So that it looks like the Windows version: title bar and tabs are together. The close and minimise buttons are to the side of the tabs.

I believe this isn’t enabled for KDE Plasma.

If you like a separate title bar like the old version of Firefox, then use the hamburger menu, choose “customise” and check the box for the title bar.

Unfortunately, it doesn't pick up the actions associated, for example, to the "double-click" or "middle-click" or at least not on my desktop.

Someone knows if it's customizable in the config menu, searching the obvious "titlebar" reports only two not useful entries?

It is, it's a checkbox at the bottom left of the "Customize" panel.

I should have explained it better, I was asking about associating actions to the "compact" titlebar (or what's called). I guess I need to wait for a proper GTK3 "header bar", if it's planned at all...

Anyway thanks.

Edit: in Chrome/Chromium works as I expected, I think I should file a bug then.

Odd, Firefox 65 already appears to do this under Gnome, unless I'm misunderstanding.

Could be that Ubuntu were already doing this and it has now made it upstream, I suppose.

I believe it's non-default behavior. There's a keyboard shortcut to hide it.

I think it was behind a flag before.

It's visible in the tab: https://i.imgur.com/UOvz505.png

That seems problematic; even in your screenshot with just one tab, the title gets cut off after just a couple words.

It looks like Windows. If it behaves like it, then you can read the full title by hovering over the tab.

I haven't used gnome in quite a while, so I'm not totally certain of what was before this change, but I wouldn't consider it problematic. I find that saving the extra 20 pixels at the top is good for the widescreen aspect ratio of most monitors.

IMO, the title isn't really helpful anyway. I did a userChrome.css thing a while back to make it just show favicons in the tab bar with one or two pixels of space and it works great. The tabs don't jump around when you switch tabs and you can fit a bunch more of them in the same space (I keep favicon bookmarks on the right side of the tab bar).

This is useless for sites that don't have favicons.

For what it's worth, you can see the entire title by hovering over the truncated text in the tab.

I assume they mean the application window title bar which simply says Firefox on Gnome.