- option to choose the format for the reply to mails in "alternative" format;
- option to have the date in an "international" format, with timezone;
- the CC field is parsed correcty according to rfc 2047 and 2231;
- added a dropdown menu to the "Reply to all" button (thanks to Tomasz Kepski);
- little adjustments in the header layout;
- fixed a bug about the customized headers support;
- are hidden the special chars " and \ in the addresses;
- modified the order of header's elements, with the subject at the first place, in analogy with forward header;
- added an option to reply stripping off the inline attachments;
- the char % in headers is replaced by the sequence %' to have a workaround for bug 334053;
- fixed a bug that, in some situations, caused a wrong beahviour of the "Reply" button;
- better code;
- fixed a bug about resetting of customized headers, despite of the extension's options;
- fixed other small bugs;

- the extension now works properly also if you reply to an email saved externally as eml file;

- better way to determinate the format (plain text or HTML) of the message to which you reply;
- possibility to have the date in reply headers with the original format.

- fixed a bug about IMAP accounts in certain cases;
- autoupdate enabled;

- fixed some minor bugs;
- cleaner code;

Changelog 0.5.3.1:
- fixed a bug that could block the reply function, when the Cc field had illegal characters;
Changelog 0.5.4:
- fixed a bug that blocked the reply function, with eml attachments;
Changelog 0.5.5:
- added an option to mark as read the message when you reply to it;
- added an option to close the message window when you reply;
Changelog 0.5.5.1:
- fixed a small bug;