Apologies if there are commands for this and I've missed them. These are particularly
useful in lists of chat messages modeled as <ul/> elements, tables, etc.
Sometimes I want to quickly jump to the beginning or end of a list to
trigger scrolling, or I'd like to jump to an element immediately before
or after a table but the element itself isn't a header or anything with
a quick nav key. I find myself regularly missing this functionality in
ChromeVox when I'm using ChromeOS.

With Orca and NVDA, "," goes to the end of a container while
"<" goes to its beginning.