This Privacy Policy explains how the DeepBlue browser extension ("DeepBlue," "the Extension," "we," "us") handles information when you use it. DeepBlue is an independent, unofficial extension built for chat.deepseek.com and is not affiliated with, endorsed by, or sponsored by DeepSeek.
We wrote this policy to be a plain, accurate description of what the code actually does — not boilerplate. If you have technical questions, the Extension's source is available for review at [link to source, if public].
DeepBlue runs only on chat.deepseek.com.
Everything DeepBlue stores — folders, bookmarks, saved prompts, tone presets, and your language setting — is saved in your browser's local storage, on your own device.
DeepBlue does not operate any server of its own, and does not transmit your data anywhere.
DeepBlue does not sell, rent, or share your data with any third party, for any purpose, including advertising.
DeepBlue does not use analytics, tracking pixels, or any third-party telemetry service.
Because DeepBlue's features work by reading and enhancing the DeepSeek chat page you're already looking at, its code does access certain content on that page. Below is a complete account of what it touches and what it's used for.
To power search, bookmarks, exports, and the "copy as plain text" button, DeepBlue's code reads the text of messages rendered on the current chat.deepseek.com page. Specifically:
In-chat search reads message text currently on screen to find and highlight matches.
Bookmarks compute a hash of a message's text to recognize that message again later. Only the hash and your folder/label assignment are stored — not the message's full text.
Conversation and single-message export reads message text to assemble the PDF, JSON, or plain-text file you asked to download. That file is generated and saved locally to your device using your browser's own download mechanism; it is never uploaded anywhere by DeepBlue.
Copy without markdown reads a single response's content at the moment you click the button, to copy a plain-text version to your clipboard.
None of this content is transmitted off your device, logged, or retained by DeepBlue beyond what's needed to perform the action you took (e.g., the export file itself lives only on your computer once downloaded).
DeepBlue injects a small, narrowly scoped script into the page to read two numbers — a model identifier and a token-usage count — that DeepSeek's own backend already sends to your browser as part of normal chat responses. This script does not read your prompts, DeepSeek's replies, authentication tokens, or any other request or response data. These numbers are used only to display the token counter and context-window usage meter, and are not stored persistently.
The following is created by you while using DeepBlue's features and is stored in your browser's local storage, tied to the chat.deepseek.com domain:
Folder names, colors, and which conversations you've assigned to them
Bookmarked message hashes and any labels you give them
Prompts you save to the Prompt Library
Custom tone presets you create
Your selected display language, if you ever override the automatic detection
This data stays on your device. It is not synced to any account, uploaded to any server, or accessible to us or to anyone else.
To be explicit about the boundaries:
DeepBlue does not collect personally identifiable information (name, email address, phone number, etc.).
DeepBlue does not collect health, financial, or payment information.
DeepBlue does not collect authentication credentials, passwords, or security questions.
DeepBlue does not track your browsing history or activity outside chat.deepseek.com.
DeepBlue does not log keystrokes, clicks, mouse movement, or scroll behavior.
DeepBlue does not use cookies, tracking pixels, fingerprinting, or any analytics SDK.
DeepBlue does not display ads and does not share data with advertising networks.
DeepBlue does not operate a backend server, so there is nowhere for your data to be sent even if we wanted to send it.
DeepBlue requests host permission for https://chat.deepseek.com/* only. This is the narrowest permission that allows its content script to run on the DeepSeek chat page, read and enhance the page's DOM, and inject the small script described in Section 2.2. DeepBlue does not request, and cannot access, any other website, your browsing history, your bookmarks (the Chrome kind), your downloads folder contents, or any other browser data outside what's described above.
DeepBlue bundles two open-source libraries, html2canvas and jsPDF, to render PDF exports locally in your browser. These libraries run entirely on your device as part of generating your export file; they do not make network requests or transmit any data.
All data DeepBlue stores lives in your browser's local storage for the chat.deepseek.com domain. It persists there until you either:
Clear your browser's site data for chat.deepseek.com, or
Uninstall the DeepBlue extension and clear local storage through your browser's settings.
Because DeepBlue has no server, there is no copy of your data anywhere for us to delete on request — removing it from your browser removes it entirely.
Questions about this policy or DeepBlue's data practices can be sent to: a.mhamimi@outlook.com