The most recent version of the free, open-source Web browser flares some visual modifications, together with Chrome-like tabs on the crown, and an Opera-like button to substitute the menu bar.

Firefox 4 now upholds Google's WebM HTML5 video format, controls plug-ins, such as Flash to a split course for better defense against crashes, and proposes faster JavaScript performance.

Firefox 4 also gears a fresh Extension system called JetPack, which makes coding Extensions simpler to build and exercise. The sub-9MB installer downloads quickly, and setup takes around half a minute on the dual-core
3.16-GHz machine with 4GB RAM.

The new browser also incorporates a feedback button and like, the Microsoft Office 2010, it lets the user to select happy and sad faces to report their experiences.

And that's not all for reporting data for toolbars, tabs, menus, and password; the management will send data to the Firefox team at Mozilla to assist them in developing the browser.

The address bar also presents a switch to tab choice when the user starts typing text from another page's URL or page title.

Another detail taking motivation from Opera is Firefox 4's merge of the Stop and Reload buttons, which links the two functions depending on, whether the user intends to load the page or not.