Google Reader is an RSS (Really Simple Syndication) service that posts page updates, or "feeds," via the RSS or Atom standards.

Beginning June 1, Google Reader users running a slew of older browser -- including IE6; Firefox 1 and 2; Safari 2 and 3; and Chrome 1, 2. and 3 -- will see notifications urging them to upgrade to a newer edition.

"Reader is a cutting edge Web application, and this will allow us to spend our time improving Reader instead of fixing issues with antiquated browsers," said Mihai Parparita, an engineer with the Reader team, in a last Monday.

Elsewhere on Google's site, the search giant to users still running IE6 and other outdated browsers.

"New features may not be available in your browser, and some features may even stop working," the company said. "Google Reader is available 'as is' for older browsers, and Google isn't able to respond to any feature requests or fix many bugs on those browsers."