Hi @Walter Svenddal ,
Edge extensions support most Chrome APIs and you'll find more information here. Unfortunately, Edge currently does not have Edge-specific extension APIs like edge.tabs or something. But you can still use supported APIs like chrome.tabs.group to build an extension to manage tab groups in Edge.
Code sample
aync function test() {
var groupId = await chrome.tabs.group({ tabIds: tabId });
chrome.tabGroups.update(groupId, { collapsed: false, title: "title", color: "blue" });
}
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Best Regards,
Shijie Li