How can I scan barcodes on webpages in Firefox for Android?

Using Firefox for Android, I occasionally find web pages containing barcode images (or photos containing barcodes) that I would like to scan. I could save the image, switch to a barcode app, open and scan the image there, and probably end up relaunching the browser to see the result, but I'd *prefer* to long hold the image and launch the scanning app directly (with no save step required). Is there an open source extension (Android app, Firefox add-on, Firefox app) that can achieve this? I've tried looking on the Firefox add-ons and apps marketplaces with no luck. Example images: * f-droid.org (rendered image, imperfect QR code) * cryptojunky.com (photo, imperfect QR code) * wikimedia.org (rendered Aztec code)