
Rosewill mid tower
Cooling
CM 90mm rifle
Keyboard
Gyration wireless, Logitech wireless, Dell USB wired
Mouse
Gyration wireless, Logitech wireless, V7 USB wired
Internet Speed
Spectrum - 100Mbps D / 10Mbps U
Antivirus
Avast, MBAM3, EMET, WinPatrol
Browser
Pale Moon, Firefox, IE
Other Info
2 multi-boot PC's
Mainly HTPC/Office/Gen purpose (no gaming).
Trendnet USB KVM.
LG DVD burner/Blue Ray Player.
Tray system for removable SATA backup drives.

Not currently OCd, under-volted.
I use Hybrid sleep, rarely re-boot or shutdown.

Hauppauge HD-PVR, Avermedia PCIe TV Tuner, Hauppauge PCI TV Tuner.
I figured out why my Google home page wasn't working.
It was a false Google home page. I reset Google to my home page again and it works as it should at the present time.
I have ran many security scans and nothing was found.
 

My Computer My Computer

At a glance

Windows 10 Pro. 64/ version 1709 Windows 7 Pr...Intel i7-6800K @ 4.3Corsair Platinum 16 gig @2400EVGA GTX 1070 OC
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home made Desktop
OS
Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
CPU
Intel i7-6800K @ 4.3
Motherboard
ASUS X-99 Deluxe II
Memory
Corsair Platinum 16 gig @2400
Graphics Card(s)
EVGA GTX 1070 OC
Monitor(s) Displays
Asus 27" LED LCD/VE278Q
Screen Resolution
1920-1080 or 1280-720 HDMI
Hard Drives
INTEL SSD 730-240 Gb Sata 3.0/
PSU
EVGA Platium 1200W
Case
Phanteks Luxe Tempered Glass 8 fans/ one radiator
Cooling
XSPC/ Water Cooled CPU
Keyboard
Das 4 Professional
Mouse
Logitech M705/MX Anywhere 2-S
Internet Speed
100 mbits
Antivirus
Microsoft Security Essentials/ Malwarebytes Premium 3.0/ SAS
Browser
I.E. 11 default/Firefox/ ISP Time Warner Cable/Spectrum
Other Info
LG BluRay Burner/
Sound system-KLipsch-THX/
Icy Dock ssd Hot Swap bays.
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