Preferences Cleaner

Preferences Cleaner allows you to automatically track installation or uninstallation of Firefox extensions. When uninstalling an extension, you can automatically remove all its preferences. Alternatively, you may opt to remove them later manually.

rikaichan

rikaichan is a Japanese to English/German/French/Russian dictionary. Just hover the mouse pointer over a word, and a popup with both the reading and the meaning appears. The add-on automatically de-inflects verbs and adjectives and has a detailed kanji view. For Dictionaries see http://rikaichan.mozdev.org/.

Perapera Chinese Popup Dictionary

Perapera Chinese Popup Dictionary allows you to look up the pronounciation and meaning of any Chinese word that occurs on a webpage by just hovering the mouse pointer over it. Dictionaries for English (built-in), German, and French are available, it supports Pinyin and Zhuyin as well as simplified and traditional characters.

• Perapera Chinese-French Dictionary File
• Perapera Chinese-German Dictionary File

Copy Link URL

Copy Link URL copies the URLs of selected links to the clipboard.

Extended Statusbar

Extended Statusbar provides a Statusbar with speed, percentage, time and loaded size (similar to Opera's one)

Multi Links

Multi Links lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.

HashColouredTabs+

HashColouredTabs+ improves tab identification by providing a small colored icon for any site which doesn't have its own favicon.