This RSS reader does exactly what I was looking for. It's something I'm seeing daily use out of, now, to catch what's new on various sites quickly and easily. It's a big help!
It gives a display of every feed all at once on one page, and just the feed titles - exactly what I wanted in a RSS reader.
Although you can also set it up with different pages (basically different tabs), I'm using just one.
I'd like if it had the option to go directly to its feed from the mPage button, rather than through an entry in the button's menu. (I'm using another addon for a button to directly open mPage with one click.)
Its sync feature works well, just one of the ways to add feeds to it. You can bookmark feeds in a folder, and set mPage to sync with that. Then, when I refresh mPage, they show up.
It's easy to drag and drop the feeds to change their order or what column ("panel") they're in. (You can change how many columns there are, too, from 2 to 7.)
The colors and fonts can be customized. You can turn off the display of the favicons.
Each feed has its own setting for changing its title, and how many entries are shown under the feed. (3 on one, 5 on another, etc.)
Mine now looks quite different from the screenshots.
I am not sure if it only updates when I reload the page, but if so that is perfect for my use - daily or occasional checks of updates to different feeds.