Last updated: February 3, 2026
Applies to:
- CSS Copy Tool
- WhatsApp Contacts Exporter
- Substack Notes Scheduler
These browser extensions are developed by dlcsouza. We are committed to protecting your privacy. None of our extensions collect, transmit, or store any user data externally.
We do NOT collect any data. Specifically:
- ❌ No personal information is collected
- ❌ No browsing history is tracked
- ❌ No analytics or telemetry is used
- ❌ No data is sent to external servers
- ❌ No cookies are used
- ❌ No accounts are required
- ❌ No remote code is executed
Our extensions may store user preferences locally using Chrome's storage API (e.g., output format settings, filter preferences). This data:
- Never leaves your device
- Is not accessible to us or any third party
- Can be cleared by uninstalling the extension
Reads CSS properties from webpage elements when you activate the inspector. Data is copied to your clipboard and never transmitted anywhere.
Reads contact names and phone numbers from WhatsApp Web's DOM. Exports are generated locally and downloaded directly to your device. No contact data is ever sent to any server.
Stores your scheduled notes locally in Chrome storage. Notes are posted directly to Substack through your authenticated browser session. We never see or store your content.
Each extension requests only the minimum permissions required to function:
| Permission | Purpose |
|---|---|
| activeTab | Access current tab when user activates the extension |
| scripting | Inject content scripts to read page data |
| storage | Save user preferences locally |
| clipboardWrite | Copy data to clipboard (CSS Copy Tool) |
| alarms | Schedule notes (Substack Scheduler) |
| notifications | Notify when notes are posted (Substack Scheduler) |
| host_permissions | Access specific sites (WhatsApp Web, Substack) |
We do NOT share, sell, or transfer any data to third parties. There are no third-party scripts, SDKs, analytics, or services in our extensions.
Our extensions do not contain obfuscated or minified code. All functionality runs locally in your browser with no hidden behaviors.
If this policy changes, we will update this document with a new date.
For questions about this privacy policy:
📧 dlcsouza@github.com
All extensions by dlcsouza are privacy-first. Your data stays on your device.