Re: Mandatory advisory: when Firefox 57 lands, do NOT check "prevent accessibility services" checkbox

Gene New Zealand <hurrikennyandopo@...>

Hi gene

I downloaded the 57 beta a little while ago and found the setting he was talking about. Mine was already unchecked. I downloaded the beta of 57 and i am just looking around now.

The menus are been spoken. The quick navigation keys seem to be working etc.

There is a little lag some times when you go to the menus and or left or right arrow. I was just having a look in the options section it looks like only 4 tabs now

I have read a couple of articles so far from our stuff website and gone back and forth between pages.

as mentioned there is a little lag at times seems no worser than 56 actually at a few times seemed quicker.

Now and again you have to refresh the page as like the page does not load and using the f5 key lets it load.

Gene nz

On 10/26/2017 4:43 PM, Gene wrote:
How do you disable it if you can't work with menus and all the other structures you discussed?  Can you use the command alt t then o to get into the options dialog and can it be worked with?  Are you saying that we need to check this check box in the options dialog?
----- Original Message -----
Sent: Wednesday, October 25, 2017 10:34 PM
Subject: [nvda] Mandatory advisory: when Firefox 57 lands, do NOT check "prevent accessibility services" checkbox

Hi all,

Well, the tests ended so fast…


The following is a community-based advisory that is mandatory for you all to listen up and follow:


If Firefox 57 is set to prevent accessibility services, you won’t be able to use Firefox at all. The following NVDA features will fail:


  • Browse mode and focus mode
  • Web browser features such as elements list and first letter navigation commands
  • Object navigation and review modes
  • OCR functionality


ADVISORY: when Firefox 57 lands, DO NOT check “prevent accessibility services” checkbox in Firefox options. By default, this checkbox is unchecked.


Technical: NVDA uses mixture of code injection and accessibility API routines to access Firefox. However, when accessibility services are turned off, Firefox enters a mode where the UI and browse mode functionality will not work with screen readers. This means no announcements regarding menu bar, no toolbar navigation feedback, no feedback when you type into address bar, no browse mode and so on. The only way to restore it so far is disabling the checkbox described above until NVDA finds a way to interact with Firefox Quantum.




Check out my website for NVDA tutorials and other blindness related material at Regardless of where you are in New Zealand if you are near one of the APNK sites you can use a copy of the NVDA screen reader on one of their computers. To find out which locations (or location) is near to you please visit (Aotearoa People's Network Kaharoa). To find an NVDA certified expert near you, please visit the following link The certification page contains the official list of NVDA certified individuals from around the world, who have sat and successfully passed the NVDA expert exam.

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