Google has officially released Google Toolbar 5 for Firefox, this version was available for Internet Explorer since last December, nevertheless Google has been slowing down development on several Firefox extensions and even scrapped the ever so useful Google Browser Sync early this year.
This version has several features that were introduced in the version for IE, including a enhanced Autofill where you can create multiple form fill profiles. This feature is definitely useful if you want to create separate delivery addresses for home and office.
In addition to that, they have also introduced gadgets which will help you add your favorite websites to the toolbar, for example you can use the YouTube gadget to view and search for videos, without having to leave the current webpage. You can find 100s of gadgets for the toolbar in the gadget gallery.