iceweasel-gnome-keyring software package provides virtual package provided by xul-ext-gnome-keyring, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install iceweasel-gnome-keyring
iceweasel-gnome-keyring is installed in your system.
Make ensure the iceweasel-gnome-keyring package were installed using the commands given below,
$ sudo dpkg-query -l | grep iceweasel-gnome-keyring*
You will get with iceweasel-gnome-keyring package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Virtual packages |
| Package | iceweasel-gnome-keyring |
| Version | |
| Description | virtual package provided by xul-ext-gnome-keyring |
| Sub Section | virtual |