Feed Filter Transparency Report
Last Updated: July 2025
Technical overview of Feed Filter's data flows and privacy safeguards implemented. We value and strive to maximize the degree of data sovereignty that is possible while still delivering our user's filtered feed.
Executive Summary
| Does browsing history leave your device? | No. Only public posts you're already viewing are analyzed. |
| Is data tied to real identity? | No. After initial auth, all operations use anonymous IDs. |
| Is the code auditable? | Client-side code is viewable from the chrome download. |
Data Flow Analysis
1. Authentication (One-time)
- Google OAuth provides temporary authorization code
- Backend exchanges code for ID token (never stored)
- Anonymous user account created with random 128-bit ID
- JWT issued containing only anonymous ID + subscription status
- Google credentials immediately discarded
2. Post Analysis
Text-Only Posts:
Post text → Cloudflare Worker → OpenAI API → Filter decision
Media Posts:
Image URL → GPU Server → OCR/Caption → OpenAI API → Filter decision
3. Data Storage
- Settings and feedback stored in Firebase (Google Cloud)
- No cookies or tracking pixels
- No IP address logging (stripped by proxy)
- No cross-site tracking
- Cache stored locally in your browser only
Privacy Guarantees
What We Never Collect
- ✗ Passwords or private messages
- ✗ Precise location data
- ✗ Browser history outside supported sites
- ✗ Personal contacts or friends lists
- ✗ Device fingerprints for tracking
What We Process
- ✓ Public post content (text/images)
- ✓ Your filter preferences
- ✓ Anonymous usage metrics
- ✓ Optional feedback on decisions
- ✓ Subscription status
Security & Privacy
What the Extension Can Access
- • Page content on X and Instagram only
- • Cannot access passwords, cookies, or private messages
- • Cannot access other websites or tabs
- • Post content is sent to our servers for AI analysis
Security Measures
- • All data transmission is encrypted
- • Authentication tokens expire regularly
- • No permanent storage of your posts on our servers
- • Extension permissions strictly limited to necessary functions
Questions or Concerns?
We believe in radical transparency. If you have questions about our data practices or want to verify any claims in this report:
Email: help@feedfilter.com