If you hear an echo then this can mean that there are two players active that are playing this file.

You can try to disable other plugins.

• https://support.mozilla.org/kb/Troubleshooting+plugins

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

There are other things that need your attention.

Please update the Java plugin because the 6U37 version that you currently use is seriously outdated and has known security vulnerabilities.

• Next Generation Java Plug-in 1.6.0_37 for Mozilla browsers
• http://www.mozilla.org/plugincheck/

I disabled every one of my plugins, one at a time, and each time the problem was still there. That is except for the shockwave flash 11.7.700.169 plugin. When I disabled it, there was nothing. A message came up saying the plugin was missing.

I also updated two plugins that firefox alerted me to.

I am now thinking I may not have accurately described the problem I'm having. The voices sound like the talkers are in a tunnel so that their voices have a ringing quality, instead of just plain voices.

Hello,

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thank you.

Well, the Reset Firefox did not solve the problem either. So, I got on Safari and watched a news video. The voices in a tunnel happened there, too! Then I tried it on Google Chrome and there also the voices are in a tunnel!

Now it seems to me that there is some setting for voice replay on my PC that is causing all this, but I am at a loss as to how or where!

Have you tried different speakers and or headphones to help rule things out?

How many plugin-container processes do you see in the Task Manager?