# PDF Reader That Is The Best For User Privacy?

**URL:** https://discuss.privacyguides.net/t/pdf-reader-that-is-the-best-for-user-privacy/15410
**Category:** Questions
**Created:** 2023-12-05T14:59:11Z
**Posts:** 81
**Showing post:** 28 of 81

## Post 28 by @Average_Joe — 2024-01-29T21:15:30Z

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> [@lepras](#):
>
> ![](https://forum-cdn.privacyguides.net/user_avatar/discuss.privacyguides.net/average_joe/48/6_2.png) Average\_Joe:
> 
> > Do you use anything else to prevent Sumatra from contacting the Internet and sending private and personal user data?
> 
> firewall it? (Portmaster)

I appreciate your reply!

I don’t have any experience with this App. Is it recommended on Privacy Guides?

How can I trust it?

Edit: I have a thread here dedicated to the topic of Windows software firewalls:

> [@Software Firewall for Windows?](https://discuss.privacyguides.net/t/software-firewall-for-windows/13859/53):
>
> That’s a general problem with unsandboxed apps. On Linux it’s not different. If you use a sudo account for everyday use, it’s even easier for malicious apps to manipulate firewall rules than on Windows.

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