RedHat has no magic Mozilla sauce, they simply ship Firefox ESR and upgrade it every year. You'll have the same breakage in the end, just yearly instead of monthly.
This happens all the time.
What a fiction indeed.
In other words, you don't need to switch to RHEL to use Firefox ESR. It's the same version you can install on any other distro or Windows.
RedHat has no magic Mozilla sauce, they simply ship Firefox ESR and upgrade it every year. You'll have the same breakage in the end, just yearly instead of monthly.