browser cache empty action is not executed in some browsers

[BrainPill]

Hi all

I have an uncommon problem I cant really solve . 

I have a script that uses require and calls for a new php script.

If I comment the line and check what happens in the browser then I have different results .

Chrome and Edge: nothing happens, the old require routine is executed; even after clearing browser cache in Chrome.

In the Brave Browser is the commented require line not executed and is shown nothing in the browser.

 

Does this mean that there is also a server cache and should I empty it? If so then how should it be made empty?

 

[Ingolme]

How are you commenting the line? If it is with an HTML comment that may be the cause for different browsers interpreting it differently.