It is difficult to find something from just the package name. For example, if you need an email reader, you may not know that "alpine" will do what you need.
Currently, appbrowser simply lists the extensions by name. It would help you if there was an option to list them by category, and you could browse the categories. The web browser entry would have firefox, opera, minefield, etc. listed together.
@developers:
Is it possible to have two tabs under "Extensions" where one is the list as it exists now and the other is a tree control with a categorical hierarchy? The actual categorization of the list would be a tedious task, but we could probably get that info from another distro.