0
POPSFlash Switcher This GREAT extension lets you run any version of the flash player in Firefox.
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POPSTamper Data Another essential for web developers. This bad boy lets you inspect all HTTP traffic in FF, as well as modify it before it gets sent to the server. I *believe* you can even create server call (GET, POST, etc) but I'm not sure... Haven't had to do that for a long time. =)
3
POPSAdd N Edit Cookies This will allow you to add/edit/delete cookies. I use it all of the time to set a test cookie that I'll use in code for a short time to try something out. No more creating a page to create the cookie (or as I used to do, a page that would let you set/edit cookies for the domain you were on.)
2
POPSColorZilla An essential web developer tool, this thing lets you grab colors from anywhere (including flash) and will automaticaly put the hex (w/ or w/o #) or RGB values on your clipboard. It's great!
2
POPSCustomize Google A great extension that adds links to many of the google services to other similar services provided by 3rd parties. In the off chance you couldn't find it on Google, you'll be able to access a number of alternative sites to try to find what you're looking for. And if you're on Froogle, then you can quickly jump to other comparison sites to truly search for the best value.
0
POPSAll-in-One Sidebar This used to be an essential for web developers, but FireBug has pretty much handles all of the web development needs I had from AIOS. But I still like to use it to browse extensions, history, etc...
1
POPSIE Tab This extension allows you to view any page inside Firefox using the Internet Explorer rendering engine (embedded IE.) It's very handy (single click switches from IE to FF) and it can keep a list of sites to always use the IE engine on (eg, windowsupdate.microsoft.com)
2
POPSFirebug This is the single most important extension for web developers to have in FireFox.
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