When a news reader widget is shown in a dashboard, the RSS feed with which it is configured is rendered in accordance with its settings.
An Open post in browser button is displayed to the bottom right when hovering over a news feed post:
Clicking it displays the full post contents in your default browser. Double-clicking the post has the same effect.
If a News feed URL has not been specified, a message is displayed. If an invalid News feed URL has been specified, a ‘Failed to load the news feed’ message is shown.