The Process Portal is a web client where you can access process models, workflows, and so on at any time and from anywhere. The structure is quite similar to the FireStart Client. On the left side, you can choose the designer and after that, the scopes you are allowed to see are displayed. On the homepage. you'll find information about your FireStart interactions, such as your roles, your completed tasks, your new tasks, etc.
If you cannot find a process model, it's likely because the model you want to display is not published and therefore does not exist in the Process Portal. So don't forget to publish all models you want to have access to in the Process Portal, because only those will be displayed there.
A process can be started from the Process Portal as well. To do that, you need to model your process and publish it afterward. Then it is visible in the Startable Processes menu where you simply choose the process and start it.
There are several parameters which can be set in the init.json file to configure the Process Portal. This file can be found in path <FireStartInstallDir>\FireStart Resources\FireStart Process Portal. For more information on the parameters for the init.json file click here.
The Process Portal cannot be accessed anonymously, but an AD user is required.
For more detailed information, please have a look at the tutorial Invoice Verification, especially the topic Process Portal - Introduction.