Best Offline QR Code Generator for Firefox Rated 5 out of 5 stars
Perfect if all you want is client-side QR code generation to send a website to a phone or tablet quickly and privately.
Image saving could be useful but you can always use Print Screen or another image capture method. Alternatively you can generate and save QR Codes by using a Windows software named "XRen QRCode" which is free too.
Image save functionality added in v0.9.1
The latest addon is still up for review. Brave hearts can download it at https://addons.mozilla.org/en-US/firefox/addon/offline-qr-generator/versions/