add QR Code reader in Toolbar

[Bugzilla1]

i wanted to share a idea to add QR code Reader in Firefox Toolbar, which help student like me to direct scan QR code given in PDF BOOK, which we read in Firefox, as Firefox give many things in PDF like edit,Add,etc. now i request you to please add a QR code in TOOLBAR so we can used while reading... 
as an example i uploaded a picture see 7.4.5[project Maven]

[Jon]

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