With the last Firefox major upgrade a number of them failed to update and others took ages to update. This now seems to have settled down but I have had to find replacements for a few that remain incompatible and for some I haven't found an easy replacement.
TinyUrl Creator · ScrapBook · ReminderFox · Menu Editor · Advanced Dork · Text/Plain and one which I would like the functionality of but I haven't found a simple compatible replacement LinkChecker.
With the bit.ly Preview Plugin for Firefox, whenever you hover over a bit.ly URL on any web page, we display a tooltip showing the Page Title, Long URL, and any Click Data we have about the page the URL links to.
Extended Copy Menu
Provides the option to copy selection as plain text or html.
Performance and network tweaks for Firefox, without the Enhanced Prefetching.
A full-featured blog editor that integrates with your browser and lets you easily post to your blog. I may drop this and I hardly ever use it.
Shareaholic is the ultimate tool for sharing stuff with 60+ destination services including Facebook, Twitter, Gmail, Delicious, MySpace, Wordpress, and more!
Shorten long URL from context menu or toolbar button with your selected URL shortener and display the result in location bar.
Adds a tab listing dependencies and their sizes in the Page Info window.
Contextually relevant suggestions of links, pictures, related content and tags will make your blogging fun again.