Chrome Extension
The ItemFits Chrome extension lets you check whether a product on a retailer's page (such as Amazon, IKEA, or Wayfair) will fit through doors, up stairs, into vehicles, or in a room. To provide this feature, the extension collects and transmits the following data to our backend at itemfits.com:
• Account and authentication data. If you choose to sign in, we collect your email address. When you sign in with email and password, your password is sent over HTTPS to our authentication provider (Supabase) and is never stored inside the extension. When you sign in with Google, we use Chrome's identity API (chrome.identity.launchWebAuthFlow) to open Google's OAuth consent window and receive your email address and a session token via our authentication provider. Your Supabase session token is stored locally in the extension's chrome.storage.local so you stay signed in across popup opens.
• Product page content. When you click "Scan this page" in the extension popup, we run a one-shot content script in the active tab to extract publicly visible product attributes — title, dimensions, price, images, hyperlinks, and structured data (JSON-LD) — and send them to itemfits.com/api/extension/parse-product so our AI can identify the item and its dimensions. The extension never scans pages in the background or without your explicit click.
• Chat messages. Messages you type into the extension's chat interface are sent to itemfits.com/api/extension/chat, where they are processed by our AI provider (Anthropic, the maker of Claude) and stored so you can reference past conversations from the extension's History view.
• Scan and chat history. We store a per-user history of the products you've scanned and the chat threads you've started so you can revisit them. You can delete individual entries from the History view or request full deletion by emailing roscatoday@gmail.com.
Subprocessors used by the extension. We share the data above with a limited number of service providers strictly to deliver the extension's single purpose:
• Supabase — database and authentication. Stores your account, sessions, scan history, and chat transcripts.
• Anthropic (maker of Claude) — AI model provider. Processes chat messages and scanned product data to generate fit assessments. Per Anthropic's commercial terms, data sent via its API is not used to train Anthropic's models.
• Stripe — payment processing for premium tier purchases made on itemfits.com. The extension itself does not handle payment information; if you purchase a paid plan, you do so on the web app and Stripe processes the transaction on our behalf. The extension never sees card numbers or banking details.
These providers are contractually bound to use the data only to deliver services to ItemFits.
What the extension does NOT collect. The extension does not track your browsing history outside of pages you explicitly scan. It does not monitor your clicks, keystrokes, mouse movements, or scroll position. It does not read form fields. It does not access your location, camera, microphone, or files. It does not inject scripts into pages you haven't asked it to scan. It does not sell, rent, or share your data with advertisers or data brokers, and it does not use your data for purposes unrelated to checking whether an item fits in a space.