Extract the downloaded ZIP file to a folder on your computer. Remember where you saved it!
Go to chrome://extensions in your browser, or click Menu → Extensions → Manage Extensions.
Toggle Developer mode in the top-right corner of the extensions page.
Click Load unpacked and select the folder where you extracted the ZIP file.
The PDFling icon should now appear in your browser toolbar. Click it when viewing any PDF to send it to your Kindle!
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