When adding a custom filter - allow user to create new tags/folders from the filter window instead of going back to some obscure settings subsection somewhere. Nice to have:* Right click on a message - create filter from / filter messages like these * Click on an email address - find all emails with/from this address * Since this is an email client, make it easy to share feedback by emailing some sort of address like tb-feedback@mozilla.org or something from the help -> feedback menu .
just my 2c