Description

When clicking in a different panel pinned tab, the hidden tabs aren't showed. It changes the panel in the sidebery sidebar but it don't act like I changed the tab in the sidebar although it changed.

Expected behavior

Initially in the A Panel so it's showing the A Panel's tabs.

1. Click in the B Panel pinned tab.
2. Changes the showed tabs to the B Panel's tab in the sidebar but also in the native Firefox.

Actual behavior

Initially in the A Panel so it's showing the A Panel's tabs.

1. Click in the B Panel pinned tab.
2. Changes the showed tabs to the B Panel's tab in the sidebar but doesn't change in the native Firefox.