The last tab is partially hidden under the search bar

[wvxwxvw]

For myself, I decided both this and the excessive height of the panel, but it is desirable to correct it using the addon.
userContent.css

@-moz-document url-prefix(moz-extension://Here UUID TST) {
#tabbar-container {
    --after-tabs-area-size: 62px !important;
    --subpanel-content-size: 30px !important;
  }
#subpanel-container {
    height: 30px !important;
  }
}