As a system administrator, what Firefox plugin helps you do your job?

Question

I know that there are several Firefox plugins that are invaluable for development. What plugins exist that are useful for system administration, monitoring, and the like? What plugins make your day-to-day job as a system or network administrator easier?

I'm not sure if this question is on the CW border or not. I'll check in an hour or so to see if there's a balance of comments in either direction on whether this should be CW or not.
Voting for close... if I could. "What is your favorite cheese sandwich... as a system administrator." Honestly. Can't wait until we get a good group of 3k+ editors.
@Adam Davis, did you wake up on the wrong side of the bed that day? Asking "what tool do you use to do your job" is different from asking "what do you eat at your job." I updated the title to make it more clear, but this is directly related to doing sysadmin tasks. The answers below directly relate to doing sysadmin tasks. This is not a "how do you decorate your cube" question.
It took five days for two people to chime in and say, "Yes this should be CW," which doesn't indicate a strong preference. Still, given two such opinions, I have changed this to be CW.

Quog · Answer 1 · 2009-05-02 04:01:52Z

ShowIP - allows me to see quickly the IP address of the server where a particular website is hosted. Assists in managing my many clients websites.

DNSCache - quickly disable/re-enable Firefox's builtin DNS Cache, particularly good if your also manipulating the site's DNS at the time

ScreenGrab - particularly good at capturing that error and sending to the developers.

Shard · Answer 2 · 2009-05-02 01:38:08Z

up vote 15 down vote

Foxyproxy - I cant stand getting attacked by others when they walk over with their stats and say "Hm this Serverfault.com you wasted 5 minutes of our time on it."

answered May 2 '09 at 1:38

Shard
1,09021328

	Wish I could upvote this more. – Portman May 2 '09 at 2:36
	this looks more like a tool that would give sysadmins work to do! Maybe give it to all the end users as a ploy to get better funding for network security projects? – Nick Kavadias May 31 '09 at 18:12

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WaldenL · Answer 3 · 2009-05-02 04:19:58Z

up vote 9 down vote

Even for IT, I'd have to put FireBug at the top of the list, too much good information in there.and

answered May 2 '09 at 4:19

WaldenL
893620

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mryan1 · Answer 4 · 2009-05-07 18:56:13Z

Tamper Data this is handy when you have to examine HTTP headers. This may be necessary if you have virtual hosts in a hosting environment. We also insert a field in the header to identify web machines in some of our web farms to identify problem hosts.

Omar Shahine · Answer 5 · 2009-05-02 02:00:27Z

up vote 6 down vote

Xmarks, cause who wants to maintain a local only copy of their Firefox bookmarks. Xmarks will sync your bookmarks across Firefox, IE etc on all your computers. It's fast and stays out of the way.

answered May 2 '09 at 2:00

Omar Shahine
2,08431222

1

Now when will it sync my Chrome bookmarks? :( – Christopher Galpin May 2 '09 at 2:33

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UndertheFold · Answer 6 · 2009-05-03 05:40:19Z

up vote 4 down vote

WebMail Notifier - Tracks web email accounts

Live http headers - great for trouble shooting websites

Ghostery watch the websites that watch you

answered May 3 '09 at 5:40

UndertheFold
1,845715

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Adam Gibbins · Answer 7 · 2009-05-07 19:59:38Z

up vote 4 down vote

Delicious Bookmarks to sync my bookmarks across machines.

answered May 7 '09 at 19:59

community wiki

Adam Gibbins

Yes! Yes! Yes! It's like a catch-all of all the useful content I've come across, tagged and sorted. – spoulson May 7 '09 at 20:01

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Ivan · Answer 8 · 2009-05-02 03:48:39Z

up vote 3 down vote

LastPass. So I don't have to remember the loads of accounts I use (and can generate very strong passwords for each of your accounts), both personal and at work.

answered May 2 '09 at 3:48

Ivan
2,301718

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xkcd150 · Answer 9 · 2009-05-02 04:15:34Z

up vote 3 down vote

If you're using amazon ec2; elasticfox

answered May 2 '09 at 4:15

xkcd150
47339

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jwiz · Answer 10 · 2009-05-31 18:14:37Z

up vote 3 down vote

Nagios Checker is pretty nice.

answered May 31 '09 at 18:14

community wiki

jwiz

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Dave Cheney · Answer 11 · 2009-05-03 05:00:06Z

up vote 2 down vote

Firebug and YSlow! FTW

However I don't see why a web browser is a crucial tool for sysadmins, curl ? wget ? telnet host 80 ?

answered May 3 '09 at 5:00

Dave Cheney
10.2k1945

I admin vmware server 2.x. If I don't run a website, I've got to use the 1500 character-long command lines. – Matt Simmons May 31 '09 at 18:12

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Milner · Answer 12 · 2009-05-07 18:35:38Z

ReloadEvery - so I can get SO refresh automagically while working!

AdBlockPlus - because so many sites have ads that I don't care about.

Mentioned before, but super +1 for Firebug and YSlow because there's typically some good information that can be gleaned depending on what issue you might get roped in to.