Firefox/Win64

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Objective

Make 64-bit Firefox the default version for new and existing eligible users to reduce our OOM crash rate, increase performance, and improve security (ASLR).

Users are eligible for a 64-bit default if they are running 64-bit Windows 7+. 32-bit Firefox running on 64-bit Windows can access about 3,800 MiB of virtual address space (4 GiB minus overhead from physical memory reserved for the OS and BIOS). For users with less than 4 GiB of physical memory, there is a trade-off between the larger virtual address space and the overhead of 64-bit code. We have decided to remove any minimum memory requirement for 64-bit Firefox because we don't want to withhold the security benefits of ASLR. Also, 2 GiB RAM is Microsoft's minimum memory requirement for Windows 7 through 10.

Schedule

  • 2015 Q2
  • 2015 Q4
  • 2016 Q3
    • [DONE] July 20 - Announced NPAPI to be removed in Firefox 52: Reducing Adobe Flash Usage in Firefox
    • [DONE] August 29 - Web team will start redesigning download page redesign for 64-bit
    • [DONE] September 23 - Web team will start A/B test of new download page
  • 2016 Q4
    • [DONE] October 7 - Web team will complete A/B test of new download page
    • [DONE] October - Drop support for non-Flash NPAPI plugins in Nightly 52 (bug 1269807)
    • [DONE] October - Create dashboards for 64-bit rollout criteria
    • [DONE] November 24 - Make 64-bit Firefox the default in the stub installer for all eligible users in Nightly 53 (bug 797208)
  • 2017 Q1
  • 2017 Q2
    • [AT RISK] April - TBD: Let Flash async drawing ride to Beta 54?
    • [ON TRACK] April 18 - Firefox 53 release
    • [PROPOSED] April - Google will upgrade 32-bit Chrome users starting in April.
    • [ON TRACK] June 13 - Firefox 54 release
    • [PROPOSED] June - Run Funnelcake test to compare 32-bit vs 64-bit for eligible Release 54 users
  • 2017 H2
    • [ON TRACK] August 8 - Firefox 55 release (with 64-bit default)
    • [PROPOSED] August ~10 - TBD: Announce 64-bit default for new installs of Firefox 55? (Talk to Fabio Rios and Justin Crawford about blog post)
    • [ON TRACK] October 3 - Firefox 56 release
    • [PROPOSED] October - Upgrade existing eligible 32-bit Firefox users to 64-bit (bug 1274659) in 56? TBD: Should we blog about this 32-bit upgrade?

Release Criteria

Links

Bugs

ID Priority Summary Whiteboard Keywords Assigned to
1344220 -- Enable stub installer downloads for win64 for all desktop Firefox channels
1284375 -- Make the x86-64 asm in NSS compliant with Windows x86-64 ABI
1357489 -- Downloading a file from Flash application with Firefox 64 bits is broken (slowness, "You don't have permission to save in this location") sbwn1 64bit
1309847 -- Optimizely Win64 A/B testing
1359886 -- Regression April 12th in accelerated Flash async plugin drawing use Jim Mathies [:jimm]
1314491 -- Kongregate's Flash game doesn't load with Flash protected mode disabled and plugin asyncdrawing enabled fixed by bug 1348629 regression
1334803 -- Xfinity TV video playback fails in 64-bit builds of Firefox [Xfinity cloud dvr feature related?][sb+] regressionwindow-wanted
1310163 -- Win64 Funnelcake comparative user sentiment Heartbeat experiment Rob
1333486 -- Crash in @0x0 | idmcchandler7_64.dll@0x238bf crash [:philipp]
1348629 P1 Zero sized Flash content does not load on 64 bit Firefox 64bit Jim Mathies [:jimm]
1309844 P2 Funnelcake build request to support Win64 A/B testing
1276558 P3 Crash in `anonymous namespace''::TypeAnalyzer::insertConversions crash
1359506 P3 Re-enable Win64 tests on Try by default

13 Total; 13 Open (100%); 0 Resolved (0%); 0 Verified (0%);


ID Priority Summary Whiteboard Keywords Assigned to
1314491 -- Kongregate's Flash game doesn't load with Flash protected mode disabled and plugin asyncdrawing enabled fixed by bug 1348629 regression
1347925 -- wmode direct flash reverts to windowed mode if browser hardware acceleration is disabled
1311975 -- Cannot interact with Flash Video Controls on certain site gfx, STR in comment #0 (32bit only) regression
1347575 -- Disabling acceleration in flash breaks flash settings dialog on live.nicovideo.jp
1311374 -- Video fails to update after exiting full screen and scrolling the video in and out of view gfx, layout, STR in comment #0 regression
1348629 P1 Zero sized Flash content does not load on 64 bit Firefox 64bit Jim Mathies [:jimm]

6 Total; 6 Open (100%); 0 Resolved (0%); 0 Verified (0%);


Team

Role Contact
Product Management Romain Testard
Engineering David Parks (Flash sandbox), Matt Howell and Robert Strong (installer), Stéphanie Ouillon (Flash sandbox review)
QA Ryan VanderMeulen
UX Michael Verdi (Firefox), Jon Petto (Mozilla.org)
Release Management Sylvestre Ledru
Release Engineering Chris AtLee
Firefox Program Management Chris Peterson
Mozilla.org Program Management Jennifer Bersch
Add-ons Jorge Villalobos