
With your browser open when surfing:-
Or from your desktop screen:-


Note: Make sure you select Scripting - Active scripting. This will disable Javascript when surfing the Internet, but Javascript will still work off-line (i.e. when using your computer locally). It is not necessary to Reboot your computer for this to take effect, and can be Re-Enabled at any time, even while you are surfing. Some sites rely on Javascript, so you may notice that these sites don't work correctly or display differently.
This is very easy to do in this browser.
To reverse this procedure, go back into Firefox and tick "Enable Javascript". You don't need to reboot for this to take effect, and you can do this while you're surfing.
This is even easier to do.
To reverse this procedure, return and tick "Enable Javascript". No need to reboot.