$ sudo npm install angularfire2
$ sudo npm install -g angularfire2

If want to update the angularfire2 package execute the command as below,

$ sudo npm update angularfire2

Update package globally,

$ npm install -g angularfire2

Git clone:

$ sudo  git clone https://github.com/rektide/angularfire2.git

$ sudo  npm install -g ./angularfire2

angularfire2@5.0.0-rc.4 /usr/lib/node_modules/angularfire2

How to remove angularfire2 package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall angularfire2

Basic Information of angularfire2 NPM Package: