this post was submitted on 04 Aug 2025
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LibreWolf

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LibreWolf is designed to increase protection against tracking and fingerprinting techniques, while also including a few security improvements. LibreWolf also aims to remove all the telemetry, data collection and annoyances, as well as disabling anti-freedom features like DRM. If you have any question please visit our FAQ first: https://librewolf.net/docs/faq/

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Trying to load my usual Proton Mail web app and I get an error that is completely un-bypassable. Details of the error say "This version of Firefox is no longer supported due to a bug in the WebCrypto API. Please Update to a newer version".

Has anyone encountered this and found a fix? Not sure the devs are aware either. Any info is appreciated.

EDIT: Issue was somehow my LibreWolf was not updating as a result of various package manager repo things. Manually updating the install to the latest version fixed this problem.

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[–] swelter_spark@reddthat.com 2 points 1 month ago

Electron Mail is a stand-alone app you can use to check your Proton Mail.

[–] monovergent@lemmy.ml 1 points 1 month ago* (last edited 1 month ago) (1 children)

No issues yet, but I did allow history and cookie retention, if that's at all relevant. Will keep an eye out though.

[–] Kagu@lemmy.ml 1 points 1 month ago

So the proton mail webapp works just fine for you? I don't know how I could have broken mine... Maybe I'll try a fresh install or something. Supposedly my librewolf is the latest version

[–] sunzu2@thebrainbin.org 1 points 1 month ago (1 children)
[–] Kagu@lemmy.ml 1 points 1 month ago (1 children)

Not sure what that is. My librewolf install is entirely stock except for one homepage plugin called nightTab

[–] sunzu2@thebrainbin.org 1 points 1 month ago (1 children)

It ia an addon that will break web apps like proton, tuta etc

[–] Kagu@lemmy.ml 1 points 1 month ago (1 children)

Does it come default? I had been using librewolf for over 6 months without problems, and haven't installed any plugins myself

[–] sunzu2@thebrainbin.org 1 points 1 month ago (1 children)

No, deff not default.

Check persistent storage setting under permissions, that could be another thing that would brick these apps

[–] Kagu@lemmy.ml 1 points 1 month ago (1 children)

Thing is, proton is already in my exceptions for a bunch of the LibreWolf features...

I have it bypassing resist fingerprinting, I let it save cookies. When I search for peristent storage it just takes me to 'Cookies and Site Data' which already has proton mail and other urls excepted...

[–] orphigle@lemmy.ml 2 points 1 month ago (1 children)

Resist fingerprinting should never be bypassed. Instead, file a complaint with Protonmail that they are serving spyware from their website. This is the main reason why I chose mailbox.org over protonmail.

[–] Kagu@lemmy.ml 3 points 1 month ago* (last edited 1 month ago) (1 children)

I understand and agree with you in principle but "Tell the mail service to change their application" is such a long-shot step to fix the issue that I simply want to be able to use my browser to access my webmail...

From where I'm standing it's easier to switch to hardened Firefox than to switch mail providers just to continue to use Librewolf

~~EDIT: I would love an explanation of wtf the WebCrypto API even is and why you think it's spyware, though~~ EDIT 2: Proton claims the WebCrypto API is a browser security feature. It's also developed by Mozilla

EDIT 3: Fixed this by simply forcing an update to the latest version of LibreWolf. Not a browser problem, not a proton mail problem, WebCrypto API is not spyware.

[–] sunzu2@thebrainbin.org 2 points 1 month ago (1 children)

Respect on coming back to share the solution 🫡

[–] Kagu@lemmy.ml 2 points 1 month ago

The amount of ppl that don't do that is really saddening lol

[–] eldavi@lemmy.ml 1 points 1 month ago

i was going to start moving to librewolf very soon and this makes me second guess myself; i hope this gets resolved.