$ sudo apt-get remove firefox-sage

Uninstall firefox-sage including dependent package

If you would like to remove firefox-sage and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove firefox-sage

Use Purging firefox-sage

If you use with purge options to firefox-sage package all the configuration and dependent packages will be removed.

$ sudo apt-get purge firefox-sage

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove firefox-sage

See Also,