I don't think Firefox will re-add built-in RSS support after removing it in 2018 (https://support.mozilla.org/en-US/kb/live-bookmarks https://support.mozilla.or

I don't think Firefox will re-add built-in RSS support after removing it in 2018 (https://support.mozilla.org/en-US/kb/live-bookmarks https://support.mozilla.org/en-US/kb/live-bookmarks), but the replacement addon whose development spun out of that deprecation is quite good. https://addons.mozilla.org/en-US/firefox/addon/livemarks/ https://addons.mozilla.org/en-US/firefox/addon/livemarks/ For Feedly users I also recommend this addon: https://addons.mozilla.org/en-US/firefox/addon/feedly-notifier/ https://addons.mozilla.org/en-US/firefox/addon/feedly-notifi... It can be opened as a sidebar turning my browser into my feed reader.