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tabGroups.TabGroup - Mozilla | MDN
The state of a tab group.
Values of this type are strings. Possible values are:
collapsed
boolean. Whether the tab group is collapsed or expanded in the tab strip.
color
tabGroups.Color
id
integer. The unique ID of the tab group. Can't be tabGroups.TAB_GROUP_ID_NONE
title
string. The user-defined name of the tab group.
windowId
integer. The unique ID of the window the tab group is in.
