HST Gross-Up for Amazon.ca

About

Amazon shows pre-tax prices while you browse, and the tax only shows up at the
very end of checkout. HST Gross-Up for Amazon.ca folds the tax back into the
prices up front, so the number you see reflects roughly what you'll actually pay.

Grossed-up prices are recoloured (teal) and tagged with a small "w/HST" label,
so it's always obvious which numbers the extension has changed.

Features:
• Adds 13% Ontario HST to prices across amazon.ca — search results, product
  pages, the cart, and the cart side-sheet.
• Clearly marks every modified price (teal colour + "w/HST" tag).
• Handles Amazon's different price layouts and prices that load as you scroll.
• Runs only on amazon.ca. It does nothing on any other website.

Please note:
• This is an estimate for convenience, not an official tax calculation. It
  applies a flat 13% to every price and does not try to detect items that are
  tax-exempt or taxed differently. It assumes Ontario (13% HST).
• Not affiliated with, endorsed by, or sponsored by Amazon.

Privacy: this extension collects no data of any kind. Everything happens locally
in your browser; it makes no network requests and contacts no servers.

Open source: https://github.com/perryfardella/amazon-ca-hst-gross-up