Is your FF nightly on OSX mysteriously slow?

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Is your FF nightly on OSX mysteriously slow? david bolter 6/4/12 12:32 PM
Is your Firefox nightly acting slow and/or bloated on mac?

The might be that our alpha quality a11y support on mac is somehow getting
instantiated. While we work on proper fixes we recommend that if you don't
require system a11y services on Mac that you turn them off as a workaround.
In System Preferences under Universal Access the checkbox to uncheck is:
"Enable access for assistive devices".

Please keep an ear out for others that might be encountering this problem
and spread the word.

David
Re: Is your FF nightly on OSX mysteriously slow? Benjamin Smedberg 6/4/12 12:42 PM
On 6/4/2012 3:32 PM, david bolter wrote:
> Is your Firefox nightly acting slow and/or bloated on mac?
>
> The might be that our alpha quality a11y support on mac is somehow getting
> instantiated. While we work on proper fixes we recommend that if you don't
> require system a11y services on Mac that you turn them off as a workaround.
> In System Preferences under Universal Access the checkbox to uncheck is:
> "Enable access for assistive devices".
I have that on by default, I think it was needed for "witch" or some
other system tool. Do we have metrics (via telemetry or otherwise) on
what percentage of users have this on by default, and whether unwanted
accessibility would be slowing down Firefox?

--BDS

Re: Is your FF nightly on OSX mysteriously slow? Andrew McCreight 6/4/12 12:54 PM
There are a number of accessibility related telemetry flags, including A11Y_INSTANTIATED_FLAG and A11Y_ISIMPLEDOM_USAGE_FLAG.  Maybe one of those would be useful.

>
> --BDS
>
> _______________________________________________
> dev-platform mailing list
> dev-pl...@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-platform
>
Re: Is your FF nightly on OSX mysteriously slow? Chris Peterson 6/4/12 1:01 PM
On 6/4/12 12:32 PM, david bolter wrote:
> In System Preferences under Universal Access the checkbox to uncheck is:
> "Enable access for assistive devices".

Mac a11y is also activated if you have enabled multi-language input
sources (i.e. you see a country flag in your menu bar). The setting is
in System Preferences > Language & Text > Input Sources.


chris
Re: Is your FF nightly on OSX mysteriously slow? david bolter 6/4/12 1:05 PM
For nightly (15) darwin I'm seeing 12.74% of users. I'd like to see the
whitelist solution asap (bug 759736) while in the meantime we disable a11y
on mac (bug 761256).

David

On Mon, Jun 4, 2012 at 3:54 PM, Andrew McCreight <amccr...@mozilla.com>wrote:

>
>
> ----- Original Message -----
> > On 6/4/2012 3:32 PM, david bolter wrote:
> > > Is your Firefox nightly acting slow and/or bloated on mac?
> > >
> > > The might be that our alpha quality a11y support on mac is somehow
> > > getting
> > > instantiated. While we work on proper fixes we recommend that if
> > > you don't
> > > require system a11y services on Mac that you turn them off as a
> > > workaround.
> > > In System Preferences under Universal Access the checkbox to
> > > uncheck is:
> > > "Enable access for assistive devices".
Re: Is your FF nightly on OSX mysteriously slow? Ehsan Akhgari 6/4/12 1:10 PM
Oh, why is that needed?  How can I explicitly check to see whether I
have a11y enabled in my Firefox?

--
Ehsan
<http://ehsanakhgari.org/>
Re: Is your FF nightly on OSX mysteriously slow? Rob Campbell 6/4/12 1:25 PM
You can run the following in a Browser scratchpad (display):

var enabled = false;
try {
  enabled = components.manager.QueryInterface(Ci.nsIServiceManager)
                      .isServiceInstantiatedByContractID(
                        "@mozilla.org/accessibilityService;1",
                        Ci.nsISupports);
} catch (ex) {
  enabled = false;
}

enabled

~ rob
Re: Is your FF nightly on OSX mysteriously slow? Ehsan Akhgari 6/4/12 1:31 PM
Following this, a11y is actually disabled for me, even though I have
multiple keyboard layouts set up.

--
Ehsan
<http://ehsanakhgari.org/>
Re: Is your FF nightly on OSX mysteriously slow? Rob Campbell 6/4/12 1:33 PM
Yeah, I think the grand master preference is actually the Enable Access for Assistive Devices check in Universal Access.

(ps, aforementioned script was courtesy of David Bolter).
Re: Is your FF nightly on OSX mysteriously slow? Gavin Sharp 6/4/12 1:40 PM
typo (masked by try/catch!): Components, not components
Re: Is your FF nightly on OSX mysteriously slow? Rob Campbell 6/4/12 1:55 PM
r-!
Re: Is your FF nightly on OSX mysteriously slow? L. David Baron 6/4/12 2:02 PM
On Monday 2012-06-04 16:10 -0400, Ehsan Akhgari wrote:
> On Mon, Jun 4, 2012 at 4:01 PM, Chris Peterson <cpet...@mozilla.com> wrote:
> > On 6/4/12 12:32 PM, david bolter wrote:
> >>
> >> In System Preferences under Universal Access the checkbox to uncheck is:
> >> "Enable access for assistive devices".
> >
> >
> > Mac a11y is also activated if you have enabled multi-language input sources
> > (i.e. you see a country flag in your menu bar). The setting is in System
> > Preferences > Language & Text > Input Sources.
>
> Oh, why is that needed?  How can I explicitly check to see whether I
> have a11y enabled in my Firefox?

I actually wrote an extension for this, which I believe should still
work:
https://addons.mozilla.org/en-US/firefox/addon/aboutaccessibilityenabled/

-David

--
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂
Re: Is your FF nightly on OSX mysteriously slow? Rob Campbell 6/5/12 6:08 AM
Also worth noting that we're receiving reports that this causes the newly-landed Debugger to close automatically with an assertion in mozAccessible.mm on the Error Console.

I've filed bug 761574[1] to track this.

~ rob

1. https://bugzilla.mozilla.org/show_bug.cgi?id=761574
Re: Is your FF nightly on OSX mysteriously slow? david bolter 6/5/12 10:39 AM
Still works for me :)

Note to all, we've turned FF mac a11y off in nightly and aurora (already
off in beta/release) while we sort things out. It sure was nice to catch
these issues in our nightly channel. Thanks everyone.

Cheers,
David