New add-ons that I'm still experimenting with to see whether or not they are useful and reliable.
Save time by speeding up repetitive tasks. Get faster, parallelized downloads, see definitions, auto-load the next page, improve searching, and more. FastestFox will dramatically enhance your productivity!
ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon
For Firefox 23+, you need 0.958 (under review)
New Tab King is the premier extension for turning your new tab page into a beacon of productivity and efficiency.
Featuring a todo list, recently closed tabs, most visited pages and more!
Tons of visual customization option too!
Stop secret tracking of your web browsing.
See video: http://www.abine.com/preview/taco.php
Keep your personal info private on the web with new & powerful privacy tool, MaskMe.
Gives a possibility to create custom toolbarbuttons...
Edit textareas using an external editor, because it's all text!
Right click on a textarea, select "It's All Text!" and edit the text in the editor of your choice.
Alternatively, click on the edit buttons added for your convenience. Right click on ...
'lori' can tell you how long it takes to load
a page. Useful for web developers who are working on profiling, optimizing a web site.
Display Wolfram Alpha results in Google searches.
No need to switch search engines when you can use both at once!
FrameExt is a Firefox Addon to extend frame functions:
1. Change the frame url.
2. Adjust iframe Size to Fit its Contents
3. Remove iframe from page
4. Merge iframe content to the parent page
More to come in future versions.
Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.