1675301 - Firefox very slow on Reddit with VoiceOver and Braille enabled

Status: RESOLVED FIXED

(Core :: Disability Access APIs, defect, P1)

Description

[Marco Zehe (:MarcoZ)]

Steps:

1. Open Reddit and log in.
2. Open an article, I was using this.
3. Navigate using VO. Observations:
   • Navigating by Heading is fast.
   • Navigating by VoiceOver+RightArrow or VoiceOver+LeftArrow sequentially is very slow. It does work, but takes several seconds to go from item to item.
   • Expected: Should be fast.

Comment 1

[Eitan Isaacson [:eeejay]]

I can't reproduce this. Can you say on which two nodes, or sequence of nodes, you see lag?

Comment 2

[Eitan Isaacson [:eeejay]]

Ah! I think I found this issue. Assuming you have a braille device connected. There are certainly slowdowns when I enable braille.

Comment 3

[Marco Zehe (:MarcoZ)]

Yes, I do have a Braille display connected. Sorry, this is so second nature for me (and many other Europeans) that I sometimes forget that this could be a deciding factor.

Comment 4

[Eitan Isaacson [:eeejay]]

I worry that there is some tree corruption happening here. So I want to make this a P1 and investigate further.

Comment 5

[Marco Zehe (:MarcoZ)]

No objections from this end. I can still reproduce this reliably. I also see a much less drastic, but still profound, difference when navigating through a Gmail conversation with and without Braille. Without Braille, it's fast, with, it's laggy, but not as bad as this Reddit, but probably a similar cause.

Please let me know if I can be of any more help, since I always have a Braille display connected. I am also set up to build.

Comment 6

[Eitan Isaacson [:eeejay]]

Attachment: Bug 1675301 - Don't return web area as result when searching backwards from root group. r?morgan!

It seems that VO mistakenly thinks the web area is a descendant of itself. This causes all kinds of cyclical parent child relationships that makes VO over-query us.

This patch remedies that by not returning the web area when do an immediate child search starting from the root group - in any direction.

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/589cd0252a11
Don't return web area as result when searching backwards from root group. r=morgan

Comment 8

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/589cd0252a11

Comment 9

[BugBot [:suhaib / :marco/ :calixte]]

The patch landed in nightly and beta is affected.
:eeejay, is this bug important enough to require an uplift?
If not please set status_beta to wontfix.

For more information, please visit auto_nag documentation.

Comment 10

[Eitan Isaacson [:eeejay]]

Not worth fixing in beta.