chrome.tabs.highlight giving error "No tab at index"
chrome.tabs.highlight requires a tab index, not a tabId. You can convert a tabId into an index using chrome.tabs.get:
chrome.tabs.get(tabId, function(tab) {
chrome.tabs.highlight({'tabs': tab.index}, function() {});
});
Another important thing (in addition of using the tab index) is to provide the windowId
. This is not documented in the official chrome docs, but helps if a different window or inspector is active.
chrome.tabs.highlight({
windowId: tab.windowId,
tabs: tab.index
}, function () {});