The long em: id string is the application UUID of Firefox itself.

较长的em： id字符串是Firefox自身的应用程序全球惟一标识符(UUID)。

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The wildcard asterisk character must be the last character in the App ID string.

星号必须是App ID字符串的最后一个字符。

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Thus, in order to obtain the message ID, we take the internal ID string, in this case 123.

这样，为了获得消息ID，我们采用内部ID字符串，在本例中为123。

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Websites install a "cookie" file on a user's computer, which includes a unique string of letters and numbers that make up the session ID.

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