More for me to find again than you to read about, but still... oh and I finally broke down and found a Firefox icon.
ForecastfoxGet international weather forecasts from AccuWeather.com, and display it in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Bookmark BackupBookmark Backup is a simple extension that helps to keep your bookmarks (and optionally other Firefox settings) safe. Each time Firefox is closed, a copy of your bookmarks file will be made to a backup location. If Firefox's bookmarks become corrupted or lost, find the most recent uncorrupted backup and copy it into your profile folder.
LinkificationAllows Firefox (0.9+) to view plain-text URLs and e-mail addresses as actual links
Copy Plain TextCopies text without formatting
Tabbrowser Preferences This extension provides a comprehensive UI for changing a number of the hidden tabbed browsing preferences in Firefox. It also provides the ability to control how internal and external links are opened in the browser and how the browser will react when links are sent to it.
TinyUrl CreatorThis extension brings the
http://tinyurl.com functionality closer to your fingertips. It will convert a long URL into a much smaller, more managable one which is easier to share through email and instant messanger. This
IE TabAn extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox. This is a great tool for web developers, since you can easily see how your webpage displayed in IE with just one click and then switch back to Firefox. (CRK note - I no longer have to click the big blue E to do things that "require IE". Frackin' ActiveX...)