The Firefox Extensions are the responses to several of your questions

-Do you need to make a backup from all your blogger blog images?
DownThemAll Firefox Extension




-Do you need to debug problems or spy the traffic between your browser and Internet?
LiveHttpHeaders Firefox Extension



-Are you working into a basement and you can't see the outside weather?
ForecastFox Firefox Extension



-Are you interested in find detailed information about a specific web site?
AboutThisSite Firefox Extension



-Do you need control the Internet Usage your kids are doing or control yourself and restrict how much time you're spending with Internet?
PageAddict Firefox Extension



-Do you want to avoid spam from testing different web utils o pages?
Temporary Inbox Firefox Extension



-Do you need to switch between different proxys in a easy way?
FoxyProxy Firefox Extension



-Do you want a fully customizable toolbar?
PrefBar Firefox Extension




-Are you a nagios user?
Nagios checker Firefox Extension



-Are you surfing between web pages with text links and you want convert it into the genuine clickable links?
Linkification Firefox Extension

BEFORE

AFTER


-Do you want to copy text from any webpage only selecting it with the mouse?.
AutoCopy Firefox Extension

Does it needed an image to show this feature? :)

-Do you want to manage the Internet Downloads directly with your browser with a tidy toolbar?
DownLoad StatusBar Firefox Extension




Take a detailed look to almost all of them.
More detalided extensions.




This post is based in a old post published some weeks ago selecting my favourite extensions firefox.