Comment # 4
on bug 1216842
from pallas wept
This also happens with Firefox nightly built by Mozilla - I just tried out
https://download-installer.cdn.mozilla.net/pub/firefox/nightly/latest-mozilla-central-l10n/firefox-121.0a1.en-GB.linux-x86_64.tar.bz2
and it was exactly the same, can't drag-n-drop tabs in the all tabs list to
re-order them, until you create enough tabs that the list fills the entire
page, then it works...but this was not the openSUSE packaged Firefox, this is
just the pre-built nightly, with a clean profile.... so perhaps this is caused
by some interaction between FF and the KDE Wayland session?
I also found more interesting behaviour to replicate this. It doesn't need to
have the all tabs list the full length of the screen. It only has to go just
past the bottom of the window. For example, if I un-maximize the window, and
resize it to half the screen, and move it to the top half of the screen, then I
needed 19 tabs - enough to make 3 tabs overlap the bottom of the window, and
then it would work.
If I resize to 1/4 of my screen, I needed only 8 tabs to make it work.
At the smallest height it would allow me to resize, I could make the list work
with just 4 tabs (plus the extra menu items above the tab list)
On top of this, if I maximise the window when it is tiny short like this and
the list is working, when I maximise it, the list stops working again, I can't
drag-n-drop... and when I un-maximise, it immediately works again.
When it is crazy short and working, if I resize the window to be taller than
the all tabs list, if the all tabs list is open when I resize, it will continue
to work, until I close the list and re-open it, and it stops working again and
I can't drag-n-drop any more.
If I then resize the window to be shorter than the all tabs list, short enough
that it would have worked before, it won't work, until I create a new tab, and
that kicks it off and it works.
The browser tools console returns an error when the failure occurs:
browser.ui.interaction.alltabs_menu - Unknown scalar.