Why always i need to close Firefox.exe from task manager when visiting some websites?

Hello dear Mozilla team! I just defaced to the problem , when i'm trying to visit http://cyberprogrammers.net/ website from Firefox browser, its frozen and i need to close firefox.exe from task manager. <a href="http://cyberprogrammers.net/">Cyber Programmers</a> website is working perfect with other browsers, and i try to open it with my friends computer, with Firefox browser and i don't get any error like that, its not frozen. So please help me to understand the problem and solve it. I'm using Latest version of firefox, Windows 8.1. Thanks for your support!

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] is a troubleshooting mode that turns off some settings, disables most add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
*Click the menu button [[Image:New Fx Menu]], click Help [[Image:Help-29]] and select ''Restart with Add-ons Disabled''.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
* On Windows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
When the Firefox Safe Mode window appears, select "Start in Safe Mode".<br>
[[Image:Safe Mode Fx 15 - Win]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] article to find the cause.
''To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
When you figure out what's causing your issues, please let us know. It might help others with the same problem.

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