[Jason Vines]

Within this topic shall appear tips and tricks to optimize Firefox's performance, as well as links to cool themes and extensions.

I shall start off this thread with some useful extensions:

ForecastFox - Functioning similarly to Weatherbug, though without the annoying ads, this gives you the weather in the status bar of your Firefox browser.

StumbleUpon is a neat Firefox extension. It allows users to navigate to various webpages at random, perhaps ones they otherwise wouldn't have seen, and rate them.

Sage is a robust RSS aggregator for Firefox.

Web Developer is a handy yet comprehensive tool for, you guessed it, web developers.

Answers adds a "Look up on Answers.com" option to the right-click context menu. Right-click on any word, click on "Look up...", and you will be taken to a page with everything about the word.

Broadband Speed Test and Diagnostics performs download and upload speed tests. It also displays your public IP address.

Foxmarks Bookmark Synchronizer allows you to store your bookmarks on a central server so you can maintain a consistent bookmarks list between different computers.

Copy Plain Text adds an option to the right-click context menu for copying text on a web page without formatting. This is handy for pasting text from a web site into a rich text forums editor or a word processing program.

Right-Click-Link opens text you highlight as a URL in a new tab, saving you from the chore of copying non-link URL's and pasting them into the address bar.

This post has been edited by Jason Vines: 20 May 2007 - 08:50 AM
Reason for edit: Added more extensions.

[Mephistox]

I'm a fan of infoRSS (get it here) as my RSS feed extension.
I'm not sure how it compares to Sage, but you get a scrolling ticker, whose speed and number of news items is totally customizable, along with auto-adding RSS feeds from pages with the click of a button. You can arrange groups of RSS feeds and have the extension scroll through them and have news items you have read disappear after being clicked on. By default, all clicked items open up a new tab, though you can set it to open in the current tab, a new window, or the current window.
In short, its definately worth giving a try.

Also:
IE View, handy for visiting the sites that haven't yet adjusted to Firefox's awsomeness
and
Bug Me Not, an amazing extension that will autofill login and password fields for many news sites including NYTimes.com, ChicagoTribune, NYPost, LA Times, etc, etc, so that you can get straight to the story.

[Jason Vines]

I update this thread every now and then with neat new extensions, so be sure to check back sometimes.

[Jason Vines]

I have added two more extensions.