The unnamed "popular and widely-deployed application" appears to be Firefox and Thunderbird: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949644 https://bu

The unnamed "popular and widely-deployed application" appears to be Firefox and Thunderbird: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949644 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=949644 There's more discussion here: https://bugzilla.mozilla.org/show_bug.cgi?id=1607902 https://bugzilla.mozilla.org/show_bug.cgi?id=1607902