The PgUp and PgDown buttons do not trigger scrolling of the management console and they should in Firefox on Linux (latest).
1. Go to page displaying a scrollbar
2. Ensure mouse pointer is in that section
3. Hit PgDn
Actual: No scrolling
High because this is a fundamental user interaction in the browser that does not work.
*** This bug has been marked as a duplicate of bug 1831305 ***