Mozilla finally released the 4.0 version of its well-known open source browser Firefox.
Firefox 4 features a new, lighter look, is some six times faster than its predecessor, has lower startup and page load times, and brings goodies like Firefox Sync (for syncing browsing history, bookmaks, tabs across multiple devices), App Tabs, Switch to Tab, an updated Add-ons manager, the Do Not Track function, HSTS (HTTP Strict Transport Security), CSP (Content Security Policy), WebM support, and more.
Firefox 4 is available in over 80 languages and can used on Windows, Mac OS X and Linux systems.
Some of the new security features in this version of Firefox 4.0:
Instant Web Site ID: Gives users an icon to verify a sites’ legitimacy.
Content Security Policy: Designed to shut down cross-site scripting attacks by providing a mechanism for sites to explicitly tell the browser which content is legitimate.
Secure Updates: Looks for a secure connection before Firefox installs or updates add-ons and third-party software.
Anti-Malware: Warns you away from a site which it detects as hosting malicious content.
Do Not Track: Allows you to transmit a “Do Not Track HTTP” header to websites, opting you out of behavioral tracking.