Firefox 30
Highlights:
- Box model highlighting in the Page Inspector
- Web Console support for executing JS in frames
- Web Console display improvements: code highlighting, node highlighting and inspection
- Network Monitor theme improvements, image thumbnails, image preview, HTML preview
- Browser Console input must now be enabled in Settings
- Icons for Scratchpad and other tools now hidden by default
More details:
- Support for console.count()
- New shortcut key to focus on web console command line
- Font family tooltip in the Inspector
- Firefox OS HUD features: memory tracking and jank monitor
All devtools bugs fixed between Firefox 29 and Firefox 30.
Firefox 29
Firefox 29 Hacks post. Highlights:
- Theme improvements, including major updates to the light theme
- Network Monitor performance analysis tool
- CSS source maps
- Changes in the way node selection works in the Inspector
- Classic call stack for the Debugger, and added the ability to highlight and inspect nodes
- Emacs and Vim keybindings in the source editor
Firefox 28
Firefox 28 Hacks post. Highlights:
- The App Manager has an integrated manifest editor
- The Split Console feature enables you to use the Web Console and another developer tool side by side
- Pretty-print minified JavaScript in the Debugger
- Color picker tooltip in the Inspector
- Browser Toolbox for debugging platform or add-on code
Firefox 27
Firefox 27 Hacks post. Highlights:
- The Shader Editor lets you view and edit WebGL shaders
- Instruct the debugger to break on DOM events to which you're listening
- Edit HTML in the Inspector
- See color swatches and background images in the Inspector's Rules view
- The Web Console now logs reflow events
- CodeMirror is now used as the source editor in many tools