What is the analogue of RSS Feed Reader for Firefox?

Question

RSS

Good afternoon, advise an analogue of this Chrome extension for ff.
What exactly do you want - a similar interface, a button among extensions, a list of subscriptions and unread in a drop-down window, without opening a tab with feeds.
At one time I didn’t even return to ff because it’s convenient for me to read rss in this particular extension, now I use all of them, but ff is the main one and I want to transfer subscriptions.

Answer 1

Method without extensions:
1. Create a folder called RSS in the Bookmarks Toolbar (for example)
2. Remove all other bookmarks from there
3. Subscribe to RSS feeds using the Live Bookmarks function and save everything to the RSS folder
4. In Costomize mode, drag the Bookmarks Toolbar to extension panel