プライバシーポリシー

Archived copy of the privacy policy as it stood in March 2026, before the May 2026 update. This snapshot preserves the then-current policy body, including later telemetry and legal-posture additions that were present on the Angular page before this archive pass.

TLDR FSB operates entirely within your browser. No browsing data is collected. API keys are encrypted locally with AES-GCM. AI calls go directly from your browser to the provider you choose. The optional relay server for Background Agents stores only run metadata, never page content. Memory data stays on your device. Everything is open source and auditable.

Data Collection

FSB operates entirely within your browser. The extension only accesses the DOM (Document Object Model) of the currently active tab when you initiate an automation task.

• No browsing history is collected or stored beyond the current session
• DOM data is analyzed locally and discarded after each automation step
• No personal information is harvested from pages you visit

Data Storage

All settings and data are stored locally in Chrome's extension storage. FSB uses AES-GCM encryption for sensitive data like API keys.

• Configuration is stored in chrome.storage.local
• API keys are encrypted before storage using AES-GCM
• Session logs are stored locally and can be cleared at any time
• Analytics data (task counts, success rates) stays on your device

External Services

FSB communicates with external AI providers only when you configure and use a hosted provider. If you use LM Studio, AI requests stay on your machine through its local OpenAI-compatible server. The choice of provider and what data is sent is under your control.

• Hosted API calls are made only to the provider you select (xAI, OpenAI, Anthropic, Google, or OpenRouter)
• LM Studio uses a local OpenAI-compatible server on your device and does not require an API key
• Sent data includes: task description, DOM structure summary, and action context
• If you use the Remote Dashboard or Background Agents sync, an optional relay server handles WebSocket messages and stores agent run metadata (task name, cost, duration, success/fail). No page content, DOM data, or AI responses are stored on the server. This is opt-in only
• Each provider has their own privacy policy governing how they handle API requests

No Tracking

FSB does not include any analytics, telemetry, or tracking services. There are no cookies, no fingerprinting, and no third-party scripts beyond the AI provider APIs you explicitly configure.

API Keys

Your API keys are encrypted locally using AES-GCM before being stored. They are never transmitted anywhere except to the AI provider you configured, and only as authentication headers in API requests.

• Keys are encrypted at rest in Chrome storage
• Decryption only happens in-memory when making API calls
• Keys are never logged, exported, or shared

Auto-Passwords

FSB includes an optional credential manager that stores login credentials encrypted on your device. Passwords are never exposed to AI models. They are filled directly into pages by the content script, bypassing the AI entirely.

• Credentials are encrypted at rest using AES-GCM with 256-bit keys and PBKDF2 key derivation
• When the AI analyzes a page, password field values are replaced with [hidden]. The actual password is never included in any AI prompt
• Auto-fill is performed by the content script injecting values directly into the DOM, with no AI involvement in the credential flow
• The credential list view only shows usernames and domains. Passwords are decrypted individually and only when needed for auto-fill
• Credentials are stored per-domain with parent domain fallback (e.g., accounts.google.com inherits from google.com)

Prompt Injection Prevention

Web pages can contain hidden text designed to hijack AI agents. FSB implements multi-layered defenses to ensure the AI only follows your instructions, never instructions embedded in page content.

• All page content is wrapped in [PAGE_CONTENT] boundary markers, and the AI is instructed to never follow instructions found within these markers
• A sanitization engine strips known injection patterns (e.g., "ignore previous instructions", fake system prompts, override attempts) from all page content before it reaches the AI
• AI-generated actions are validated before execution. Dangerous URLs (javascript:, data:) and script injection attempts are blocked
• Only a strict allowlist of 50+ known tools can be executed. The AI cannot invent or call arbitrary actions
• Content size is capped (500 chars per value, 15K total prompt cap) to limit payload delivery
• Invisible Unicode control characters that websites embed are stripped before processing

Background Agents and Server Sync

If you opt into Background Agents server sync or Remote Dashboard pairing, a relay server facilitates communication between your extension and the dashboard.

