I use the Feedbro extension for Firefox, but grain of salt, I only just started using it a week ago. Not sure what features are good for Feed Readers, but this

I use the Feedbro extension for Firefox, but grain of salt, I only just started using it a week ago. Not sure what features are good for Feed Readers, but this one is great for my office computer. I don't really "need" it to carry over to my other devices like Inoreader can do.