Hi Yuhara,
first of all, thanks for your rating. It's great to hear that you like the add-on. 😀

The feature you requested (a common context menu entry for generating the QR code) is actually already implemented by a contributor in https://github.com/rugk/offline-qr-code/pull/336 and will be released in the future. Thanks for your suggestion, in any case!

If you want to find more information on how to support us, have a look at https://github.com/rugk/awesome-emoji-picker/blob/master/CONTRIBUTING.md#support-us. Thanks. 😃

Best regards,
rugk