Closed Opened 3 years ago Closed 3 years ago

# Bump subsystem version to 6.01 to block Firefox from running on Windows XP/2003/Vista

x86
Windows
Not set

## Tracking

### (firefox52 wontfix, firefox53 fixed)

RESOLVED FIXED
mozilla53
Tracking Status
firefox52 --- wontfix
firefox53 --- fixed

## Attachments

### (1 file)

 58 bytes, text/x-review-board-request glandium : review+ Details
to unblock some bugs that will break WinXP.
Note: crashtest failures are unrelated to this bug (see bug 1319318).
Also, MozReview claims 3 failures from excluded jobs due to bug 1321953.
 With utmost respect, why can you not let Nightly-53.0a1 die a dignified death under Vista SP2?
For starters, VistaSP2 != WinXP, but rather VistaSP2 ~ Win7; you may have already modified
"firefox-53.0a1.en-US.win32.installer.exe" so as to not install on Vista (last one that does is
for BuildID=20161122030216), but I'll have you know that every single "zip" version since then
has been running flawlessly on VistaSP2; here's a shot from latest one at the time of posting:

http://i.imgur.com/4TEK8OX.jpg

I realise that further down the 53.0a1 cycle you may introduce code that is truly
incompatible with Vista (e.g. one that makes API calls to functions not present in the
Vista kernel, or some other type of incompatibility), but then it would be death by
natural causes; artificially disabling Fx-53.0a1 beforehand, denying it the ability
to even try to run, is not "killing" Vista support, but "murdering" it before its time...

I bet you if you set subsystem version to 6.00 you'll be able to "unblock your bugs
that will break WinXP", but at the same time allow advanced users/testers on Vista to
enjoy Nightly for (much?) longer...
And despite all that's been posted already, I still can't grasp the reason XP and Vista
were put together on the same sinking ship :-(
AFAIK no official decision has been made with regards to dropping XP support. While I appreciate the eagerness to code these patches so they are ready for when we do, given the velocity of changes to the build system lately (especially configure), I think it's best to hold off reviewing them.
(In reply to Gregory Szorc [:gps] from comment #5)
> AFAIK no official decision has been made with regards to dropping XP support.

Hello Gregory; AFAYK? Let me bring you up to speed:

bug 1130266
bug 1303827
bug 1315083
bug 1310836
bug 1312085
bug 1315153
bug 1305453
bug 1317569
bug 1317716
bug 1317780
bug 1318025
bug 1318671
bug 1318920
bug 1318921
bug 1318922
bug 1319162
bug 1319164
bug 1319167

and possibly many more that I am not aware of :-( . What pains me the most is that even
in this case, you (Mozilla Organization) had to ape Google Chrome in every single aspect
and carry VistaSP2 along with XP; you do have a fancy name for that, too, it's called
"chrome parity" !
I begin to sound as if I am ranting, I know better than that, so apologies...
pdol: can you please give guidance for build system support for various Windows versions? We need to know which versions of Windows we're expected to support in mozilla-central.
Flags: needinfo?(pdolanjski)
(In reply to Gregory Szorc [:gps] from comment #5)
> AFAIK no official decision has been made with regards to dropping XP
> support.

What is the definition of "official decision"? The system requirements page already says "From Firefox 53 planned for April 2017, Windows XP/Vista/Server 2008 are no longer supported."
I was looking for a mailing list or blog post outlining things. But from all the other linked bugs, it's apparent change is happening. I just need to know what support (if any) the build system needs to retain for XP. And pdol can answer that.
(In reply to Gregory Szorc [:gps] from comment #9)
> I was looking for a mailing list or blog post outlining things.

https://groups.google.com/forum/#!topic/mozilla.dev.platform/W6pUpP_FbZY
The first post says "tentative" and https://chuttenblog.wordpress.com/2016/10/28/firefox-windows-xp-exit-plan/ says "pending approval." This language doesn't meet my standards for action to nuke all XP support from the build system. I have a trust anchor in bsmedberg and he says to ask pdol. So that's what I've done.
Sorry for the lack of an official answer (just waiting on a blog post to be published).
The answer is that XP/Vista users will definitively be moved to ESR52 and will be supported until September, 2017 at a minimum on that branch.
Flags: needinfo?(pdolanjski)
So the build system does not have to support XP/Vista at all on mozilla-central (currently 53). Let's move forward.
If other parts of Firefox/Gecko are explicitly dropping compatibility with XP/Vista, then it makes no sense for the build system to retain support for XP/Vista. If this assumption about others parts of Firefox/Gecko is true, then my opinion as build module owner is we should remove all build system code related to supporting XP/Vista.
I'm going to add changes to drop compatibility. But many of them require build system changes (bug 1317569 and 1318025, for example). And :glandium said we should not add such changes until at least this bug is fixed. Circular dependence :(
Bug 1324183 has landed (that is, dom/media, a part of Firefox/Gecko explicitly dropped the compatibility with XP/Vista). Already one person complained about that Nightly broke on an anyway-unsupported platform (see bug 1324183 comment #15). We should not pretend to passively "support" XP/Vista any longer.
Flags: needinfo?(mh+mozilla)
Blocks: 1324790
Comment on attachment 8817625 [details]
Bug 1322646 - Bump subsystem version to 6.01 to block Firefox from running on Windows XP/2003/Vista.

https://reviewboard.mozilla.org/r/97848/#review100558
Attachment #8817625 - Flags: review?(mh+mozilla) → review+
Flags: needinfo?(mh+mozilla)
Pushed by mh@glandium.org:
https://hg.mozilla.org/integration/autoland/rev/b354f4a88fe1
Bump subsystem version to 6.01 to block Firefox from running on Windows XP/2003/Vista. r=glandium
https://hg.mozilla.org/mozilla-central/rev/b354f4a88fe1
Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla53
Masatoshi, what is the user experience when a Windows XP or Vista user tries to run a firefox.exe build with subsystem version 6.01?
Flags: needinfo?(VYV03354)
(In reply to Chris Peterson [:cpeterson] from comment #20)
> Masatoshi, what is the user experience when a Windows XP or Vista user tries
> to run a firefox.exe build with subsystem version 6.01?

A message box will be shown with the following message:
"<C:\path\to\exe>\firefox.exe is not a valid Win32 application."
(<C:\path\to\exe> is an install location.)
Flags: needinfo?(VYV03354)
Blocks: 1325503
Will this impact machines that are running Firefox in compatibility mode? If so, do we know how many users on supported machines have compatibility mode enabled and have it set to a now unsupported Windows version?

FWIW, when I deployed a Firefox update hotfix extensions ~2.5 years ago, 0.7% of users had compatibility mode enabled (https://mail.mozilla.org/pipermail/firefox-dev/2014-July/001997.html). Unfortunately, I'm not sure which Windows versions(s) those were set to or if the data is still around or valid.

It /might/ be worth conducting a metrics experiment to see how many Windows 7+ users may inadvertently lose Firefox access if this commit locks out compatibility mode users.

needinfo bsmedberg so he's aware of the potential issue. (Someone please cancel it if this change doesn't impact compatibility mode.)
Flags: needinfo?(benjamin)
No, compatibility mode does not affect Windows loader. I verified the latest Nightly run with compatibility mode enabled on Windows 7 and Windows 10.
Flags: needinfo?(benjamin)
Blocks: 1337331
Product: Core → Firefox Build System
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