To follow up on Michael Kaply's comment (#3), using the firefox snap one can install Firefox from the beta channel, nightly, ESR, or even all of them in parallel. See https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1515125/comments/3 for details.
To follow up on Michael Kaply's comment (#3), using the firefox snap one can install Firefox from the beta channel, nightly, ESR, or even all of them in parallel. See https:/ /bugs.launchpad .net/ubuntu/ +source/ firefox/ +bug/1515125/ comments/ 3 for details.