My Must-have Firefox Addons

As a IT guy, switching among different OS and migrating from systems to systems (e.g., my desktop and a few of my laptops) is not uncommon. Whenever this happens, the first thing I would make sure is the up-to-date Firefox is installed with the following must-have addons:

1. Del.icio.us Bookmarks: for online bookmarking service, sharing bookmark links with others or myself (so that i don't need to synchronize the bookmarks from 3, 4 computers I use).
2. GUtil: grants me instant access to various google services I'm using (i.e., gmail, reader, docs, calendar, blogger, album) with button click.
3. ScrapBook: great substitution for "save page as..." function, which allows you to capture (and capture certain parts), organize, comment and edit on interesting web pages. The only problem is that it's not an online thing, and you need to export/import among different systems you have.
4. Google Toolbar for Firefox: this is actually with Firefox package, but I remind you to click on the "G" icon with the downward arrow, you will find it's not only for googling (i.g., I need Webster for English words that doesn't recognize me).
5. Session Manager: resume the tabs I was reading last time after restarting Firefox.
6. FireFTP: for lazy guys.