This is now possible using snapd's parallel installs feature¹:
$ sudo snap set system experimental.parallel-instances=true
$ sudo snap install firefox
$ sudo snap install firefox firefox_esr
$ sudo snap refresh firefox_esr --channel=esr/stable
$ sudo snap install firefox firefox_beta
$ sudo snap refresh firefox_beta --beta
$ sudo snap install firefox firefox_nightly
$ sudo snap refresh firefox_nightly --edge
$ snap run firefox
$ snap run firefox_esr
$ snap run firefox_beta
$ snap run firefox_nightly
¹ https://snapcraft.io/docs/parallel-installs
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to firefox in Ubuntu.
https://bugs.launchpad.net/bugs/1515125
Title:
Ability to install Firefox Developer Edition on Ubuntu together with
stable release
Status in firefox package in Ubuntu:
Won't Fix
Bug description:
At now users can install on Ubuntu only stable or developer edition of
Firefox (via PPA), because packages have same name. But most of users
must have two versions of Firefox - stable and aurora, for compare and
test features.
Please create Firefox Developer Edition package for Ubuntu that will
contain firefox deb package with Developer version of Firefox
(https://www.mozilla.org/ru/firefox/developer/ ) with another name,
for example "firefox-devel", with ability to install it together with
stable version of Firefox, and changed install folder location,
different that firefox stable version, for example /usr/lib/firefox-
devel
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1515125/+subscriptions
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