Purpose & scope of the extension
Lanmma is a Chrome browser extension developed by Mohamed Saeed. Its primary purpose is to help users learn languages naturally across the web by clicking any word in YouTube video captions or selecting text on any webpage to receive instant AI-powered translation, deep dive contextual analysis, synonyms, usage examples, and pronunciation.
This Privacy Policy applies to the Lanmma Extension. By installing or using the Extension, you agree to the practices described in this policy.
What information the extension accesses or stores
| Data type | Collected? | Details |
|---|---|---|
| Personal information (name, email, address) |
✗ No | We do not collect any personally identifiable information. No account creation is required to use the Extension. |
| Browsing history | ✗ No |
The Extension does not store or transmit your browsing history.
It reads the URL of the currently active tab only to detect whether you are
on a YouTube watch page (youtube.com/watch) or to save the source URL and title of the text you analyze
for your local vocabulary library. This check is performed locally — no browsing history is ever sent anywhere.
|
| API Keys (user-provided) | ✓ Yes |
Your Google Gemini or Groq API key (required) and ElevenLabs API key (optional) are stored
locally using Chrome's chrome.storage.local API.
The AI provider keys can also be saved automatically if you use the optional Auto Setup
feature — captured at the exact moment you click "Copy Key" in Google AI Studio or Groq Console
and saved directly to local storage without ever passing through any server.
These keys are never transmitted to the developer or any third party
other than the respective API services when you actively request an analysis.
|
| User preferences & saved words | ✓ Yes |
Your settings (language, theme, performance mode) and your saved vocabulary library
(word, translation, video reference, timestamp) are stored locally using
chrome.storage.local. This data never leaves your device.
|
| Selected text & contextual excerpts | Processed | When you click a word in YouTube captions or use the Universal Selection feature on any webpage, the text and a short surrounding excerpt (up to ~5,000 characters) are sent to your selected AI provider (Google Gemini or Groq) for analysis. This data is sent solely to generate a response and is subject to their respective Google Terms or Groq Terms. The developer does not receive or store this data. |
| Usage / analytics data | ✗ No | We do not collect any analytics, crash reports, or usage statistics. |
| Payment data | ✗ No | The Extension is free and does not process any payments. |
Purposes for processing any collected information
Any data that is stored or processed is used only for the following purposes:
We explicitly do not:
Chrome extension manifest permissions explained
Lanmma requests only the permissions strictly required for its core functionality.
Below is a plain-language explanation of every permission in our
manifest.json.
activeTabRequired for the Universal Selection feature to read the text you select on any webpage so it can be analyzed. It only activates on the current tab when you explicitly select text or use the extension.
storage
Used to save your API keys, selected language, theme, performance mode,
and saved vocabulary library locally in your browser via
chrome.storage.local. No data is sent to any server.
https://www.youtube.com/*Required to inject the caption overlay and intercept YouTube's subtitle network requests so the transcript can be read and synchronized locally. No YouTube data is transmitted to external servers by Lanmma.
https://generativelanguage.googleapis.com/*https://api.groq.com/*Required to send word analysis and translation requests directly from your browser to your selected AI provider (Google Gemini or Groq) using your own API key.
https://api.elevenlabs.io/*Required for the optional premium text-to-speech feature. Only used if you provide an ElevenLabs API key and trigger audio playback.
https://translate.google.com/*Used as a free text-to-speech fallback when ElevenLabs is not configured. Only the spoken word is sent; no browsing data is included.
https://aistudio.google.com/*https://console.groq.com/*
Used exclusively for the optional Auto Setup feature.
The Extension is inactive on these pages unless you initiate setup via the onboarding.
It activates only when the URL contains ?lanmma_setup=true, then it
shows a guide arrow and — only when you click the "Copy Key" button — reads your
newly created key directly from the page and saves it to local storage.
The tab is closed automatically 3.5 seconds after the key is captured.
navigator.hardwareConcurrency (CPU core count) locally and one-time only,
to automatically enable a Low Performance Mode on weaker devices for a smoother UI.
This value is never stored, transmitted, or used for fingerprinting.
External tools and services we integrate with
Lanmma integrates with the following external API services. Each service receives only the minimum data required for its specific function, and none of these are used for analytics, advertising, or tracking:
| Service | Purpose | Data sent | Required? | Their policy |
|---|---|---|---|---|
| Google Gemini or Groq API | AI word analysis & sentence translation | Selected text + surrounding excerpt (~5,000 chars max) + your chosen language. Sent using your own API key. | Required | Google ↗ | Groq ↗ |
| ElevenLabs API | Premium text-to-speech pronunciation | The word or sentence to be spoken. Sent using your own ElevenLabs API key. | Optional | View ↗ |
| Google Translate TTS | Free text-to-speech fallback (when ElevenLabs is not configured) | The word or sentence to be spoken. No API key required. | Fallback | View ↗ |
| Google AI Studio & Groq Console | One-time optional Auto Setup — guides you through creating an API key | No data is sent to these sites by Lanmma. The Extension activates only when you initiate the setup and reads the key solely at the moment you click "Copy Key", saving it directly to your local extension storage. | Optional | Google ↗ | Groq ↗ |
Where your data lives and how it's protected
All user preferences are stored locally on your device using Chrome's
chrome.storage.local API. This data is managed by Chrome and subject to
Chrome's own security model. It is automatically deleted when you uninstall the Extension.
API calls to Google Gemini, Groq, and ElevenLabs are made over HTTPS directly from your browser.
Your API keys are stored in chrome.storage.local, which is sandboxed to the
Extension and inaccessible to websites or other extensions.
If you discover a security vulnerability, please contact us at
mohamed.saeed162005@gmail.com.
chrome://extensions → Lanmma → Clear data).
Since we operate no backend, there is no server-side data to delete.
Control over your data (GDPR, CCPA & general)
Regardless of your location, you have the following rights regarding your data:
If you are located in the European Economic Area (EEA), you also have the right to lodge a complaint with your local data protection authority.
For any privacy-related questions, contact us at mohamed.saeed162005@gmail.com. We will respond within 30 days.
COPPA compliance
The Extension is not directed to children under the age of 13 (or 16 in the EEA). We do not knowingly collect personal information from children.
If you are a parent or guardian and believe your child has provided personal information through the Extension, please contact us at mohamed.saeed162005@gmail.com and we will promptly delete such information.
How we notify you of updates
We may update this Privacy Policy from time to time to reflect changes in the Extension, legal requirements, or our practices. When we do:
Your continued use of the Extension after a policy update constitutes your acceptance of the revised policy. If you do not agree, please uninstall the Extension.
Questions, requests, and concerns
If you have any questions, concerns, or requests regarding this Privacy Policy or the Extension's data practices, please reach out:
Developer
Mohamed Saeed
Email
mohamed.saeed162005@gmail.com
GitHub
github.com/MoSaeed450
Country / Region
Egypt