MyEtherWallet redid their website and put the old version of MEW at vintage.myetherwallet.com.
In addition, the 'hijack code' was changed from the U2F challenge parameter to the appId parameter, as the latter is a more stable representation of the website origin (for anti-phishing purposes). This was made apparent as the latest Chrome version changed how the challenge parameter was computed.
MyEtherWallet redid their website and put the old version of MEW at vintage.myetherwallet.com.
In addition, the 'hijack code' was changed from the U2F
challengeparameter to theappIdparameter, as the latter is a more stable representation of the website origin (for anti-phishing purposes). This was made apparent as the latest Chrome version changed how thechallengeparameter was computed.