Firefox 4

Firefox 4 was released two day ago.

The changes I like:

"Performance: Firefox is up to six times faster than the previous release."
(...)
"The JavaScript engine (..) for faster page-load speed and better performance of Web apps and games."

I really find start-up faster and also the javascript programs.

Private and Secure: Do Not Track: (...) allows users to opt-out of tracking used for behavioral advertising.
Firefox (..) fix(...) flaws in some Web standards to prevent others from accessing your browser history.
HTTP Strict Transport Security (HSTS): automatically establishes secure connections to stop “man in the middle” attacks and keep sensitive data safe from interception during the log-in process.
Content Security Policy (CSP): prevent cross-scripting attacks by allowing sites to explicitly tell the browser which content is legitimate.

The HSTS and CSP still needs some implementation in the webservers (upgrading,etc..) but I think that will happen very fast.

Some HTML5 support . It's still not a final standard but it's adoption is growing (some features more than others) and the features are already being used to great advantages.

And most visual/operational change: Tabs on Top! (you can change to the previous Tabs position if you like)

Now Opera, Chrome and Firefox looks very similar :-)

Changes I need some time to get use to:
Add-ons panel
Link Url information

It's my browser for choice!