How to uninstall or remove firefox-webdeveloper software package from Debian 9 (Stretch)

You can uninstall or removes an installed firefox-webdeveloper package itself from Debian 9 (Stretch) through the terminal,

$ sudo apt-get remove firefox-webdeveloper

Uninstall firefox-webdeveloper including dependent package

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

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

Use Purging firefox-webdeveloper

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

$ sudo apt-get purge firefox-webdeveloper

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-webdeveloper