Here are some helpful Firefox add-ons recommended by Smartlab Software. We use these nearly every day in our web site development.
ff add-ons download status page speed session manager xtotal validator xweb dev xyslow colorzilla firebug fiddlerhook flash block image download measureit searchstatus xtab mix plus wot
=== developer ffox add-ons (necessary)
DOM inspector - necessary for some web developer features
colorzilla
firephp
font finder
- analyzes selected font
save images - saves all images on a web
page
web
developer
=== non developer (handy to have)
download status bar
session mgr
tab mix plus
=== developer ffox add-ons (optional)
fasterfox (disabled)
firebug
- obsolete
flashblock
html validator - available through web
developer
rainbow
total validator
- requires java
WOT (disabled)
=== obsolete
about:addons-memory
betterprivacy
calomel ssl validation - on hold
certificate patrol
CSSsir
disconnect
DNSSEC/TLSA validator
fasterfox
gridfox
JSoff
L-square
mailvelope
measureit
noscript
pagespeed
privacy badger
(disabled)
firefox plug-ins
-------------------
about:addons-memory d
better privacy d
calomel validation
certificate patrol d
colorzilla
CSSsir d
disconnect d
DNSSEC/TLSA validator d
download status bar
fiddlerhook
firebug
firephp
font
finder d
grid fox d
html validator
jsoff d
l-square d
measureit d
noscript d
page speed
save images
session
manager
tab mix plus
total validator
web developer
wot d
yslow d
chrome extensions
freshstart
google analytics
debugger d
https everywhere d
mailvelope d
mymail-crypt d
nofollow d
open seo stats d
tag assistant d
wot d
Flashblock
This add-on blocks all Flash, Shockwave, and Authorware content from loading. Placeholders are displayed
instead of Flash. To show the Flash, click on the placeholder and it will appear.
Flashblock saves a lot of browser load time and hides a lot of ads.
LinkChecker
Checks links on a web page. Colors the links green
if they are ok.
McAfee Site Advisor
Site advisor gives safety information whether a site has issues with it, such
as spyware downloads.
Session Manager
I use this one all the time. Session manager saves the previous ten
sessions which can be reinstated. It also can recover crashed
sessions.
ColorZilla
Point your cursor to a color on the screen and ColorZilla will tell
you the RGB and hex value of it.
Firebug
You can edit, debug, and monitor CSS, HTML, and JavaScript live in
any web page. Very helpful for debugging JavaScript.
Lynx Viewer Tool
View a web page as a search engine sees it. All images and other superfluous baggage are stripped out so
only text is shown.
Tab Mix Plus
Manages tabs such as duplication, closing, and more.
YSlow
Analyzes a web page for factors that contribute to slowing it down.