Privacy Policy

Last updated 2026-04-26

StoreSwitch (“the extension”) is a Chrome extension built by 0th Canvas LLC. This policy describes what data the extension touches and what it does not.

What the extension does

When you visit a Walmart product page or your Walmart cart, the extension checks the prices for the items you’re looking at against nearby Walmart stores you’ve already configured in your Walmart account. If a nearby store is cheaper, the extension shows you the savings and lets you switch your cart’s pickup store with one click.

What data the extension reads

The extension only operates on walmart.com. While you are on Walmart, it reads:

• The product page contents (the same HTML and JSON that Walmart sends to your browser) to extract the product ID, current price, and your current pickup store.
• Your Walmart locDataV3 cookie, which contains the list of stores Walmart has already associated with your account. This is the same cookie Walmart itself uses to render the store picker. The extension uses it to know which nearby stores to compare against.
• Your Walmart cart contents on the cart and checkout pages, by observing the GraphQL responses Walmart sends to your browser. The extension uses this to compute per-item and total savings.

The extension does not read pages on any other website.

What data leaves your device

Nothing personal. The extension makes requests to walmart.com to fetch prices at other Walmart stores — these are the same product page requests you would make if you manually changed your pickup store. They use only your existing Walmart cookies, which Walmart sees from any tab you have open.

The extension does not send any data to 0th Canvas, to a third-party analytics service, or to any server we operate. There is no telemetry endpoint.

What data is stored locally

The extension stores the following in your browser’s local extension storage (chrome.storage.local). This data never leaves your device:

• A counter of feature usage (how many product pages were checked, how many switches succeeded, total dollars saved). Used to render the popup summary.
• A short-lived cache of recent cart price comparisons (so the extension doesn’t re-probe nearby stores on every page reload). Cleared automatically.
• Configuration the extension fetched from a public configuration URL (used as a kill switch if Walmart’s backend changes). Contains no user data.

You can clear all of this at any time by removing the extension or by clearing the extension’s storage in chrome://extensions.

Cookies

The extension uses Chrome’s cookies permission solely to read and temporarily rewrite your Walmart locDataV3 cookie when probing prices at nearby stores. The original cookie value is restored after each probe. The extension does not read cookies from any non-Walmart domain.

Permissions

• host_permissions: *.walmart.com — to read prices and detect cart contents on Walmart pages.
• cookies — to read/restore the Walmart store cookie during probes.
• storage — to keep the local usage counter and short-lived cache.
• scripting and tabs — to run the content script and detect when you navigate to a Walmart product page or cart.

The extension does not request any permissions beyond what is listed above.

What we do not do

• We do not sell or share your data.
• We do not use third-party analytics.
• We do not load remote code (no eval, no remote scripts).
• We do not track you across the web — the extension only activates on Walmart pages.

Contact

Questions about this policy: painter@0thcanvas.com