The User Browser administration interface is nice and simple, but when you have 370 users it is sometimes hard to find people.

Suggestion 1:

Allow sorting on the headlines, e.g. sort on Full Name or email

Suggestion 2:

Search on more fields than just email, such as full name and user name

Suggestion 3:

Instead of splitting the result into pages 1, 2, 3, 4 split by characters in the alphabet, e.g. A B C D E. You don't need to go fancy and do A-F, G-I etc, it would be enough just to choose the first letter.

PS The Jira user admin interface is a LOT better than the Confluence admin interface, it's very confusing with the required wildcard characters. Well done Jira!

PPS I guess the "Users Per Page: All" option was designed to avoid the above suggestions