I'm having trouble getting firefox to use the rear camera on my phone when scanning qr codes for a web page. The old solution appears to have been to reset Firefox's camera permissions and from there you could change which camera the app would use. However, this feature appears to have been removed as Firefox will now default to my selfie camera, which is very inconvenient. Is there an option I'm not able to see in the app or a work around for this issue? Thanks in advance for the help!