How To Install the Firefox Developer Edition in Linux Ubuntu 14.10, Ubuntu 14.04 & Others

Method 1

• Install Firefox Developer Edition, formerly know as Aurora by running the following commands:
  
sudo add-apt-repository ppa:ubuntu-mozilla-daily/firefox-aurora
sudo apt-get update
sudo apt-get install firefox

  Ubuntu versions supported: Utopic (14.10), Trusty (14.04), Precise (12.04).

Note that this method will replace your current Firefox installation.

Method 2

• Download the firefox developer edition here:
  https://www.mozilla.org/en-US/firefox/developer/
• Extract the file manually to /opt/firefox/
• Open Nautilus: Go to Edit->Preferences-> Behavior-> click on “Run executable text files when they are opened”
• Go to the file ‘firefox’ in /opt/firefox/
• Right click and select Properties–> Permissions–> Execute: Allow executing file as a program.
• Open terminal and type:
• 'gnome-desktop-item-edit' not installed in your computer then you want to run following command
  

sudo apt-get install gnome-panel

then run following command

gnome-desktop-item-edit ~/.local/share/applications --create-newCreate a shortcut and it’s done.