TabPods 1.2.0

Fixed

• A tab could not be dropped at the end of a pod followed by another pod:
  Firefox does not know about capsules, so it put the tab either before the
  last tab of the pod or right after the next capsule, into the next pod.
• While a tab was dragged, the capsules after it moved left by the width of
  the tab, so the room for the tab could open on the wrong side of a capsule.

New

• Between the last tab of a pod and the capsule of the next one, a tab
  dropped closer to that last tab joins its pod, and one dropped closer to the
  capsule stays out of pods. Past the middle of the capsule it joins the next
  pod, as before.
• While you drag, the underline of the tab shows the pod it will join (no
  underline: none), and the capsules move aside together with the tabs, so
  the room for the tab opens where it will land.

Tested with Firefox 158 on Windows 11.

Updating

Replace TabPods.uc.js in the chrome folder of your profile with the one
attached below and restart Firefox.