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Firefox 25 for developers

Want to help document Firefox 25? See the list of bugs that need to be written about and pitch in!

Changes for Web developers

New in Firefox DevTools

  • The inspector now features autocompletion for css names and values.
  • The debugger now lets you "black box" script files, to prevent breakpoints from stopping in library code you're not interested in debugging.
  • The Profiler now has the ability to save and import profiling results. "Show Gecko Platform Data" is now an option in the Firefox devtools options.
  • The Network panel has a right click context menu, with copy and resend url commands.
  • Numerous under-the-hood changes may make some rewriting necessary for addons that modify the DevTools.



  • The srcdoc attribute of <iframe>, allowing the inline specification of the content of an <iframe>, is now supported (bug 802895).
  • When used with a "image/jpeg" type, the method HTMLCanvasElement.toBlob now accepts a third attribute defining the quality of the image (bug 891884).


EcmaScript 6 (Harmony) implementation continues!



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See also

Older versions

Document Tags and Contributors

Last updated by: teoli,