Looking around, it seems like firefox uses the default webcam set in windows preferences, and there isn't a way to switch it on the fly, unfortunately. It would definitely be more ideal if you could just click a dropdown and select a different webcam....

I think that if you revoke the current permission via the padlock drop-down list that you should get a new request for allow the webcam and be able to select a different device, possibly after reloading the page.

I also wish to use an external webcam in Firefox for meetings online.

I am trying to use an Elgato Capture HD60S+ as a webcam on https://blackboard.umbc.edu, but when turning on video Firefox only prompts for the integrated webcam, the drop down arrow does not show any other options.

Revoking permissions did not work.

When I look in the Control Panel\Hardware and Sound\Devices and Printers, when I right-click on the Capture HD60S+ the option to set a default webcam is not listed; nor is there an option to set a default camera when using Device Manager -> Cameras.

However, in Chrome I am able to use the Capture HD60S+ as a webcam.

Any light that can be shed on this problem would be helpful.