Add sort options
Add a menu that will sort new rss items either by date, or by feed, by domain, or other options. Sorting by feed/domain would make it easier to see related items next to each other in the feed list. For example in the below screenshot, the "WSGF" and "Extensions" items are not all displayed next to each other, and it looks unorganized or messy.

Do you intend this to be used only with the Today/Recent view and/or by people who read or delete everything? I'm pretty sure you don't want to see several pages with all Extensions news of the last 30 days, do you?
Do you intend this to be used only with the Today/Recent view and/or by people who read or delete everything?
It can be useful to have this for all "views" including Today/All Items/Bookmarks, and folders containing multiple feeds.
I'm pretty sure you don't want to see several pages with all Extensions news of the last 30 days, do you?
As long as entries remain grouped together by the day (Yesterday/Sunday/Monday etc), we can still sort entries according to feed name, so it's easier to identify entries from the same source. If that makes sense.