Trying to Tweak FirFox But its Not working OUT

Code:

Performance

Improving Firefox's performance is divided into parameters that can be inputted while running Firefox or otherwise modifying its configuration as intended by the developers, and advanced procedures that involve foreign programs or scripts.
Note: Listed options may only be available for the latest version of Firefox.

This section contains advanced Firefox options for performance tweaking. For additional information see these MozillaZine articles.
Change Performance settings

Firefox automatically uses settings based on the computer's hardware specifications [1].

Adjusting these settings can be done in Preferences or by changing the dom.ipc.processCount value to 1-8 and browser.preferences.defaultPerformanceSettings.enabled to false manually in about:config.

However you may want to manually adjust this setting to increase performance even further or decrease memory usage on low-end devices.

In this case the Content process limit for the current user has been increased to 4:

$ ps -e | grep 'Web Content'

13991 tty1     00:00:04 Web Content
14027 tty1     00:00:09 Web Content
14031 tty1     00:00:20 Web Content
14040 tty1     00:00:26 Web Content

Enable OpenGL Off-Main-Thread Compositing (OMTC)

Basic software OMTC is enabled by default.

To check if OpenGL OMTC is enabled, go to about:support and under the "Graphics" section look for "Compositing". If it reports "Basic", OpenGL OMTC is disabled; if it reports "OpenGL" it is enabled.

If OpenGL OMTC is disabled, you can force-enable it by going to about:config and enabling layers.acceleration.force-enabled. Restart Firefox for changes to take effect.
Note: If OpenGL OMTC is disabled for a specific hardware, it may be due to stability issues, high system resources consumption, driver bugs or a number of different variables, and so instead of speeding things up it might slow them down. Proceed with force-enabling it at your own risk, benchmark if you aren’t sure.

For more information on OMTC in Firefox read MozillaWiki:Platform/GFX/OffMainThreadCompositing.

Firefox/Tweaks - ArchWiki

Not all tweaks will work on all systems.

How a tweak works with your system is mainly up to a number of factors
such as hardware and software , system configuration, directx or opengl.
or even the web pages your testing them on.
There are no one-for-all tweaks.
The best way for tweaks is to decide exactly what you want then look for a tweak to do this .
even then it may fail, but knowing what you want to do makes it easier to search for tweaks
that might work.

thomaseg1 said:

Not all tweaks will work on all systems.

How a tweak works with your system is mainly up to a number of factors
such as hardware and software , system configuration, directx or opengl.
or even the web pages your testing them on.
There are no one-for-all tweaks.
The best way for tweaks is to decide exactly what you want then look for a tweak to do this .
even then it may fail, but knowing what you want to do makes it easier to search for tweaks
that might work.

@thomaseg1

Thank you Sir