Of course, not everyone wants to read RSS feeds with the browser. The main problem with reading RSS feeds with Firefox is that you get to see only the headline, rather than any actual text. This is where a dedicated RSS reader comes in handy, and Liferea is one of the best.
It is not installed by default, but Liferea is available from the repositories under the name liferea. After it is installed, you can find it in the menu at Applications, Internet, Liferea. By default, Liferea offers a number of RSS feeds, including Planet Debian, Groklaw, and Slashdot. Adding a new feed is straightforward. You select New Subscription under the Feeds menu and paste the URL of the RSS feed into the box. Liferea then retrieves all the
current items available through that field and displays the feed name on the left side for you to select and start reading.
To install Liferea-RSS on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:
sudo apt-get install liferea