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TancaComentari del Extra Folder Columns per Franks
Rated 5 out of 5 stars
Yes, Extra Folder Columns is built in now, but in order to enable it you must modify with config editor the key
mail.folderpane.showColumns and set to true
ARB suggests to go to Options -> Layout -> click Folder Pane Columns but the option does not exist.
Per crear les vostres pròpies col·leccions, heu de tenir un compte al Mozilla Add-ons.