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Firefox now features a share button.

Mozilla updated Firefox for desktops and Android on Tuesday with new features aimed at giving both versions of the browser a bit more pop.

Firefox for Windows, Mac, and Linux now offers a Share button. The icon looks like a paper airplane and allows people to share the Web site they're on with several services, including Facebook. It leverages the recent Social API to bring a bit of a mobile browser feature to desktops.

The browser also now comes with mixed content blocking. This means that on sites that serve both secure and insecure content, page elements that are served over standard HTTP will be blocked by default. Page elements that arrive over HTTPS will be allowed through.

The change, though small, is expected to cut down on "man-in-the-middle" attacks by preventing potentially malicious content, often added to the page by third parties, from loading.

Mozilla hopes that the Social API will get used to share everything from social network status updates to finance and to-do lists.