Facebook has just announced the launched of the Comments Box plugin for mobile. This means that websites can engage their readers on mobile devices, while users can comment on news regardless of what device they’re reading it on.

If your website already is using embedded the Facebook Comments Box, the plugin will automatically appear on the mobile web version of your website. Below is the official details form Facebook Developers:

The mobile version will automatically show up when a mobile device user agent is detected. You can turn this behavior off by setting the mobile parameter to false. Please note: the mobile version ignores the width parameter, and instead has a fluid width of 100% in order to resize well in portrait/landscape switching situations. You may need to adjust your CSS for your mobile site to take advantage of this behavior. If preferred, you can still control the width via a container element.

For more information head on over to the Facebook Developers Comments Docs Page.

Facebook Messenger debuted today in Apple’s App Store, offering iPhone & Google Android users a unified chat experience with the ability to chat in groups with contacts from not only your Facebook friends but also your those listed in their contacts lists.

This app marks the launch of Facebook’s integration of Beluga, that was acquired in March of this year that specialized in group texting.

Another first is that this is the Facebook’s first standalone app for mobile devices, aside from the main app for Facebook. Did we mention that it’s also free of charge!?!?!?

Check out the official Facebook Messenger press release.