Roadmap

	Q4 2013	Q1 2014	Q2 2014	Q3 2014
	Firefox 27, 28 Firefox OS 1.2	Firefox 29, 30 Firefox OS 1.3	Firefox 31, 32 Firefox OS 1.4	Firefox 33, 34, 35 Firefox OS 1.5?
GC	Exact Rooting	Generational GC	Incremental Browser GC Marking? Memory-dependent GC Configuration? Compacting GC?	Concurrent GC? "G1: The Good Parts"?
ECMAScript/ES6	ECMA-402 i18n	Typed Objects? test262? WeakSet?		Classes? Modules? Symbols? (ES6 is expected to be published in Q4 2014.)
Parallel JS		SIMD?	Shared ArrayBuffers?	RiverTrail ParallelArray?
Firefox OS		Memory-dependent GC Configuration? Optimize DOM-to-JS Perf?	Start-up Cache
asm.js	Float32	Visual Studio plugin for JS debugger	asm.js parser?	Baseline Fallback FunctionPromise?
Dev Tools		jsdbg2?	tracelogger?	JS Memory Tracker?
Tom's Hardware's Web Browser Grand Prix (WBGP)	Win Peacekeeper?	Win Browsermark? (Next WBGP will likely test Firefox 25-26.)	Win JSBench?
Testing		test262 Selenium browser test? Run TBPL on all platforms? Run Peacekeeper on AWFY?	Run Browsermark on AWFY? Run JSBench on AWFY?	Run jQuery's or other JS libraries' unit tests in-house?

Q4 2013

Merge Date	Nightly	Aurora	Beta	Release
October 28	Firefox 28	Firefox 27	Firefox 26	Firefox 25
November	...	...	...	...
December 9	Firefox 29	Firefox 28	Firefox 27	Firefox 26

Full Query

ID	Summary	Whiteboard	Status	Assigned to
496923	Integrate ECMAScript 5 conformance test suite	[leave open]	RESOLVED	Jeff Walden [:Waldo]	No _
499198	[meta]Tracking performance on Peacekeeper benchmark		NEW		No _
619558	[meta] Implement generational garbage collection	[games:p2] [js:p1:fx31][talos_regression][qa-]	RESOLVED	Terrence Cole [:terrence]	No _
652780	[meta] Test262 Issues	sm-meta-retriage-2025	NEW		No _
753203	[meta] GC: Exact Stack Rooting		RESOLVED	Terrence Cole [:terrence]	No _
785905	IonMonkey: off thread MIR construction	[ion:t]	RESOLVED	Brian Hackett [Laid off!]	No _
837963	[meta] Implement ECMAScript Internationalization API		RESOLVED		No _
908050	Minimize number of files that depend on jsapi.h	[js:t]	RESOLVED	Nicholas Nethercote [inactive]	No _

8 Total; 2 Open (25%); 6 Resolved (75%); 0 Verified (0%);

Merge Date	Nightly	Aurora	Beta	Release
January 20	Firefox 30	Firefox 29	Firefox 28	Firefox 27
February	...	...	...	...
March 3	Firefox 31	Firefox 30	Firefox 29	Firefox 28

Full Query

ID	Summary	Whiteboard	Status	Assigned to
578700	[meta] Harmony typed objects (nés binary data)	[leave open]	RESOLVED		No _
586842	Store properties named by uint32_t separately from properties named otherwise		RESOLVED		No _
637378	Update meta-object protocol to be more ES5-like		NEW		No _
716647	[jsdbg2] allow Debugger to be enabled with debuggee frames on the stack		RESOLVED	Shu-yu Guo [:shu]	No _
792439	Implement ES6 WeakSet	[js:p2][DocArea=JS]	RESOLVED	Tom S. (please needinfo tschuster)	No _
797876	[jsdbg2] Introduce a new API for tracing profiling	[firebug-p1]	NEW		No _
837314	Implement ES6 classes	[DocArea=JS]	RESOLVED		No _
851699	[meta] Investigate performance on Browsermark		NEW		No _
885526	[meta] Shumway-relevant performance faults	[js:t]	RESOLVED		No _
891877	[meta] PJS: Ensure that a well-defined subset of JS will always execute in parallel after warmup period		RESOLVED		No _

10 Total; 3 Open (30%); 7 Resolved (70%); 0 Verified (0%);

Merge Date	Nightly	Aurora	Beta	Release
April 14	Firefox 32	Firefox 31	Firefox 30	Firefox 29
May 26	Firefox 33	Firefox 32	Firefox 31	Firefox 30
June	...	...	...	...

Full Query

ID	Summary	Whiteboard	Status	Assigned to
650361	Refactor JSContext/JSRuntime		RESOLVED	Jan de Mooij [:jandem]	No _
800200	rm JSD	[firebug-p1]	RESOLVED	Jim Blandy :jimb	No _
900784	[meta] Add start-up cache for any JavaScript code.	[shumway:p1] [platform-rel-Facebook]	RESOLVED	Nicolas B. Pierron [:nbp]	No _

3 Total; 0 Open (0%); 3 Resolved (100%); 0 Verified (0%);

Merge Date	Nightly	Aurora	Beta	Release
July 7	Firefox 34	Firefox 33	Firefox 32	Firefox 31
August 18	Firefox 35	Firefox 34	Firefox 33	Firefox 32
September 29	Firefox 36	Firefox 35	Firefox 34	Firefox 33

Full Query

ID	Summary	Whiteboard	Status	Assigned to
568953	[meta] ES6 modules	[leave open]	RESOLVED		No _
645416	Implement symbols		RESOLVED	Jason Orendorff [:jorendorff]	No _
694100	[meta] Tracking bug for ECMAScript 6 in SpiderMonkey		NEW		No _
801869	PJS: Efficient threaded runtime for data-parallel JavaScript	[PJS][js:t]	RESOLVED		No _
902174	G1: The Good Parts		RESOLVED	Terrence Cole [:terrence]	No _

5 Total; 1 Open (20%); 4 Resolved (80%); 0 Verified (0%);

Summary	Owner	More Info
PJS: Prototyping Shared ArrayBuffers	TBD
Memory-dependent GC Configuration	TBD
Dev Tools to track JS memory consumption	TBD	Important for B2G! Releated bugs 834614, 894971, 896088?
Compacting GC	terrence?
Incremental Browser GC Marking	terrence?
Nursery allocation of JSStrings	terrence?
Concurrent GC	terrence?
Optimize ARM performance for Firefox OS and Android	dcrosher, jcoppeard, mrosenberg
OdinMonkey	luke	https://wiki.mozilla.org/Javascript:SpiderMonkey:OdinMonkey
Visual Studio integration with Emscripten	Naveed waiting on contractor SOW
Selenium Browser Benchmark	jmaher, bclary, luke	https://etherpad.mozilla.org/js-benchmarking
Run TBPL Tests On All Platforms	TBD	Get our existing test suites running on TBPL in all combinations of the shell and browser on both desktop and ARM.
Optimize DOM-to-JS perf	TBD	B2G drag events are generating way more callbacks than click events on a desktop. Related bugs 840201, 840488?
Other ES6 features?	TBD
Start ES7 features?	TBD