How to uninstall or remove iceweasel-downthemall software package from Debian 9 (Stretch)

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

$ sudo apt-get remove iceweasel-downthemall

Uninstall iceweasel-downthemall including dependent package

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

$ sudo apt-get remove --auto-remove iceweasel-downthemall

Use Purging iceweasel-downthemall

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

$ sudo apt-get purge iceweasel-downthemall

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 iceweasel-downthemall