Firefox Picture in Picture

[Ichisich]

Firefox's picture in picture (pip) can generate an external window for videos on almost every website.
The generated window is categorized completely as title bar (WM_NCHITTEST=2)

Since title bar actions are implemented and can create such mismatches, an additional black list would be advisable.

[Ichisich]

I tested MMBLower=Bild-im-Bild|MozillaDialogClass and it worked.

The MMBLower Blacklist seems to be already what I asked for.
I would perhaps add Firefox's pip as a default entry in the next release.

[RamonUnch]

I guess it makes sense, however the title: Bild-im-Bild seems language based, so if we want to add *|MozillaDialogClass we need to check that it will not disturb normal Firefox windows.
The main window is *|MozillaWindowClass and I think that the *|MozillaDialogClass is only used in the Help->about dialog which is not very important.
So I will add *|MozillaDialogClass` and see if I see some problems.

[RamonUnch]

So now titlebar the blacklist will be:

MMBLower=*|CASCADIA_HOSTING_WINDOW_CLASS,*|SDL_app,*|MozillaDialogClass

[Ichisich]

Unfortunate, that there is no language agnostic solution.
I will use *|MozillaDialogClass for some days and report if something becomes iffy.

[RamonUnch]

From my experience it seems good.

[Ichisich]

Can confirm, the only other collateral damage besides Firefox's about box is Thunderbird's about box.
Both are obscure and not really essential in daily use.