A lot of people ask me “What are your favorite Firefox extensions?” Ok. Actually, they don’t. But if they did, here is what I would say:
Firebug
Firebug is arguably the best extension out for web developers. I use it mainly for inspecting the HTML of pages, viewing CSS styles that are applied to HTML elements, and editing CSS styles and HTML text in real-time. It’s also really helpful for debugging JavaScript, viewing Ajax calls, and inspecting a web page’s DOM.
Web Developer
If Firebug is the not best extension out for web developers, then the Web Developer extension is the best. It has so many useful tools: disable styles, view cookies and session information, the ruler, and so on.
Colorzilla
I have this extension mainly because it allows me to find out colors on a web page without opening Photoshop. Though, I wish it would work with embedded Flash files.
FireFTP
I love the convenience of having an fully-functional FTP client in your browser.
Live HTTP Headers & Tamper Data
Pretty self explanatory. View and modify the HTTP headers of your web pages. Great tool.
del.icio.us Bookmarks
This is a must-have extension for anyone who uses del.icio.us. View your bookmarks in your sidebar. Bookmark a page directly to del.icio.us. Hide your browser’s bookmarks menu. It’s a great complement to del.icio.us.
Foxmarks Bookmark Synchronizer
I started using Foxmarks before I opened my del.icio.us account. Eventhough I removed all my bookmarks saved in my browser since, I still use it to keep my bookmarks toolbar synced up.
Mouse Gestures
I probably use mouse gestures too much. It’s now a habit for me to use a mouse gesture in any browser I work in, only to find out it doesn’t work. Mouse gestures just make things easier.
Download Statusbar
Another convenience extension. All current downloads in the statusbar. Pretty simple.
PDF Download
Once again, another convenience extension, mainly because for a while, I only had the trial version of Adobe CS3, and it wouldn’t let me open PDFs. Plus, a PDF auto-opening in your browser is just annoying.