This add-on collects nothing, sends nothing, and makes no network request of any kind.
There is no server behind it, no analytics, no telemetry, no crash reporting, and no
remote code. Nothing it holds ever leaves your computer.

What it stores

Everything lives in the add-on's own local storage, on your machine, and consists of four
things:

- the rules you create: an email address or a domain, and the reply position you chose
for it;
- the default position, used when no rule matches;
- where the signature goes when the compose window gives no way to tell;
- a version number for the format of the above.

That is the whole of it. Removing the add-on removes that storage with it.

What it reads and does not keep

To decide where to place your reply, the add-on asks Thunderbird for the details of the
compose window. Of what comes back it uses three things: whether the window is a reply or
a forward, whether it is HTML or plain text, and the first address of the "To" field. The
other recipients, the "Cc" and "Bcc" fields and the subject are not looked at.

That first address is used at the moment the window opens, to look for a matching rule,
and is written nowhere. It becomes stored data only if you ask for it yourself, by ticking
"Remember this choice" for that contact or for their whole domain in the toolbar popup.

The add-on reads the body of the message you are composing, in order to move the quote
block above or below your writing area. It changes the order of the parts and never their
content. To keep the move undoable in a single Ctrl+Z, it holds a copy of that body in
memory for the length of the operation; nothing of it is kept afterwards, written to disk,
or transmitted anywhere.

Your address book is neither read nor modified. The add-on does not request the
addressBook permission, and a recipient picked from the address book is one it explicitly
declines to resolve.

Your mail folders and your account settings are not read: the add-on requests neither the
messagesRead nor the accountsRead permission. The only message content it ever touches is
the compose window you have open in front of you, quoted text included, since that quote
is part of the body it rearranges.

Export and import

The options page can write your rules to a JSON file, through your browser's own download,
and read such a file back. That file stays on your machine and is sent nowhere.

Permissions

Three, and no host permission: "compose" to read the recipient and the kind of compose
window, "scripting" to run the script that rearranges the body, "storage" to keep the
rules described above.

Contact

Questions and issues: https://github.com/nd-/thunderbird-reply-position