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We should use both
dns-prefetchandpreconnect(separately) to speed up connexions to additional servers in most browsers: - Firefox doesn't supportpreconnectanymore on HTTPS - Safari doesn't support having both in the same instruction nho.io/n/2020/12/22/1/ -
Thanks @Accudio, @theystolemynick, @boostmarks, @tunetheweb, @yoavweiss and @AndyDavies for the TIL!