Install Firefox Browser on Ubuntu
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In this document, I instruct you to install Firefox on Linux Server (Ubuntu Server, ...)
Here are pictures Firefox running on Ubuntu Server 16:10:

Firstly, you run the following command to add ppa:mozillateam/firefox-next repository to your system.
sudo add-apt-repository ppa:mozillateam/ppa
Note: If you get error: "sudo: add-apt-repository: command not found", run the following commands:sudo apt-get install software-properties-common sudo add-apt-repository ppa:mozillateam/ppa
Then, run the following command to update the packages.
sudo apt-get update
Installing Firefox:
sudo apt-get install firefox


Its Done! You have finished installing Firefox.

You can run Firefox from Terminal with the command:
firefox # OR: /usr/bin/firefox