Development
- EditCSS. Edit stylesheets in-browser, without needing to refresh the page.
- Live HTTP Headers. See what’s actually going on in your requests without firing up a sniffer
- Checky. Handy links to validators and SEO tools in your context menu.
- DOM Inspector. Browse around the DOM tree of a document. Also handy for seeing what properties are accessible from JavaScript without cracking open The Big Book.
- Venkman. Full-featured JavaScript debugger.
UI & Browsing
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