Bugzilla

If you decide that you actually want this, I would implement the following part of the RFC 6367 spec, intended for accurate DKIM validation:
```3.4.3.  The "simple" Body Canonicalization Algorithm

   The "simple" body canonicalization algorithm ignores all empty lines
   at the end of the message body.  An empty line is a line of zero
   length after removal of the line terminator.  If there is no body or
   no trailing CRLF on the message body, a CRLF is added.  It makes no
   other changes to the message body.  In more formal terms, the
   "simple" body canonicalization algorithm converts "*CRLF" at the end
   of the body to a single "CRLF".

   Note that a completely empty or missing body is canonicalized as a
   single "CRLF"; that is, the canonicalized length will be 2 octets.

   The SHA-1 value (in base64) for an empty body (canonicalized to a
   "CRLF") is:

   uoq1oCgLlTqpdDX/iUbLy7J1Wic=

   The SHA-256 value is:

   frcCV1k9oG9oKj3dpUqdJg1PxRT2RSN/XKdLCPjaYaY=
```

I can build this, but I can't take away the decision whether you actually want this. I would also suggest adding a way to opt-out of this via about:config.

If you decide that you actually want this, I would implement the following part of the RFC 6367 spec, intended for accurate DKIM validation:
```
3.4.3.  The "simple" Body Canonicalization Algorithm

   The "simple" body canonicalization algorithm ignores all empty lines
   at the end of the message body.  An empty line is a line of zero
   length after removal of the line terminator.  If there is no body or
   no trailing CRLF on the message body, a CRLF is added.  It makes no
   other changes to the message body.  In more formal terms, the
   "simple" body canonicalization algorithm converts "*CRLF" at the end
   of the body to a single "CRLF".

   Note that a completely empty or missing body is canonicalized as a
   single "CRLF"; that is, the canonicalized length will be 2 octets.

   The SHA-1 value (in base64) for an empty body (canonicalized to a
   "CRLF") is:

   uoq1oCgLlTqpdDX/iUbLy7J1Wic=

   The SHA-256 value is:

   frcCV1k9oG9oKj3dpUqdJg1PxRT2RSN/XKdLCPjaYaY=
```

I can build this, but I can't take away the decision whether you actually want this. I would also suggest adding a way to opt-out of this via about:config.

If you decide that you actually want this, I would implement the following part of the RFC 6376 spec, intended for accurate DKIM validation:
```
3.4.3.  The "simple" Body Canonicalization Algorithm

   The "simple" body canonicalization algorithm ignores all empty lines
   at the end of the message body.  An empty line is a line of zero
   length after removal of the line terminator.  If there is no body or
   no trailing CRLF on the message body, a CRLF is added.  It makes no
   other changes to the message body.  In more formal terms, the
   "simple" body canonicalization algorithm converts "*CRLF" at the end
   of the body to a single "CRLF".

   Note that a completely empty or missing body is canonicalized as a
   single "CRLF"; that is, the canonicalized length will be 2 octets.

   The SHA-1 value (in base64) for an empty body (canonicalized to a
   "CRLF") is:

   uoq1oCgLlTqpdDX/iUbLy7J1Wic=

   The SHA-256 value is:

   frcCV1k9oG9oKj3dpUqdJg1PxRT2RSN/XKdLCPjaYaY=
```

I can build this, but I can't take away the decision whether you actually want this. I would also suggest adding a way to opt-out of this via about:config.