The download link on the Firefox Developer Edition page just downloads a .tar.bz2 file.
Have tried the following methods:
sudo add-apt-repository ppa:ubuntu-desktop/ubuntu-make sudo apt-get update sudo apt-get install ubuntu-make umake web firefox-dev
This gave me:
ERROR: Download page changed its syntax or is not parsable
sudo apt install firefox-dev
The command ran but i could not find any instance of firefox developer edition in application launcher search. I ended up using
sudo apt remove later.
sudo add-apt-repository ppa:ubuntu-mozilla-daily/firefox-aurora, I got the error:
sudo: add-apt-repository: command not found
I also tried to install it manually from the .tar.bz2 file, but it was confusing as there are no elementary-specific instructions on the web.