CentOS

Ah! I didn't even know how to do that. Thanks. I will try that and get back to the thread.

The idea of downloading the source code, for me, and then trying to generate the appropriate build environment to work with creating a Custom Firefox## RPM wasn't quite feasible for me.

I did succeed in creating a Custom Firefox## (firefox52, for example) RPM, having it install into /opt/firefox52, and without too much issue.

With my environment, I didn't have the access that I required to obtain all of the appropriate tools. I also did not have the time required to learn it.

So, in the end, I downloaded already-compiled binaries of Firefox52, extracted them into my RPM build environment and built my own Custom FIrefox52 RPM after all.

I got the already-compiled binaries of Firefox from the following Url:- https://ftp.mozilla.org/pub/firefox/releases/52.6.0esr/ and then dove into the path= linux-x86_64/en-US/.

It worked for me anyway.