Searching for a DeepSeek browser extension turns up dozens of results, but none of them is made by DeepSeek. The company offers its assistant on its website and in its mobile apps, not as an official Chrome add-on. Some of the extensions that use its name have turned out to be traps that copy users’ conversations. This guide explains the safe ways to use DeepSeek in Chrome and Edge, and how to check an AI extension before you install it.
Note: an earlier version of this page recommended an Edge extension that is no longer available in the store. We have replaced that advice with the options below.
Is there an official DeepSeek browser extension?
No. As of September 2026, DeepSeek’s official products are the web chat at chat.deepseek.com, its mobile apps and its developer API. Any Chrome or Edge extension with “DeepSeek” in its name comes from an independent developer, however official its icon looks.
Why fake DeepSeek extensions are a real risk
In January 2026 security researchers found two Chrome extensions, “Chat GPT for Chrome with GPT-5, Claude Sonnet & DeepSeek AI” and “AI Sidebar with Deepseek, ChatGPT, Claude, and more”, with over 900,000 users combined, that were sending people’s AI conversations and browsing activity to their operators. Google removed them from the Chrome Web Store, but removal from the store does not uninstall them from your browser.
Safe ways to use DeepSeek in your browser
| Method | How | Risk |
|---|---|---|
| Website | Open chat.deepseek.com and pin the tab | Lowest: nothing extra installed |
| Installed web app in Chrome | Menu > Cast, save and share > Install page as app | Low: it is still DeepSeek’s own site |
| Installed web app in Edge | Menu > Apps > Install this site as an app | Low |
| Third-party extension | Chrome Web Store | Depends entirely on the developer |
An installed web app gives DeepSeek its own window and taskbar icon, which covers most of what people want from an extension, without giving any third party access to your pages.
How to check an AI extension before installing it
- Look at the publisher. A real company name, website and privacy policy are the minimum.
- Read the permissions. “Read and change all your data on all websites” is a lot to hand over to an AI sidebar.
- Read recent reviews, not just the star rating, and look for complaints about redirects or new tabs opening.
- Prefer open-source projects whose code anyone can inspect.
- Never paste passwords, API keys or confidential work into any AI chat opened through a third-party add-on.
How do I remove a suspicious extension?
- Open chrome://extensions (or edge://extensions in Edge).
- Click Remove under the extension and confirm.
- Change the passwords of accounts you used while it was installed, and review your AI chat history for anything sensitive.
Frequently asked questions
Is DeepSeek free to use?
The web chat and the mobile apps are free to use with an account. The developer API is paid per use.
Can I use DeepSeek in a sidebar?
Only through a third-party extension. If you choose one, vet it with the checklist above, or use the installed web app in a window next to your browser instead.
Is it safe to share work documents with DeepSeek?
Treat any AI chat as a service run by someone else. Check your employer’s rules first, and read DeepSeek’s privacy policy for where data is stored before sharing anything confidential.
The safest DeepSeek browser extension is often no extension at all: the official website, pinned or installed as an app, does the job without the risk, on any computer you use. For Microsoft’s assistant, see how to use Copilot in Chrome.