You can submit an update for your add-on via the Developer Tools dashboard by choosing the option "Upload a new version" and uploading a new .xpi file for your add-on.
Móžośo pśez kontrolnu desku wuwijarskich rědow aktualizaciju zapódaś: Wubjeŕśo nastajenje „Nowu wersiju nagraś“ a nagrajśo nowu .xpi-dataju za swój dodank.