Extensions have now gone public with the newly released Safari 5.0.1. Here’s a list of seven extensions you should install right away. Also, be sure to read our previous list of 25 extensionsworth checking out.

AdBlock

Firefox users should recognize this popular extension. This one’s an offshoot of AdBlock for Chrome, which itself is an offshoot of AdBlock Plus, the original Firefox extension. AdBlock does what its name implies: block ads. I installed it just to block that obnoxiously huge banner ad on YouTube’s homepage. If you’re not the type to ever click on ads anyway, then why not cut down on the visual (and sometimes audible) clutter?

Type-To-Navigate

Type-To-Navigate is a mouse-hater’s dream. It lets you navigate links by simply typing the name of the link. So say I wanted to view the About page of a blog, I’d just type “about” and Type-To-Navigate will highlight the link and display an attractive popup of what I’d written (“about”). The only places where this extension doesn’t work are in text fields and when the link is attached to an image. However, it should find any text link with no problems. Another neat thing you can do with it is to press certain shortcuts while the link you’re searching for is highlighted. You can type ⌘G to find next, ⌘C to copy the URL, and ⌘I to send it to Instapaper.

Invisible Status Bar

Another neat extension from the developer of Type-To-Navigate, Invisible Status Bar gives you a Google Chrome-like status bar that pops up when hovering over links, and even tells you how big a file is when you’re hovering over a download link.

MouseGestures

This feature was originally pioneered by Opera back in 2001, and it’s kind of amazing that it’s taken this long to get it into Safari (at least officially). If you’re unaware, mouse gestures are where you hold down a button on the mouse (normally the right or middle button) and move the mouse to perform a gesture. Gestures can do things like go back a page, or reload. MouseGestures only offers four gestures right now: up, down, left, and right. Assignable actions run the gamut from going back a page to closing the active tab. Unfortunately, there are no customizable gestures like in Opera yet.

WOT (Web Of Trust)

Another popular Firefox extension, WOT offers better security when searching the web by ranking pages based on their content, with other WOT users providing the rankings. The green WOT symbol means the site is safe, and the red means it’s unsafe, with several degrees of safety in between. The only annoying thing about it is that it pops up a little indicator in the top left of the window whenever you visit a new site, but fortunately, it doesn’t popup when you visit a site you’ve already visited.

Gmail Counter

For those who don’t use anything other than Gmail’s web-based interface, this extension is rather useful. It adds a new toolbar icon that shows how many unread messages are in your inbox. Clicking on the icon also takes you to your inbox, so you can get rid of your Gmail bookmark, if you have one.

Reload Button

This one was made by the venerable, and über-critical, John Siracusa, to address his annoyance with the location of Safari’s reload button since version 4. It adds a reload button to the toolbar that’s freely movable, unlike the default reload button. There isn’t much else to say about it, unless you like Safari’s default reload button, in which case, what’s wrong with you?
You could install most of these from the Extensions Gallery, but I’ve elected to link directly to the developers websites, as Apple doesn’t have individual pages for extensions yet.
Have you been playing around with Safari extensions? What are your favorites so far?
Related GigaOM Pro Research (subscription required): What Does the Future Hold For Browsers?
By Alex Layne 
Via www.theappleblog.com