Skip to main content


Umbra is a Firefox ESR fork with no telemetry


We built Umbra by forking, updating, and improving the ghostery browser build script, fern.js

Umbra removes all telemetry and outgoing requests except for codec requests ( netfix works!) All non-browsing features like AI, pocket, and profiles are also removed,

The idea behind umbra is usable privacy. By default RFP is off because it breaks websites.

You can build Umbra yourself but using the build script at github.com/openconstruct/user-…

Or downod binaries for Linux/WIn at github.com/openconstruct/umbra…

in reply to jerry

Cool project. Will it support existing extension?
in reply to faizalr

Yeah it supports all firefox extensions. We kept the parts that don't spy on you.
in reply to faizalr

I don't like browsers phoning home, even when it's convenient. You can import history/password from another browser.
in reply to jerry

Its encrypted tho as far as i know (Unless just privacy is your concern). But Yea to each their own
This entry was edited (3 weeks ago)
in reply to faizalr

If you want hardened Firefox with sync you could use Librewolf.
This entry was edited (4 weeks ago)
in reply to jerry

I came here to ask the million dollar question, they answered it on their GitHub.

How we are differnt from Librewolf? Umbra uses the built in firefox password manager instead of recommending extensions. Netflix works, and we do not enable RFP ( resist fingerprinting ) by default as it breaks many web pages. We also have an Umbra Control Center ( about:umbra or bottom left in setting menu) that allows you to set many privacy settings and set profiles for individual web sites. ( may be more differences just the top of my head)
in reply to NKBTN

I'm not super familiar with ironfox. Currently we're only available on Linux/windows. We don't use profiles at all.
in reply to jerry

Congratulations!

Tradeoff question—

Should I expect to find some semblance of safety in sticking with the largest open source browser project I can find, given perhaps the eyeballs etc., or would you reckon not (or even perhaps the opposite, security through obscurity & Umbra is “safer” than Firefox)?

Maybe this is so “lightly” forked it’s “just” stripping + cosmetics & the risk profile is essentially identical?

This entry was edited (3 weeks ago)
in reply to brbposting

Umbra doesn't add any security flaws to firefox. Every security fix applied to firefox esr is also applied to Umbra.
in reply to jerry

That makes you different eh? Love that. Means I could actually use it :D
in reply to jerry

Very cool indeed. Librewolf user and love it, but always need good options because you never know the future.

Definitely be checking this one out. Cheers!

in reply to jerry

I assume your disability is related to grammar, since there are a lot of errors in your Readme, or you might just not be that good with English yet. Whatever the case might be, it would look more trustworthy and professional if you would fix those.

Kagi Translate or LanguageTool can help:
translate.kagi.com/
languagetool.org/

in reply to jerry

Interesting, I'll check it out. I see the flapak release, will you make it available from flathub?
This entry was edited (3 weeks ago)