This extension adds several new items to edit and context menus, as well as shortcuts in all (or most) of Firefox & Thunderbird windows. The added functionality is as follows:
To Cyrillic, Ctrl+Shift+Q
Convert text selected in an editable area such as search field or URL bar from latinica to cyrillic.
To Translit, Alt+Ctrl+Shift+Q
Convert text selected in an editable area from cyrillic to translit
Cyrillic Mode, F2
(new feature in version 0.3)
This turns on the virtual latinica keyboard for the selected edit area. While in this mode, latinica typed into the window will be automatically translated into corresponding cyrillic text, much in the same way as the popular translit converter on translit.ru