Firefox plugins
 

Cooliris was pointed out in another thread. But I found it to be too intrusive.

However, I do find these two useful:

Google Browser Sync - keeps my work and home bookmarks in sync. There are other synchronizer plugins out there, but I already had the google id from having gmail.

IE Tab - There are some sites that are strictly tailored for Internet Explorer. But I prefer Firefox in all other things. This plugin uses the IE component to embed an ie browser in your Firefox tab. Means I don't ever have to use IE now.

Any other useful ones out there?

Ad Block Plus and Accuweather

2nded Bullitt.

The flash block thingie?

FoxyTunes

Batch Download

Duplicate Tab

Gmail Space

Image Toolbar

Pop-Up Master

Snap Links

Unhide Passwords

Adblock Plus is awesome.

FireFTP is another good one.

I mentioned Flashblock in another thread. I don't block all ads but I do block Flash and selectively let it through on places like YouTube.

ShowIP
Web Developer
Total Validator
MeasureIt
LinkChecker
Colorzilla

I've used these from various troubleshooting and web design activities.

I also use

Download Statusbar - put download status in your status bar where it belongs.

ChromaTabs: color your tabs according to what site they're on. All my Cellar tags are red, all my Gmail tags are blue, etc. makes it easy to remember where you are.

Gmail Notifier: number of unread Gmail msgs in your status bar.

I can spend hours using StumbleUpon.

These are the ones I use:

NoScript
AdBlock Plus
IETab
ChatZilla
FoxyTunes
Gmail S/MIME
VideoDownloader
Verisign EV Green Bar Extension

There's more that I have used in the past (CustomizeGoogle), but I don't because of issues.

Adblock Plus
del.icio.us
DownThemAll!
Faster Fox
Forecast Fox
Google Notebook
IE tab

Download Statusbar
DownThemAll!
Flashblock
Gmail Notifier
GreaseMonkey (There's a Greasemonkey script that makes linked Flickr pics in bbcode)
ImageZoom
Tab Mix Plus

Even before going to FF, I had accumulated a setup that keeps my machine sparkling clean...

Zone Alarm as a firewall - Free
AVG Antivirus - Free
Pestpatrol - I paid for it once

I ran a full scan w/Pest Patrol followed by an Adaware scan, and came up w/nothing but a few cookies...this after about five months of daily hard use. I'm happy.

I run AVG and ZA, along with Spyboy S&D, and in 2 years I have had no problems.

Another useful plugin - Drag and drop upload for gmail.

https://addons.mozilla.org/en-US/firefox/addon/2190

Mouse Gestures Redox

I especially like being able to keep my hand on the mouse and navigate/control the browser. By far, the most frequently used gesture is Back, which is defined as a RtClick-LeftMove. That sounds more complicated than it is, really.

All of the gestures need a right click and some motion, usually defined by a clock direction, so the one described above would be listed as L9. Easy peasy!

Mine vary at different times: Here's what I've got now...

Adblock Filter.G Updater
Adblock Plus
Adblock Plus: Element Hiding Helper
Better Youtube
BugMeNot
Closy
Download Statusbar
Duplicate Tab
FireFTP
Gmail Manager
Greasemonkey
Nuke Anything Enhanced
Quick Restart
Simple RSS Reader
Tab Clicking Options
URL Fixer

AdBlock Plus
BBCodeXtra
BugMeNot
Clear Cache Button
CoLT (copies not just links but also their text, and does it in HTML, BBedit and Wikicode)
CookieSafe
Download Statusbar
DownloadHelper (lifts nearly any video from nearly any site and converts Flash videos to other formats)
Email This!
Flagfox (displays the flag of the country hosting the current web site)
Forecastfox
Google Gears
Greasemonkey
Novell Moonlight (open-source implementation of MS Silverlight, run on Linux, not sure about others)
Print/Print Preview (lets me use the Mozilla Suite's print/preview button)
RUWT? toolbar (got scores?)
ScribeFire
Text Formatting Toolbar (gives me a button bar with formatting commands for places like this)
TinyURL Creator
US Department of Homeland Insecurity Idiocy Level

Would that be why some sites flicker badly in Firefox? I have been trying it out on my new comp. Everything is fine except sometimes the browser screen flickers up and down.