preparing to make Manifest v2 versions as alternatives because of how fucked the rollout of v3 is

Manifest v3 version/background.js

@@ -0,0 +1,56 @@
+// Cross-platform namespace support
+window.browser = (function () {
+  return window.browser ||
+    window.msBrowser ||
+    window.chrome;
+})();
+
+var shuffle = function (array) {
+	var currentIndex = array.length;
+	var temporaryValue, randomIndex;
+
+	// While there remain elements to shuffle...
+	while (0 !== currentIndex) {
+
+		// Pick a remaining element...
+		randomIndex = Math.floor(Math.random() * currentIndex);
+		currentIndex -= 1;
+
+		// And swap it with the current element.
+		temporaryValue = array[currentIndex];
+		array[currentIndex] = array[randomIndex];
+		array[randomIndex] = temporaryValue;
+	}
+
+	return array;
+};
+
+browser.action.onClicked.addListener(function() {
+  browser.tabs.query({}, function(tabs) {
+    let count = Math.floor(tabs.length / 2) + 1   // I don't remember why we need an extra +1 here, but it is necessary
+    var ok = confirm("Are you sure you want to close " + count + " tabs?")
+    if (ok) {
+      shuffle(tabs)
+      tabs = tabs.slice(1, count)
+      let tab_identifiers = [];
+      for (tab in tabs) {
+        tab_identifiers.push(tabs[tab].id)
+      }
+      browser.tabs.remove(ids)
+    }
+  })
+})
+
+function updateCount() {
+  browser.tabs.query({}, function(tabs) {
+    let count = Math.floor(tabs.length / 2)
+    browser.action.setBadgeText({ text: "" + count })
+  })
+}
+
+browser.tabs.onCreated.addListener(updateCount)
+browser.tabs.onRemoved.addListener(updateCount)
+browser.windows.onCreated.addListener(updateCount)
+browser.windows.onRemoved.addListener(updateCount)
+
+updateCount()