Show Available Version
In the list of applications you should add a column "Available Version" where you show the version number of available updates.
For Firefox the available version would be 60.0.1 while the installed version is 59.0.3.
If an application is Up-To-Date, then display "Up-To-Date" instead of a version number in the column "Available Version".
Secunia includes both an Installed version number and (if different), a Secure version number of each program. The latter is useful for when I need to find the update myself.
Suggested by @HempOil