Mozilla Firefox is still the web browser with the most plug-ins and extensions to choose from. Today I will show in my opinion one of the most useful ones.
The United States with its 300 million people is in many ways still the most powerful country in the world. Find out if you are familiar with its facts and at the same time build up your general knowledge profile.
The good folks at the Delft University of Technology came up with a dragonfly-like winged machine that can fly completely autonomously until the batteries allow.
