Update readme

README.md

@@ -56,7 +56,7 @@ If you like this addon, please consider donating: [paypal.me/lartsch](https://pa
 4. Check out the other settings (optional)
 5. Click the "Submit" button to save
 
-If you have set your home instance correctly, you can now interact on other Mastodon instances.
+If you have set your home instance correctly, you can now interact on other Mastodon instances. If FediAct is running, a small box will be displayed in the bottom right corner. Also, it is indicated while content is resolving / could not be resolved.
 
 ### Options explained