Mozilla Firefox Script not responding when using Flash Player

Panda4cash

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So this problem just occured lately when i launched up Firefox. I get a script on responding error message when i play a video (Which requires flash) i tried reinstalling firefox with a fresh new one, disabling any sort of virus protection, starting firefox in safe mode which disables all plugins, downgrading adobe flash, upgrading adobe flash. When i uninstall flash completely, youtube and other flash websites respond with no script error but i need flash to play the videos.
 

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Here is the error when visiting a video on YouTube
 

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  • Script not responding.PNG
    Script not responding.PNG
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My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Gigabyte
OS
Windows 7 Ultimate 64bit
CPU
AMD FX 6300 3.5GHz
Motherboard
Gigabyte GA-78LMT-USB3 (rev. 5.0)
Memory
12GB
Graphics Card(s)
GIGABYTE RADEON HD 6670
Monitor(s) Displays
1
Screen Resolution
1920x1080
Hard Drives
Western Digital 1TB 5400RPM
PSU
Thermaltake 600W
Case
Thermaltake commander MS-I
Cooling
120mm back fan and stock CPU cooler
Keyboard
Microsoft comfort desktop 5000
Mouse
Logitech G700 Wireless Gaming mouse
Internet Speed
15/5 Verizon FIOS
Antivirus
Microsoft Security Essentials
Browser
Google Chrome
what release of Flash are you using?
 

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Custom Build
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Intel Core i7 960 @3.20 GHz
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MSI MS7522
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24.0 GB DDR3
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EVGA GTX 750Ti
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LG E2341 23 Inch
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1TB Western Dgital 1002FAEX-00Y9A0
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700 Watt
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Haf 912
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Fans
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Logitech MK710
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AIS 2015 .10.0.2225
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Firefox 49
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MalwareBytes Anti-Rootkit utility
Here are some troubleshooting steps from Firefox

Warning Unresponsive script - What it means and how to fix it | Firefox Help

Try disabling hardware acceleration to rule it out

Forum Response - Disable hardware acceleration | Firefox Help

Always good to check plugins are up to date

https://www.mozilla.org/en-US/plugincheck/

A simple work around may be Noscript

NoScript - JavaScript/Java/Flash blocker for a safer Firefox experience! - what is it? - InformAction

Clearing cache and cookies for the offending sites is also a possibility.

Finally, a possibility to determine the error cause.

Unresponsive Script Warning - MozillaZine Knowledge Base

Last but not least, a reset

Reset Firefox

A Guy
 

My Computer

Computer type
PC/Desktop
OS
Windows 10 Home x64
CPU
INTEL Core i5-750 Quad-Core 3.37GHz
Motherboard
ASUS P7P55D
Memory
HyperX Fury Black Series 8GB (2 x 4GB) 1866Mhz
Graphics Card(s)
EVGA GeForce GTX 750 Superclocked 1GB 128-Bit GDDR5
Monitor(s) Displays
LG 32MA68HY 32" IPS
Screen Resolution
1920 x 1080
Hard Drives
Samsung 840 Evo 120GB, SEAGATE 500GB Barracuda® 7200.12, SATA 3 Gb/s, 7200 RPM, 16MB cache
PSU
ANTEC TruePower New TP-550, 80 PLUS, 550W
Case
ANTEC Three Hundred Illusion
Cooling
COOLER MASTER Hyper 212 Plus, 4 x 120mm 1 x 140mm Noctua's
Internet Speed
85 + Mbps
Antivirus
Avast
Browser
Vivaldi
Im using Flash player 11. As for the instructions A Guy sent me. All of those still won't work.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Gigabyte
OS
Windows 7 Ultimate 64bit
CPU
AMD FX 6300 3.5GHz
Motherboard
Gigabyte GA-78LMT-USB3 (rev. 5.0)
Memory
12GB
Graphics Card(s)
GIGABYTE RADEON HD 6670
Monitor(s) Displays
1
Screen Resolution
1920x1080
Hard Drives
Western Digital 1TB 5400RPM
PSU
Thermaltake 600W
Case
Thermaltake commander MS-I
Cooling
120mm back fan and stock CPU cooler
Keyboard
Microsoft comfort desktop 5000
Mouse
Logitech G700 Wireless Gaming mouse
Internet Speed
15/5 Verizon FIOS
Antivirus
Microsoft Security Essentials
Browser
Google Chrome
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