MoMo QR Decoder by 莫莫先生

momoQRdecoder is a Firefox extension that lets you quickly decode QR codes visible on the screen while browsing — no need to grab your phone.

Features:
- Instant Scan: capture the current page with one click and decode all QR codes found
- Delayed Scan: automatically scan 3 seconds later, for QR codes that only appear on hover
- Region Capture: select any area of the page to decode
- Multiple Codes: recognize several QR codes on the same screen and flag duplicates
- Easy Actions: copy results with one click, open URLs directly in a new tab
- Dual Engine: built-in jsQR and WeChat QRCode (OpenCV) engines, even supports decorative/artistic QR codes

Privacy: all screenshots and decoding happen locally in your browser (WASM). No data is uploaded to any server and no personal information is collected. Nothing is persisted to storage.

Compatibility: requires Firefox 154 or later. Automatically falls back to a single engine on older browsers.