I'm trying to install a specific version of Firefox (52.8) on Centos 6.9. I've used "yumdownload --resolve firefox...x86_64". It created a folder the firefox rpm as well as 5 or six other dependencies. These included nspr-4.19 and several nss-3.6 rpms.
When I tried to install it on another system (using rpm -ivh firefox..x86-64.rpm), it had a dependency conflict with existing nspr (a lower version). When I tried to uninstall the existing version, it said it would delete a bunch of important modules.
What's the best solution? Should I try to do an rpm update on the underlying modules? If so, do I specify the older one or the newer one?