custom-tab-width software package provides virtual package provided by xul-ext-custom-tab-width, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install custom-tab-width
custom-tab-width is installed in your system.
Make ensure the custom-tab-width package were installed using the commands given below,
$ sudo dpkg-query -l | grep custom-tab-width*
You will get with custom-tab-width package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Virtual packages |
| Package | custom-tab-width |
| Version | |
| Description | virtual package provided by xul-ext-custom-tab-width |
| Sub Section | virtual |