Comment 1 by jteh on 2015-02-05 00:07
This is very probably something to do with Flash.

Comment 2 by briang1 on 2015-02-05 08:33
Not so sure about that. I've seen it on a lot of machines. Often if you wait after the unknown, the page then starts to read Ok, indeed I have navigational sounds add on on my Firefox and just before it really does read on there is a tiny pip noise, which has to indicate something but it never used to be there.
I find also that if the page does not start reading at all, a simple cursor press starts it off, as if its waiting for a keypress to create the buffer. I feel it could be afirefox issue. What version is being used? I have the latest beta of 36. This effect seems to be on 7 and xp, apparently randomly.
As for flash. the latest update from Adobe is quite honestly a mess. It won't install on any XP machine I have and indeed in IE8 results in no sound even if you reinstate the old version.
However Firefox just points out the fact that the old flash might be a security risk.

I can not reproduce this using NVDA Master and Firefox 54. Can anyone else reproduce this?

Neither can I. This is too old an issue and it is quite unlikely that this bug still stands. Unless we receive any feedback stating otherwise, within, let's say the next week or two, I would suggest closing. @feerrenrut

@jcsteh I think this is not reproducible in FF 60 or higher. At least I think it is not only related to firefox, see discussions in #8389.

@netblue44 are you available to help others to be able to reproduce this issue?

Somethings that might help are:

• Trying with all NVDA add-ons disabled.
• Trying with all Firefox add-ons disabled.
• The NVDA log (debug logging) when reproducing the issue.
• A screenshot of firefox right after "unknown" is announced

@netblue44 Could you please attach the information to this issue. This will help us to reproduce the issue on our own system.

1. Start NVDA with add-ons disabled.
2. Select Debug level logging from the General settings dialog
3. Start Firefox in safe-mode:
   1. Push Windows Key + R to open a run dialog
   2. Type firefox -safe-mode and press enter
4. Confirm that you hear "unknown"
5. Press Ctrl + Print Scn to take a screenshot of Firefox (we will save it in a moment)
6. Press NVDA + F1 to open the log viewer.
7. Press ctrl+s to save the log file. Put it somewhere you can find.
8. Save the screenshot from the clipboard:
   1. Open paint.exe and push ctrl+v.
   2. Press ctrl+s to save this file. Put it somewhere you can find.
9. Attach the screenshot to this issue.
10. Attach the NVDA log to this issue.

@netblue44, @dgoldfield please try to use the com registry fixing tool in nvda menu / tools and then perform the steps 1 through 10 suggested in the comment above. Are you still available to help us reproduce this issue?

We didn't get any updates from the initial author if he tried our suggestions or not. I am closing this one for now given that the discussion continues on other issues more or less related to this like #8389. If you still have this problem after trying our suggestions, plese comment on this issue and we can reopen the discussion. Thanks!