Cryptocurrency firm Coinback has developed the first free browser extension, designed to help consumers earn Bitcoin while they online shop.
source https://www.google.com/url?rct=j&sa=t&url=http://www.digitaljournal.com/business/q-a-browser-extension-opens-up-bitcoin/article/532108&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFml2Ev-R-lVGtdDrSljfsXRVVndA
