Premium
About Firefox Klar: No Fuss Browser 139.0
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.
Premium
“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.
Download Firefox Klar: No Fuss Browser 139.0
This release comes in several variants (we currently have 2). Consult our handy FAQ to see which download is right for you.
Version:8.4.0
Uploaded:June 25, 2020 at 9:37PM UTC
File size:53.84 MB
Version:144.0
Uploaded:October 12, 2025 at 4:41PM UTC
File size:34.99 MB
Downloads:62
Version:143.0.4
Uploaded:October 9, 2025 at 8:02PM UTC
File size:35.72 MB
Downloads:58
Version:143.0.3
Uploaded:October 1, 2025 at 4:05PM UTC
File size:35.72 MB
Downloads:65
Version:143.0.2
Uploaded:September 23, 2025 at 5:26PM UTC
File size:35.72 MB
Downloads:48
Version:143.0
Uploaded:September 14, 2025 at 6:20AM UTC
File size:35.71 MB
Downloads:82
Version:142.0.1
Uploaded:August 31, 2025 at 6:06AM UTC
File size:35.64 MB
Downloads:239
Version:142.0
Uploaded:August 31, 2025 at 6:06AM UTC
File size:35.64 MB
Downloads:140
Version:141.0.3
Uploaded:August 10, 2025 at 7:24PM UTC
File size:35.22 MB
Downloads:180
Version:141.0.2
Uploaded:August 6, 2025 at 1:27PM UTC
File size:35.22 MB
Downloads:65
Version:141.0.1
Uploaded:July 31, 2025 at 6:56PM UTC
File size:35.22 MB
Downloads:129
