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better-deepseek
A powerful browser extension that supercharges DeepSeek Chat with custom tooling, persistent memory, and seamless project scaffolding. Generate and download files, run Python in-browser, create PowerPoint and Excel documents, build multi-file projects as ZIP archives, and manage custom skills and characters.
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README preview
Better DeepSeek
Better DeepSeek is a browser extension that enhances the DeepSeek chat interface with a powerful set of tools, persistent memory, and a customizable system prompt. It enables DeepSeek to generate files, run code, create presentations, and manage complex projects directly within the conversation, all while keeping your data local and private.
"Better DeepSeek" is an unofficial, independent, and community-driven open-source extension. It is NOT affiliated with, endorsed by, sponsored by, or officially connected to DeepSeek or DeepSeek AI in any way. All product names, logos, and brands are property of their respective owners.
Showcase
Features
Hidden System Prompt
Inject a custom system prompt that guides DeepSeek's behavior without cluttering the chat. The prompt is automatically injected into every conversation and can be edited from the extension's settings panel.
Tool Tags for Enhanced Output
Better DeepSeek introduces a set of special tags that DeepSeek can use to produce rich, interactive content:
<BDS:HTML>...</BDS:HTML> – Render a full HTML document in a preview card.
<BDS:VISUALIZER>...</BDS:VISUALIZER> – Create high-contrast, monochrome simulations and interactive diagrams using a built-in UI kit.
<BDS:create_file fileName="path/to/file.ext">...</BDS:create_file> – Generate a downloadable file with the specified name and content.
<BDS:pptx>...</BDS:pptx> – Generate a PowerPoint presentation using the PptxGenJS library.
<BDS:excel>...</BDS:excel> – Generate an Excel spreadsheet using SheetJS.
<BDS:docx>...</BDS:docx> – Generate a Word document using the docx library.
<BDS:AUTO:REQUEST_WEB_FETCH>url</BDS:AUTO:REQUEST_WEB_FETCH> – Automatically fetch and convert a web page to markdown, then inject it into the chat context.
<BDS:AUTO:REQUEST_GITHUB_FETCH>url</BDS:AUTO:REQUEST_GITHUB_FETCH> – Automatically fetch a GitHub repository and inject its codebase into the chat context.
<BDS:memory_write>key: value, importance: always|called</BDS:memory_write> – Store persistent facts about the user that are injected into future prompts.
<BDS:character_create name="..." usage="...">...</BDS:character_create> – Define a roleplay persona that DeepSeek can adopt.
LONG_WORK Project Mode
When building multi-file projects, DeepSeek can use the <BDS:LONG_WORK> tag. All files created inside this block are collected, zipped, and presented as a single download after the block closes. During generation, the user sees only a "Working..." indicator, keeping the chat clean.
Persistent Memory and Skills
Memory: Store key-value facts about the user. "Always" memories are included in every request; "called" memories appear only when their key is mentioned.
Skills: Upload markdown files that define custom instructions or behaviors. Skills can be toggled on and off from the drawer.
Characters: Create and manage roleplay personas. Only one character can be active at a time.
Voice Support (STT & TTS)
Better DeepSeek now supports full voice interaction:
Voice-to-Text: Dictate your prompts using the microphone button next to the chat input. Supports optional auto-submission for a hands-free experience.
Text-to-Speech: Assistant responses can be automatically read aloud once generation is complete.
Language Selection: Configure your preferred voice and recognition language directly from the extension settings.
Native Navigation
The DeepSeek logo and "New Chat" button have been transformed into native links, allowing for standard browser interactions such as "Open in New Tab" via right-click or Ctrl/Cmd+Click.
User Interface
A sleek drawer slides out from a floating button on the DeepSeek page. Inside you can:
Edit the system prompt.
Toggle auto-download behavior for files and LONG_WORK zips.
Import, export, and manage skills.
Import, export, and manage memory entries.
Create, edit, and activate characters.
Define Claude-style Projects, define project-level instructions, and upload project files and attach them to chats.
Code Block Download Buttons
Every code block in DeepSeek responses gains a "Download" button, making it easy to save snippets with the correct file extension.
Advanced File Upload
The extension adds a "+" button next to the chat input, offering:
Upload a folder (concatenates all text files into a single workspace file).
Import a GitHub repository (fetches and packages the repo as a text file, with optional GitHub token support for private repositories).
Fetch a web page (converts the main content to markdown).
Installation
Recommended: Browser Stores
The easiest way to install Better DeepSeek is through the official stores:
If you want to try the very latest features before they reach the store, you can download the Latest Automated Build. Download the ZIP for browsers, or the signed APK for Android. Load the browser extension via "Load unpacked" in Chrome.
Manual Installation (Developer Mode)
If you prefer to build from source or contribute to development:
Prerequisites
Node.js (version 18 or later)
npm
Build from Source
Clone the repository:
git clone https://github.com/EdgeTypE/better-deepseek.git
cd better-deepseek
Install dependencies:
npm install
Build the extension:
npm run build
This will create a dist-chrome and dist-firefox folder with the unpacked extension.
Load the extension in your browser:
Chrome:
Open Chrome and go to chrome://extensions.
Enable "Developer mode" (top-right toggle).
Click "Load unpacked" and select the dist-chrome folder.
Firefox:
Open Firefox and go to about:debugging.
Click "This Firefox".
Click "Load Temporary Add-on".
Select the better-deepseek-firefox.zip file.
Note: Firefox build is experimental.
The extension should now appear in your extensions list and be active on chat.deepseek.com.
Usage
Once installed, visit chat.deepseek.com. You will see a "BDS" button in the top-right corner. Click it to open the settings drawer.
Using Tool Tags
Simply ask DeepSeek to perform a task that would benefit from one of the tools. For example:
"Create a Python script that calculates the Fibonacci sequence and run it."
"Make an interactive pendulum simulation."
"Generate a PowerPoint presentation about climate change."
"Build a complete React to-do app as a downloadable project."
DeepSeek will use the appropriate tags automatically (guided by the injected system prompt).
Managing Memory
When DeepSeek writes to memory using <BDS:memory_write>, the entries appear in the "Stored Memory" section of the drawer. You can also manually import/export memory as JSON.
Uploading Folders and GitHub Repos
Click the "+" button next to the chat input to reveal the advanced upload menu. Choose "Upload Folder" to select a local directory; the extension will concatenate all text files into a single upload. On browsers without the File System Access API (Firefox), the folder picker falls back to the browser's native directory input so the flow still works. "GitHub Repo" fetches the repository as a ZIP and converts it to a gitingest-style text file for context.
For private repositories, add a classic GitHub personal access token with repo scope in Advanced Settings. The token is stored locally in the extension and is only sent to GitHub when you explicitly fetch a repository.
