I have started using OneTab plugin to do this, where I would collapse
all tabs into a OneTab page, then rearrange them, but this would also
"Two workarounds for this:
To move tabs left or right in a single window you can use
Ctrl+Shift+PgUp and Ctrl+Shift+PgDown.
To move tabs between two Chromium windows you need to set the
destination window to be "Always on top". Then dragging a tab from the
source window to the destination would actually allow the tab to be
inserted in the destination window, as expected."