Firefox Klar: No Fuss Browser

4.7
17.3K reviews
500K+
Downloads
Content rating
Everyone
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Screenshot image
Screenshot image

About this app

Browse like no one’s watching. The new Firefox Klar automatically blocks a wide range of online trackers — from the moment you launch it to the second you leave it. Easily erase your history, passwords and cookies, so you won’t get followed by things like unwanted ads.

“Private browsing” on most browsers isn’t comprehensive or easy to use. Klar is next-level privacy that’s free, always on and always on your side — because it’s backed by Mozilla, the non-profit that fights for your rights on the Web.

AUTOMATIC PRIVACY
• Blocks a wide range of common Web trackers without any settings to set
• Easily erases your history — no passwords, no cookies, no trackers

BROWSE FASTER
• By removing trackers and ads, Web pages may require less data and load faster

MADE BY MOZILLA
• We believe everyone should have control over their lives online. That’s what we’ve been fighting for since 1998.
Updated on
Dec 17, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
14.4K reviews
Marian M
August 19, 2025
I like the clean and simple design, which makes the browser very appealing. However, I am not using it due to two key limitations: 1. The search bar cannot be moved to the bottom of the screen, as offered in Opera. Having it at the bottom provides a much more comfortable typing experience. 2. There is no dark mode (dark reader) option to display the webpages (ideally a near-black background/near-white text). Dark mode would not only improve visual comfort but also help with battery efficiency.
Dodecamethyl Cyclohexasilane (cyclohexasilane)
February 3, 2025
It is so frustrating. I started to rejoice when I opened the app and saw that there is no icon to the left of the address bar but then... it sorted when I visited a page... and it is the thrash icon! This spot is notoriously close to where the "Back" button on many sites is, so it is prone to be hit accidentally. And it closes the site. Irreversibly. Didn't that come up in your UX tests? Or do you just not include people with low depth perception in those?
1 person found this review helpful
Makurafa
November 13, 2025
I don't recommend using this as your default or main browser, but those that used this browser or Firefox Focus in the past, sure have a reason for why. Just use it as a secondary browser for certain actions… Speaking of Focus, stay away from it, use this one! Btw, those hidden setting urls (like chrome://… etc.) work in Klar as well, just wanted to mention that…
9 people found this review helpful

What’s new

Fehlerbehebungen und technische Verbesserungen.