Firefox Not responding" ?

That's a start brightsun,

Since I don't use Firefox I won't be much help from here on out, although if you learn how to post screenshots ( The tutorials I linked ) it will definately help others help you.

Here's a list of basic troubleshooting tips for you to look at,

Basic Troubleshooting
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Win 10 Pro x64
CPU
Intel I5-2500K @3.3GHz
Motherboard
Asrock P67 Extreme4
Memory
16GB G.Skill Ripjaws X (4x4GB)
Graphics Card(s)
EVGA GeForce 750 Ti SC 2GB
Sound Card
ASUS Xonar DG 5.1 Channels 24-bit 96KHz PCI Interface Sound
Monitor(s) Displays
auria eq2367
Screen Resolution
1920 x 1080
Hard Drives
250GB Samsung 850 EVO SSD
1TB WD Blue
1TB Hitachi
PSU
SeaSonic X 650W 80 Plus Gold
Case
Corsair Obsidian 750D
Cooling
Corsair H60, Three 140mm case fans
Keyboard
Logitech Wireless Keyboard K520
Mouse
Logitech Wireless Mouse M310
Internet Speed
Wave Broadband ~ 100 dn 5 up
Antivirus
Windows Defender, Malwarebytes Premium
Browser
Edge, IE11, Chrome
Other Info
Laptop specs: HP g7-1365dx /
CPU: AMD A6-3420M APU with Radeon(tm) HD Graphics /
RAM: Crucial 8Gb (2x4Gb) /
SSD: Crucial M4-CT128M4SSD2 ATA Device/ FW 000F /
GFX: AMD Radeon HD 6520G /
OS: Windows 10 Pro x64
That looks like it might be, here's some simple steps to troubleshoot plug-ins,

Basic Troubleshooting
 

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My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Win 10 Pro x64
CPU
Intel I5-2500K @3.3GHz
Motherboard
Asrock P67 Extreme4
Memory
16GB G.Skill Ripjaws X (4x4GB)
Graphics Card(s)
EVGA GeForce 750 Ti SC 2GB
Sound Card
ASUS Xonar DG 5.1 Channels 24-bit 96KHz PCI Interface Sound
Monitor(s) Displays
auria eq2367
Screen Resolution
1920 x 1080
Hard Drives
250GB Samsung 850 EVO SSD
1TB WD Blue
1TB Hitachi
PSU
SeaSonic X 650W 80 Plus Gold
Case
Corsair Obsidian 750D
Cooling
Corsair H60, Three 140mm case fans
Keyboard
Logitech Wireless Keyboard K520
Mouse
Logitech Wireless Mouse M310
Internet Speed
Wave Broadband ~ 100 dn 5 up
Antivirus
Windows Defender, Malwarebytes Premium
Browser
Edge, IE11, Chrome
Other Info
Laptop specs: HP g7-1365dx /
CPU: AMD A6-3420M APU with Radeon(tm) HD Graphics /
RAM: Crucial 8Gb (2x4Gb) /
SSD: Crucial M4-CT128M4SSD2 ATA Device/ FW 000F /
GFX: AMD Radeon HD 6520G /
OS: Windows 10 Pro x64

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 10 Pro x64, Arch Linux
CPU
Intel Core 2 Quad Q8200 OC'd 3.08GHz
Motherboard
Asus Rampage formula LGA775
Memory
8GB DDR2 900Mhz
Graphics Card(s)
MSI GT730 2GB GDDR5 (Kepler)
Sound Card
Supreme FX2
Monitor(s) Displays
Samsung LS22F350 LED
Screen Resolution
1080P
Hard Drives
Kingston SSDNow UV400 120GB, 500GB Hitachi, 2TB Samsung, 500GB Seagate FreeAgent, 640GB Samsung, 160GB Toshiba (Arch)
PSU
AeroCool 500W Bronze
Cooling
Cooler Master V6 + 3X fans
Keyboard
Prolink keyboard
Mouse
Logitech M705
Internet Speed
1MiB/s
Browser
Chrome Beta

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz (Gateway computer)
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz
Motherboard
Gateway IPISB-VR
Memory
8.00 GB
Graphics Card(s)
Intel(R) HD Graphics
Sound Card
(1) Realtek High Definition Audio (2) Intel(R) Display Aud
Monitor(s) Displays
ViewSonic 2250 Series
Screen Resolution
1920 x 1080 x 32 bits (4294967296 colors) @ 60 Hz
Hard Drives
(1) WDC WD10EADX-22TDHB0 (2) Generic Mini SD Reader USB Device (3) Generic USB CF Reader USB Device (4) Generic USB MS Reader USB Device (5) Generic USB SD Reader USB Device (6) Generic USB xD/SM Reader USB Device (7) Seagate FreeAgent Go
Keyboard
Gateway
Mouse
Logitech
Internet Speed
20 Mbps (Theoretical.)
Antivirus
Avast
Browser
Firefox
I was having all sorts of trouble with firefox, and switched to google chrome, but got tired of the tabs at the very top of chrome interfering with the toolbar across the top of Windows 7 and went back to firefox... but the constant not responding, lockups, hesitations from firefox was irritating... so I found this thread... and firefox was about to crash on this very thread topic, then I finally got a message from firefox an error dialog box, saying that it might be the Bing toolbar. I disabled it and have had no problems for the past couple of hours with firefox. Imagine that if it is the case... MS's BING toolbar crashing my firefox... give it a try if you use the BING toolbar. It might alleviate some problems for you.
 

My Computer

Computer Manufacturer/Model Number
Dell Laptop Studio 15
OS
WIndows 7 Premium 64bit
CPU
Intel(R) Core(TM) i7 CPU Q 720 @ 1.6 Ghz
Motherboard
Dell
Memory
4GB
Graphics Card(s)
ATI Mobility Radeon HD 5400 Series
Sound Card
On Board
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