Firebug Roadmap

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Revision as of 01:55, 18 October 2013 by Sebastianz (Talk | contribs) (Added "Sniff WebSocket traffic" to the roadmap)

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  • This page is intended to summarize plans and directions for
  • Provide any feedback on Firebug newsgroup


This section describes the strategy and goals that keep Firebug a competitive in-browser tool and leader in space of in-browser developer tools.

Version Numbering

The next planned version number is 1.13.

Development happens on master branch (currently alpha).

If a significant new feature (or set of features) is introduced in new release, the version numbering can move into 2.* scheme. An example of such a feature can be support for JSD2 or even remote debugging.


Phase Start Date
Alpha 2013-08-14
Beta 2013-01-14
Final release 2013-02-14
  • The entire release cycle (from the first alpha to the final release) should target 6 months
  • The beta phase should be at least 4 weeks
  • The new release should introduce 8-10 new features (or significant bug fixes)

Suggested Features

Use this section to suggest any feature you'd like to see in

  • Remote Debugging (reason: allows debugging on mobile devices; built-in dev tools already have this)
  • Undo/redo option in HTML panel (+ CSS + DOM if possible) (issue 54, issue 2569; reason: people should be able to easily undo mistakes; built-in dev tools already have this)
  • Cut option in HTML panel (issue 6217; reason: we already allow to copy HTML, OS conformity)
  • Ignoring scripts while debugging (aka "black boxing", issue 4888; reason: makes debugging easier; built-in dev tools already have this)
  • Script pretty printing (issue 1238; reason: people want to be able to debug compressed JavaScript)
  • New inspector (issue 4848; would fix a bunch of problems; built-in dev tools already use a better approach)
  • Display of pseudo-elements inside HTML Panel (issue 5785; reason: better UI and fixes issues; built-in dev tools have this now)
  • Linux theme (issue 471; reason: better integrated UI for Linux users)
  • Request auto-responder in the Net Panel (issue 6459; reason: makes much easier to debug response headers and JS files in a production environment).
  • Integrate EventBug into Firebug (issue 5440; reason: simplifies debugging of event listeners)
  • New screencasts! (issue 4508; reason: current screencasts are completely outdated, new features need to be described)
  • User statistics collector (2633; reason: get info about Firebug usage to get a clue how to improve the UX)

Planned Features / Changes

This section summarizes all features that are planned for Every feature in this section must have an owner.

Regular Tasks

Feature Overview

Feature Developers Related Issues Status
Adopt JSD2 Honza, Sebastian, Farshid Issue 5421: Adopt JSD2 started
Syntax highlighting for JavaScript Honza Issue 4823: Native javascript code color/highlight (without FireRainbow extension)
Issue 5175: Integrate Orion as replacement for the Script panel UI
Issue 5353: Integrate CodeMirror instead of Orion editor
Auto-completion for Command Editor Simon Issue 55: Auto-completion for Command Editor
issue 5741: Auto-completion within expression in Command Line
not started
Line numbers in CSS Edit Mode Farshid Issue 2153: Show line numbers in Edit mode started
Folding for shorthand properties Sebastian Issue 5523: Folding for shorthand properties not started
Sniff WebSocket traffic Florent Issue 6330: Sniff WebSocket traffic not started

Feature planning should keep in mind the suggested release schedule above

Feature Description

This section provides detailed description of all planned features.

Adopt JSD2

Firebug script debugger and all related features like BON (break on ...) should be based on new JSD2 API. Using JSD2 API will also enable remote debugging.

Part of this task is also internal Firebug architecture refactoring so it's ready for remote debugging features. Note that adopting JSD2 doesn't automatically mean that Firebug is remote-debugging-ready. This is covered by issue 5837

Note that this task doesn't have to make it into, but it could be possible (if useful) to at least merge code changes.


Source Repository: Development happens on JSD2 branch

Syntax highlighting for JavaScript

The Script Panel should have syntax highlighting enabled for the displayed JavaScript code.


  • Replace SourceBox code by Orion
  • Re-add context menu options
  • Adjust CSS to match the Firebug UI

Auto-completion for Command Editor

Add the Command Line auto-completion to the (multi-line) Command Editor inside the Console Panel.


  • Allow auto-completion within an expression
  • Add auto-completion to the Command Editor
  • Enhance positioning of the Completion List Popup

Line numbers in CSS Edit Mode

The Source Edit Mode of the CSS Panel should have line numbers for easier navigation.


  • Integrate Orion into the Source Edit Mode
  • Ajust the display to fit to the Firebug UI

Folding for shorthand properties

For shorthand CSS properties it should be possible to expand them to see the longhand properties that make them up.


  • Save the longhand properties to every shorthand property
  • Create a twisty and allow toggling the display of the longhand properties
  • Remove the Expand Shorthand Properties option

Sniff WebSocket traffic

WebSocket requests should be displayed to the user.


  • Create new tab for WebSocket requests
  • Listen to WebSocket traffic
  • Dynamically output the WebSocket messages