BinectChromePrd *Product Requirements Document* # **Product Requirements Document (PRD)** ## **Project: BinectChrome** --- ## 1. Product Overview ### 1.1 Purpose **BinectChrome** is a Google Chrome extension that enables users to send PDF documents generated in arbitrary cloud applications directly to Binect for physical printing and postal delivery. It eliminates the manual **download → upload** workflow by adding a lightweight, privacy-preserving integration layer in the browser — without requiring changes to the originating application (A). --- ### 1.2 Problem Statement Users frequently generate PDF documents (letters, invoices, notices) in cloud applications that are **not integrated** with postal mail services. Today, the workflow requires: 1. Downloading the PDF from application A 2. Uploading the PDF to application B (Binect) 3. Repeating this for every document This causes friction, errors, and unnecessary time loss. --- ### 1.3 Solution Summary BinectChrome: * Detects PDF downloads (and supported in-browser PDF views) * Offers a **“Send PDF to Binect”** action * Securely transfers the PDF to Binect via its API * Requires explicit user intent * Stores no PDF content * Tracks transfers locally for transparency and support --- ## 2. Goals & Non-Goals ### 2.1 Goals * Reduce friction when sending PDFs to physical mail * Require **no integration changes** in source systems (A) * Preserve user privacy and trust * Be simple, reliable, and auditable * Minimize permissions and attack surface ### 2.2 Non-Goals * No automation or RPA of third-party websites * No shared identity or credential federation * No document content storage or analysis * No backend relay service * No multi-browser support in v1 (Chrome only) --- ## 3. Target Users * Business users producing PDFs in cloud applications * Office workers sending recurring physical mail * Compliance-conscious users who require explicit control * Chrome-based desktop workflows --- ## 4. Functional Requirements ### 4.1 PDF Detection #### 4.1.1 PDF Downloads (MUST) * Detect completed PDF downloads using Chrome Downloads API * Identification via: * `.pdf` filename extension * or response headers (`Content-Type: application/pdf`) #### 4.1.2 PDF Viewed in Browser (SHOULD) * Detect navigation to resources with `Content-Type: application/pdf` * Applies when PDFs are loaded as normal URLs **Accepted limitation:** PDFs rendered via blob URLs or complex JavaScript viewers may not be detectable or retrievable. --- ### 4.2 User Interaction & Sending #### 4.2.1 Toolbar & Popup (MUST) * Chrome toolbar icon opens popup * Popup shows: * Last detected PDF (filename, size, timestamp, source domain) * Primary action: **Send PDF to Binect** #### 4.2.2 Explicit User Intent (MUST) * PDFs are only sent after a deliberate user click * No automatic sending by default --- ### 4.3 PDF Transfer #### 4.3.1 PDF Acquisition (MUST for downloads) * Extension retrieves PDF bytes for transfer: * Prefer re-fetching from original URL using user session * Fallback mechanisms may be implemented as needed #### 4.3.2 Upload to Binect (MUST) * Transfer PDF to Binect via official API * Show clear progress and result states: * Uploading * Success * Failure (with actionable error message) --- ### 4.4 Authentication & Credential Handling #### 4.4.1 Authentication Method (MUST) * Username + password authentication to Binect API #### 4.4.2 Secure Storage (MUST) * Credentials stored encrypted at rest in extension storage * Decrypted credentials only held in memory during use #### 4.4.3 Retention Policy (MUST) * Credentials retained for **60 days since last successful use** * “Use” = successful authentication or successful send * After 60 days of inactivity: * Credentials are automatically deleted * User must re-enter credentials #### 4.4.4 Manual Controls (MUST) * User can manually wipe stored credentials at any time * Optional “Lock now” to clear decrypted credentials from memory --- ### 4.5 Privacy & Data Handling #### 4.5.1 PDF Content (MUST) * Extension never stores PDF files * Extension never reports PDF content * PDFs are only transmitted to Binect upon explicit send #### 4.5.2 Metadata Minimization (MUST) * No content inspection * No filename persistence required * Only filesize and technical metadata are tracked --- ### 4.6 Local Tracking (“Score”) #### 4.6.1 Tracking Scope (MUST) Tracking data stored **locally only**: * Timestamp * Source A identifier (URL or domain) * Destination B URL * PDF filesize * Result (success / failure + error class) #### 4.6.2 Tracking Access (MUST) * Tracking view accessible via **“?” Info/Help** link in popup * Shows: * Summary counts * Chronological list of transfers #### 4.6.3 Retention (SHOULD) * Cap number of entries (e.g. last 500 events) * Prevent unbounded growth --- ### 4.7 Feature Requests & Feedback #### 4.7.1 Feedback Mechanism (MUST) * “Request features / report issue” link * Opens email draft to: **[bernd.worsch@binect.de](mailto:bernd.worsch@binect.de)** #### 4.7.2 Tracking Export (MUST) * Tracking data prepared as CSV * CSV data: * Embedded in email body and/or * Copied to clipboard automatically * Optional “Download CSV” button **Note:** Direct file attachments via `mailto:` are not reliably supported by browsers and are therefore not required. --- ## 5. Installation & Distribution ### 5.1 Distribution Channel (MUST) * Automated publication via **Chrome Web Store** ### 5.2 Installation Requirements * Chrome browser (desktop) * User installs extension from Chrome Web Store * User grants required permissions explicitly ### 5.3 Permissions (Principle of Least Privilege) Expected permissions include: * `downloads` * `storage` * `activeTab` (optional) * Host permission for Binect API endpoint --- ## 6. Deinstallation & Cleanup ### 6.1 User-Initiated Deinstallation (MUST) * When extension is removed: * All stored credentials are deleted * All local tracking data is deleted * No data remains outside the browser ### 6.2 No External State (MUST) * No server-side state tied to installation * No orphaned accounts or tokens --- ## 7. Technical Constraints * Chrome Extension Manifest V3 * No background persistence beyond service worker lifecycle * No external backend services * No cross-browser guarantees in v1 --- ## 8. Security Considerations * Encrypted credential storage * No silent background transfers * Clear user confirmation before sending * No hidden data flows * Minimal permissions to pass Chrome Web Store review --- ## 9. Success Metrics * Reduction in manual upload steps * Successful sends per active user * Low error rate * No privacy or security incidents * Positive user feedback via feature request channel --- ## 10. Future Considerations (Out of Scope for v1) * Multi-profile destinations * Rule-based automation (opt-in) * Multi-browser support (Firefox, Edge) * Token-based authentication (if API evolves) * Organization-level deployment policies --- **BinectChrome** is intentionally modest in scope: a focused, trustworthy bridge between modern cloud software and physical mail — implemented where the user already works: the browser. xxx