# Is this User-Agent safe and useful in Mullvad Browser?

**URL:** https://discuss.privacyguides.net/t/is-this-user-agent-safe-and-useful-in-mullvad-browser/40075
**Category:** Questions
**Tags:** please-eli5
**Created:** 2026-08-21T10:36:02Z
**Posts:** 4

## Post 1 by @privacyman — 2026-08-21T10:36:03Z

### Has anyone used the below User-Agent Switcher extension with **Mullvad Browser?** **(seems like only this extension does not collect use data)**

> **[User-Agent Switcher and Manager Material – Get this Extension for 🦊 Firefox...](https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher-and-md2/)**
>
> Download User-Agent Switcher and Manager Material for Firefox. Spoof websites trying to gather information about your web navigation to deliver distinct content you may not want With new and modern Ui

Does it actually improve privacy, or could changing the user agent make my browser fingerprint more unique and reduce anonymity? I’m also wondering whether it’s reliable, actively maintained, and unlikely to interfere with **Mullvad Browser’s** built-in privacy protections or break websites.

Would it be better to leave the default user agent unchanged?

Do you use any other user-agent with Mullvad Browser?

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## Post 2 by @ph00lt0 — 2026-08-21T10:37:01Z

Modifying a user agent will make your more unique which is counter intuitive. You should not install any add-ons in Mullvad Browser.

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## Post 3 by @any1 — 2026-08-21T16:57:42Z

> [@ph00lt0](#):
>
> You should not install any add-ons in Mullvad Browser.

While this is generally true, not everything has to be avoided. There was also talk about having a list of “safe” extensions to use.

> [@Mullvad browser and dark reader](https://discuss.privacyguides.net/t/mullvad-browser-and-dark-reader/20135/18):
>
> I’m not aware, but we have a plan to add this to Mullvad Browser at some point in the future, we’re just limited by our current resources.

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## Post 4 by @Ganther — 2026-08-21T17:39:33Z

> [@privacyman](#):
>
> Does it actually improve privacy

If it did, it would be included by default.

Since it doesn’t, it isn’t.