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this post was submitted on 28 Aug 2024
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Advertisers track you with device fingerprinting and behaviour profiling now. Firefox doesn't do much to obscure the more advanced methods of tracking.
Don't all the advanced ways rely on JavaScript?
Lots do. But do you know anyone that turns JS off anymore? Platforms don't care if they miss the odd user for this - because almost no one will be missed.
"Anymore"? I've never met a single soul who knows this is even possible. I myself don't even know how to do it if I wanted to.
I do use NoScript, which does this on a site-by-site basis, but even that is considered extremely niche. I've never met another NoScripter in the wild.
Why not just use ublock medium mode?
https://github.com/gorhill/uBlock/wiki/Blocking-mode:-medium-mode
Am I in the wild? I use it.
I like the grid add-on for Firefox. It disables 3rd party pretty much anything by default. And you can control cookies separately from everything else, and I can't remember any time I've needed to enable those cookies to get a site working properly (whereas sometimes you need to enable scripting, media, or iframe for cdn or something).
uBlock origin + NoScript for me. I deal with the bigger umbrella of scripts with uBlock and then fine tune permissions to the ones that uBlock allowed with NoScript.
They might be fingerprinting me using these two extensions though.
I use LibreJS with few exceptions. If I need to use a site that requires non-free JavaScript, I'll use a private browsing window or (preferably) Tor Browser.
Not all but most, yes. But TBF, sites that still function with JS disabled tend to have the least intrusive telemetry, and might pre-date big data altogether.
Regardless, unless the extent of a page’s analytics is a “you are the #th visitor” counter, all countermeasures must remain active.
It's not much but they try a whole lot more than most.
It's really strange how they specifically mention HTML5 canvas when you can run any fingerprinter test on the internet and see that Firefox does nothing to obfuscate that. You can run a test in Incognito mode, start a new session on a VPN, run another test, and on Firefox your fingerprint will be identical.
Well yeah, they're just blocking known fingerprinting services. If you use a tool that they don't recognize, it'll still work, but their approach will still block the big companies that can do the most harm with that data.
The only alternative is probably to disable WebGL entirely, which isn't a reasonable thing to do by default.
I wish Firefox had a per-site or per-domain preference for WebGL (as well as for wasm, etc), the same way we have per-site cookies or notifs preferences. It'd help clear most issues regarding this.
Honestly would be hard to do. There a perfectly legitimate and everyday uses for pretty much everything used in fingerprinting. Taking them away or obscuring them in one way or another would break so much.
Librewolf has Resist Fingerprinting which comes pretty far.
Every Librewolf browser uses the same windows user agent, etc. But there are downsides, like time zones don't work, and sites don't use dark mode by default.
And even then, EFF's Cover Your Tracks site can still uniquely identify me, mainly through window size. That's one of the reasons why Tor Browser uses letterboxing to make the window size consistent.
Librewolf supports letterboxing as well, though the setting might be disabled by default
Oh neat! I just tried it, and it seems it's broken on Gnome when using 125% scaling though :/ Still cool to have the feature!
I also just figured out how to expose dark mode and my timezone though with RFP, which is useful.
I don't know what letterboxing is. But if window size is used to identify me, can't it be circumvented simply by using the window in restored size, and not maximised?
Your restored window size is even more unique than your maximised window size!
The correct solution is to just not make the window size available to JS or to remotes at all. There's no reason to ever need specifics on window size other than CSS media-queries, and those can be done via profiles.
But the restored size keeps changing - can't be profiled, right?
And how do I not make the size available "to JS or to remote"?
Changing the source code of the browser, unfortunately. I don't know what Tor Browser does or how, but basically you'd have to do about the same as they do.
EU outlaws it
The EU isn't the only place on the planet, even if its laws have an impact.