https://addons.mozilla.org/firefox/60/

Adds a menu and a toolbar with various web developer tools.

del.icio.us Bookmarks 1.3.73 by Yahoo! Inc.

This extension integrates your browser with del.icio.us (http://del.icio.us/), the leading social bookmarking service on the Web. It does this by replacing the default bookmarking functionality in Firefox with a new experience that offers the following advantages:

- Search and browse your bookmarks
- Access your bookmarks from any computer at any time
- Keep your bookmarks organized with tags
- Share your bookmarks with friends or anyone on the Web
- Import your existing Firefox bookmarks

After installing this extension, your browser bookmarking functionality will change significantly. If you want to use del.icio.us but also want to keep your existing Firefox bookmarking functionality, please try the “classic” del.icio.us extension, available at:
https://addons.mozilla.org/firefox/1532.

If you are a user of Google Browser Sync or Foxmarks, please note that del.icio.us Bookmarks currently conflicts with these extensions and will therefore prompt you to disable them during installation.

For a product tour and more details about this extension, please visit:
http://del.icio.us/help/firefox/bookmarks/quicktour

For product feedback, commentary & enhancement requests, please post to:
http://tech.groups.yahoo.com/group/delicious-firefox-extension/

This software is governed by the EULA at the following location, by clicking on install, you are agreeing to these terms:
http://del.icio.us/help/firefox/bookmarks/license

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This is a companion extension to Adblock or Adblock Plus and should be used in conjunction with it. This extension automatically downloads the latest version of Filterset.G every 4-7 days. Filterset.G is an excellent set of filters maintained by G for Adblock that blocks most ads on the internet. In addition, this extension allows you to define your own set of filters that you can add along with Filterset.G during an update. To report missed ads or problems with the extension visit the support forums http://forum.pierceive.com/.

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The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface. An essential.
For Firefox versions earlier than 2.0, use v1.4 of Colorful Tabs from https://addons.mozilla.org/firefox/1368/history/

Blog: http://colorfultabs.blogspot.com/