update readme

README.md

@@ -1,11 +1,12 @@
 # rsspreview
 
-Firefox has removed support for RSS in versions 64+.
-
-This includes the feed preview feature that was quite useful for some people.
+Firefox has removed support for RSS in versions 64+, including the useful preview feature.
 
 This extension attempts to recreate it.
 
 Download at: https://addons.mozilla.org/en-US/firefox/addon/rsspreview/
 
-From version 3.0 on, feed detection on web pages is available, but disabled by default. It can be enable in the addon options and it will add an rss icon in the address bar on pages that declares an rss or atom feed.
+Additional features:
+* feed detection and address bar button
+* detect feeds from itunes podcast pages
+* custom css support