From August 31st, 2017 to April 28th, 2021, 67% user give 4-star rating, 33% user give 1-star rating. for Gmail message ID finder chrome extension.
Doesn't work anymore. Does not show up as a menu option.
Does what it says. Note that "Message ID" in the context of this extension means the value of the "Message-ID" header, defined by RFC 822 and RFC 2822, and described by the Wikipedia article "Message-ID." It does *not* refer to Gmail's internal message ID, as used by the Gmail API or as is visible within the browser URL when viewing a message/thread.
(-1). No support for Google Inbox (+5) Works flawlessly in mail.gmail.com :D