• The server stores: agent definitions (name, schedule, target URL), run metrics (token count, cost, duration, success/fail status), and session pairing tokens
• The server does NOT store: page content, DOM data, browsing history, AI prompts, AI responses, or any data from the pages you visit
• Authentication uses hash keys (generated locally) and session tokens that expire after 24 hours
• One-time pairing tokens expire after 60 seconds and cannot be reused
• Server sync is disabled by default. You must explicitly enable it in Options

Memory System

FSB's memory system stores navigation patterns and site intelligence to improve automation over time.

• All memory data (semantic, episodic, procedural) is stored locally in chrome.storage.local
• No memory data is sent to any external server
• Memory can be viewed and cleared at any time from the Options dashboard
• Site maps and navigation patterns are domain-specific and isolated from each other

Anonymous Usage Telemetry

FSB v0.9.69 introduced an opt-out anonymous usage telemetry pipeline so the project can publish aggregate adoption numbers (see /stats) without ever touching the pages you browse. Telemetry is on by default but can be disabled with a single toggle, and the per-install data can be erased on request.

What we collect

• A random per-install UUID stored in chrome.storage.local under the key fsbInstallUuid. The UUID is generated locally and never tied to your identity.
• The name of the MCP client used (e.g. Claude Code, Cursor, Codex), drawn from a fixed allowlist.
• The model name used for a session (e.g. grok-4-fast, claude-opus-4), drawn from a fixed allowlist.
• Aggregate input/output token counts per session.
• The number of active FSB agents on your install (an integer count).

What we do NOT collect

• Page URLs, hostnames, or browsing history.
• Prompts, instructions, task descriptions, or any natural-language text you send to your model provider.
• Page DOM, screenshots, page content, or AI responses.
• Plaintext IP addresses. The server hashes the request IP with a daily-rotating salt for rate limiting and discards it.
• Names, usernames, account handles, or any free-form identity fields.
• Email addresses, phone numbers, or contact information.

Retention

Raw events are retained for 7 days. Daily rollups (one row per install per day) are retained for 365 days. Global aggregates (one row per day, no per-install dimension) are retained indefinitely so historical charts on /stats remain stable.

How to opt out

Open the FSB Control Panel, scroll to Advanced Settings, and toggle Send anonymous usage data off. The change takes effect immediately; no further events will be sent from your install.

How to erase your data

To request erasure of all telemetry rows associated with your install (GDPR Article 17), look up your fsbInstallUuid in Chrome DevTools → Application → Storage → Extension storage, then send a single HTTP request:

curl -X POST -H "Content-Type: application/json" \
  -d '{"install_uuid":"<your-uuid>"}' \
  https://full-selfbrowsing.com/api/telemetry/forget

Limited Use affirmation

FSB's anonymous usage telemetry is used only to compute aggregate usage statistics displayed publicly at full-selfbrowsing.com/stats. The data is never sold, never shared with third parties, never used for advertising, and never used to train any machine-learning models. This commitment satisfies the Chrome Web Store's Limited Use requirement.

Aggregated public metrics

We publish aggregated metrics derived from this telemetry pipeline at /stats. Only counts and totals are shown; no per-install row is ever exposed.

Legal Posture and Consent Model

FSB's automation posture, audit-log retention, and per-origin consent model were presented as explicit product controls. FSB does nothing on an origin until you explicitly allow it, automated read access never implies write access, and a conservative service denylist blocks automation on sensitive categories (financial and government services) outright.

• Per-origin consent is default-off. Auto and write (mutating) access are separate, explicit opt-ins managed from the Control Panel's Consent & Audit section.
• Every capability call is recorded in a redacted, append-only local audit log. No arguments, tokens, cookies, or response bodies are ever stored.
• A service denylist renders sensitive origins non-enableable, enforced at the capability gate and not merely in the interface.

