FireFox Extensions worth installing

For me, the jury's still out regarding FireFox replacing IE. Here's some add-ons that are sure to help the transition:

IE View 0.82
Adds "View page in Internet Explorer" links to the content and link context menu. Handy for previewing pages in IE, loading up IE-only pages when you run across them in Mozilla, etc. - This saves you from the hassle having to open IE and navigating to the page that's giving Firefox issues.

Googlebar 0.9.0.29
An unofficial Google toolbar for Firefox. - Way more (useful) features than the official IE-only version.. the only complaint is that it takes up it's own toolbar. I like to keep my toolbars small, and in IE I combine the navigation buttons, Google Toolbar, and the File menu all on one line with the address bar and links right below, on thier own bar. Small and sleek. But with all of the features (university search, computer search, and many more searching options) I am willing to put up with this drawback.

Image Zoom 0.1.7
Adds zoom functionality for images - Can you live without this?

Autofill 0.2
Autofill is a semi-faithful recreation of Google's IE Autofill function in Mozilla Firefox (with some additional features). - This is nice. Multiple profiles, more feilds, etc make this worthwhile (and better than the official Autofill).

BlogThis 0.2.1
Adds right-click access to Blogger's BlogThis popup. - For those not using the Googlebar, this is a necessary extension. Even if you are using Googlebar, this is a worthy feature that allows you to Blog a link without needing to visit the site.

Copy Plain Text 0.2
Copies text without formatting - see the Image Zoom response.

LastTab 1.0.4
Modifies CTRL-TAB to switch to recently selected tabs; CTRL-SHIFT-TAB moves in the opposite direction. - A great time saver. Just like Alt-Tab in Windows, except for your FireFox tabs. I can't tell you how many times I hit Alt-Tab without thinking, just to get annoyed that I have to use the mouse to change tabs.