Visit your browser store to install the Rakuten extension. For Chrome and Safari, follow the additional steps to make sure the extension is ready to go.
After installing, select the puzzle piece icon in the upper-right corner of your browser toolbar to open the Extensions menu. Select the pin icon next to the Rakuten extension. You’ll now see it in your browser’s toolbar.
After installing, select Safari at the left of the top menu bar. Select Preferences and go to the Extensions tab. From the menu on the left, check the box next to Rakuten Cash Back to enable it.