Alt-Text for Links – Displays the url of the link in a popup. I find this handy because I know ahead of time where the link is taking me.
Download Status bar – This extension keeps track of downloads and shows the information in the status bar.
Enhanced History Manager – This basically is an advanced history manager for Firefox.
Forcastfox – Shows weather information in the statusbar of your browser.
Greasemonkey – This is a very useful plugin that allows you to modify webpages on the fly using user scripts. They can add or edit elements of a page to make it more useful or less cluttered.
IE Tab – This extension allows you to open up a link in a tab that uses internet explorer to show the web page in a tab. It’s usefu for those sites that just don’t seem to work in firefox or those ones that require Internet explorere. I rarely use it but it’s nice to know it’s just a click away in those rare situations when I need it.
Image Zoom – This firefox extension allows you to zoom any image on a page. I find this handy with those annoying graphic captchas.. With out this extension there would be a lot more sites that I am not able to use.
PDF Download – Using this handy extension gives you the choice to download a PDF file rather than display it in Firefox itself.
Tab Mix Plus – This adds more options for tabbed browsing. One of my favorite additions is the option to show a download progress bar for each tab.