What browser extensions do you use?

[John Q. Public]

Just curious (I say that a lot, don't I?). I was using one of my browser extensions this morning and it got me wondering which ones - if any - other people use. They can be invaluable in some cases or they can be totally useless. What do you use?

Mine are mostly webmastering-type tools.

Firefox:

• Alexa Sparky
• Avast Web Rep
• Bandwidth Meter and Diagnostics
• DOM Inspector (told ya)
• Download Helper (handy for saving web videos)
• Firebug (and related)
• Foxy SEO Tool

Chrome

• Alexa Traffic Rank
• Avast Web Rep
• IP Address and Domain Information
• PHP Console
• Window Resizer

IE, Opera and Safari: none. I only use them occasionally.

[Brooke]

I had no idea I had so many. Could this be one reason my computer is slowing down a bit:

Firefox Extensions:

Adblock Plus
gTranslate
LastPass
Photobucket Uploader
Picnik
Print Edit
QucikFox Notes
Readnotify.com Plugin
Scrapbook
Speed Dial
Table2Clipboard
Website City + Country Info
Xmarks

Firefox Plugins:

1.0
Flip4Mac Windows Media Plug-in
Google Earth Plugin
iPhotophotocast
Java Plugin 2 NPAPI browsers
Microsoft Office Live Plugin
Picasa
Quicktime Plug-in
Shockwave Flash
Silverlight Plug-in
Unity Player