Firebug 1.5 is here with new and improved features developers and designers will be very happy about:

• Enhanced Inspector
• More accurate Net panel timings
• Break on HTML mutation
• MathML and SVG namespace support
• Break on XHR
• Improved HTML editing
• Persist buttons on Console and Net panel
• Separate Computed CSS and Style subpanels
• Many many bugfixes and stability improvements

Read the release notes here and check out the announcement from Rob Campbell.

*Updates*