https://pagure.io/JS-Shield/JS-Shield/issue/9
With jShelter / Firefox, roundcube webmail (see https://github.com/roundcube) reports "Mailbox is empty" and shows no messages. The rest of the web UI seems functional, but inbox and spam folder, for example, appear empty (though they really have contents). Setting the restrictor to 0 restores normal functionality.
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