User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/59.0.3071.109 Chrome/59.0.3071.109 Safari/537.36 Steps to reproduce: Hello, I've got a feature request that can be useful as tray icon (https://bugzilla.mozilla.org/show_bug.cgi?id=208923): many Linux distros have Windows-style taskbar (1.png). So, It would be great to add counter of new e-mails to window's headbar that decreases dynamically after reading them (5->4->3... etc). I've drawn example of it (2.png).

Not sure this is even possible. Richard may know

The reporter is on Linux -> changing plat form to Linux. I don't know to add a counter badge on Windows but should be doable as I saw it on other applications. For Linux (and also for Windows when not only the icon is shown) I think we could add the counter as text after the folder in the title, like: "Inbox (3) - ..." Like we have for Chat already. Aceman, what do you think, would this be complicated?

It should be easy to add number of unread messages in the titlebar when we already have code that updates the title bar on folder switch. However, if it should also be updated when a message is read (thus count of unread decreases), that could be a complication.

(In reply to Richard Marti (:Paenglab) from comment #3) > For Linux (and also for Windows when not only the icon is shown) I think we > could add the counter as text after the folder in the title, like: "Inbox > (3) - ..." Like we have for Chat already. Aceman, what do you think, would > this be complicated? I don't think that setting the counter after it like "Inbox (3)" is good idea because of translations. Yeah, "Inbox" is short in English, but it can be much longer in other languages (like "Входящие" in Russian). So, there is a chance that in some languages this counter may not to fit in visible area on the taskbar button. It should be better, as I already set, t set the counter first.