Each of those Browser uses different flash version so you should see and install the latest Flash to see what happens. Otherwise you need to contact Adobe support for flash problems.

There is no live support for adobe flash player

It's normal for a user to need to give a site permission to use the Flash plugin. To bypass that, you can make a change on the Add-ons page. Either:

• Command+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Plugins.

On the right side, find "Shockwave Flash" and change "Ask to Activate" to "Always Activate".

When you reload the problem page and try to access your camera/microphone, you should now get whatever permission prompt the Flash plugin presents, without first having to interact with Firefox's permission prompt.

Any improvement?

If not, could you test in Firefox's Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem. Flash still runs.

If Firefox is not running: Hold down the option/alt key when starting Firefox. (On Windows, hold down the Shift key instead of option/alt.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" button > Restart with Add-ons Disabled
• Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

Do you know whether this issue occurs on other platforms or only on MacOS?

Someone at Canvas figured it out... I think we did Firefox Safe mode and it fixed it! thanks for the help...

Okay, check whether it's one of the extensions.

If not, it could be an incompatibility with your graphics card/chipset driver software. You can temporarily disable hardware acceleration in normal mode (see: Firefox's performance settings) and check for updates (see: Upgrade your graphics drivers to use hardware acceleration and WebGL).