It is all very clear that Firefox 4.0 will be leaning heavily on the UI changes to make web browsing fun and easy for the users. Revamping the UI seems to involve animations as well. Stephen Horlander released two videos depicting the New Tab animation and the visually appealing Tab Tear Off.

New Tab animation:

Look at the video below and see how the Firefox 4.0 is going to animate the new tab creation. How it will be ergonomically helpful is yet not known.

Tab Tear Off animation:

Even tab arrangement and detaching a tab from the window is being made visually appealing, with a small ‘+’ on the top-right to attach it back to the window.

Don’t forget to read our related post: How to install the Firefox 4.0 mock up theme