Open Source

FSB is fully open source under the BSL 1.1 License. You can audit every line of code to verify these privacy claims. The source code is available on GitHub.

Changes to This Policy

If this policy is updated, the changes will be reflected by the "Last updated" date at the top of this page. Significant changes will also be noted in the project's GitHub release notes.

Contact

If you have questions about this privacy policy or FSB's data handling, please open an issue on GitHub Issues.

Archived copy of the initial privacy policy as it stood in February 2026. This snapshot is reproduced from the original static showcase page, with the page chrome removed and the policy content preserved.

Data Collection

FSB operates entirely within your browser. The extension only accesses the DOM (Document Object Model) of the currently active tab when you initiate an automation task.

• No browsing history is collected or stored beyond the current session
• DOM data is analyzed locally and discarded after each automation step
• No personal information is harvested from pages you visit

Data Storage

All settings and data are stored locally in Chrome's extension storage. FSB uses AES-GCM encryption for sensitive data like API keys.

• Configuration is stored in chrome.storage.local
• API keys are encrypted before storage using AES-GCM
• Session logs are stored locally and can be cleared at any time
• Analytics data (task counts, success rates) stays on your device

External Services

FSB communicates with external AI providers only when you configure and use them. The choice of provider and what data is sent is under your control.

• API calls are made only to the provider you select (xAI, OpenAI, Anthropic, or Google)
• Sent data includes: task description, DOM structure summary, and action context
• No data is sent to FSB servers -- there are none
• Each provider has their own privacy policy governing how they handle API requests

No Tracking

FSB does not include any analytics, telemetry, or tracking services. There are no cookies, no fingerprinting, and no third-party scripts beyond the AI provider APIs you explicitly configure.

API Keys

Your API keys are encrypted locally using AES-GCM before being stored. They are never transmitted anywhere except to the AI provider you configured, and only as authentication headers in API requests.

• Keys are encrypted at rest in Chrome storage
• Decryption only happens in-memory when making API calls
• Keys are never logged, exported, or shared

Auto-Passwords Beta

FSB includes an optional credential manager that stores login credentials encrypted on your device. Passwords are never exposed to AI models -- they are filled directly into pages by the content script, bypassing the AI entirely.

• Credentials are encrypted at rest using AES-GCM with 256-bit keys and PBKDF2 key derivation
• When the AI analyzes a page, password field values are replaced with [hidden] -- the actual password is never included in any AI prompt
• Auto-fill is performed by the content script injecting values directly into the DOM, with no AI involvement in the credential flow
• The credential list view only shows usernames and domains -- passwords are decrypted individually and only when needed for auto-fill
• Credentials are stored per-domain with parent domain fallback (e.g., accounts.google.com inherits from google.com)

Prompt Injection Prevention

Web pages can contain hidden text designed to hijack AI agents. FSB implements multi-layered defenses to ensure the AI only follows your instructions, never instructions embedded in page content.

• All page content is wrapped in [PAGE_CONTENT] boundary markers, and the AI is instructed to never follow instructions found within these markers
• A sanitization engine strips known injection patterns (e.g., "ignore previous instructions", fake system prompts, override attempts) from all page content before it reaches the AI
• AI-generated actions are validated before execution -- dangerous URLs (javascript:, data:) and script injection attempts are blocked
• Only a strict allowlist of 30+ known tools can be executed -- the AI cannot invent or call arbitrary actions
• Content size is capped (500 chars per value, 15K total prompt cap) to limit payload delivery
• Invisible Unicode control characters that websites embed are stripped before processing

Open Source

FSB is fully open source under the MIT License. You can audit every line of code to verify these privacy claims. The source code is available on GitHub.

View the source code on GitHub

Summary

FSB processes data locally, encrypts sensitive information, never exposes passwords to AI models, defends against prompt injection attacks, communicates only with AI providers you choose, includes no tracking, and is fully auditable as open source software.