If you are using an in-browser Ethereum wallet (e.g. Metamask, Brave, Parity) then any website can detect if you are an Ethereum user. I wouldn't be surprised if some advertisers are already collecting this information.
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Replying to @backus
Purely bogus to list Brave there. Metamask is optional, not on by default. Brave’s BAT user wallet is not detectable.
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Replying to @BrendanEich @backus
MetaMask is in fact ON in Brave 0.19.122 by default, along with a PDF and Torrent viewer as well as Save to Pocket. Everything else is disabled by default, i.e. 3 different password managers and a Honey coupon finder.
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Replying to @Crypto1Chan @BrendanEich
Are you sure? I installed 0.19.122 to check and it seems like it is installed but disabled. If you are on OS X, use something like AppCleaner to uninstall: https://freemacsoft.net/appcleaner/ . Do fresh install after that.pic.twitter.com/sEztSoEV69
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Replying to @backus @BrendanEich
I'm sure. I don't remember the version, but installed Brave just days after its release and subsequent upgrades. Possible change turning MM off in later downloads of 0.19.122. Using MM in FF 1st time just hrs before your post. IMO- too risky, too many moving parts. Disabled it.
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Replying to @Crypto1Chan @backus
Ok, that is bad if true; glad we fixed it. Defaults should be disabled. Staff heard this loud and clear tonight.
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Replying to @BrendanEich @backus
Keep in mind, I installed Brave just days after its first release as well as subsequent updates, so it's possible the correct or incorrect default settings could have carried forward somewhere along the way. Brave is also on my phones and the 1st browser opened in the morning.
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Replying to @Crypto1Chan @BrendanEich
I haven’t checked this but if you’re right and you never manually enabled, then I would guess one of the early versions enabled it by default and that setting got grandfathered into your updates.
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Replying to @backus @Crypto1Chan
BrendanEich Retweeted BrendanEich
Git history contradicts.https://twitter.com/brendaneich/status/955352237374492678 …
BrendanEich added,
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Yeah I tried installing the very first release (0.19.53) where Metamask was introduced and it was disabled by default. Don't see any changes that standout when git spelunking.
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