diff --git a/data/icon16.png b/data/icon16.png
new file mode 100644
index 0000000..06ff843
Binary files /dev/null and b/data/icon16.png differ
diff --git a/data/icon32.png b/data/icon32.png
new file mode 100644
index 0000000..80285d7
Binary files /dev/null and b/data/icon32.png differ
diff --git a/data/icon64.png b/data/icon64.png
new file mode 100644
index 0000000..5caee9f
Binary files /dev/null and b/data/icon64.png differ
diff --git a/data/inserter.js b/data/inserter.js
new file mode 100644
index 0000000..3bded2a
--- /dev/null
+++ b/data/inserter.js
@@ -0,0 +1,5 @@
+self.port.on('insert', data => {
+  var elem = document.createElement('div')
+  elem.textContent = data
+  document.body.appendChild(elem)
+})
diff --git a/index.js b/index.js
index 6995d96..9c9c94d 100644
--- a/index.js
+++ b/index.js
@@ -1,9 +1,62 @@
-var self = require("sdk/self");
+var self = require('sdk/self');
+var clipboard = require('sdk/clipboard')
+var buttons = require('sdk/ui/button/action');
+var tabs = require('sdk/tabs');
+var { ToggleButton } = require('sdk/ui/button/toggle')
+var timers = require('sdk/timers')
 
-// a dummy function, to show how tests work.
-// to see how to test this function, look at test/test-index.js
-function dummy(text, callback) {
-  callback(text);
+var button = ToggleButton({
+  id: "clipboard-inserter-btn",
+  label: "Toggle Clipboard Cnserter",
+  icon: {
+    16: "./icon16.png",
+    32: "./icon32.png",
+    64: "./icon64.png"
+  },
+  onChange: function(state) {
+    this.state('window', null)
+    let { checked } = this.state('tab')
+    checked = !checked
+    this.state('tab', { checked })
+    if(checked) {
+      enableMonitor()
+    } else {
+      disableMonitor()
+    }
+  }
+})
+//<div>Icons made by <a href="http://www.flaticon.com/authors/google" title="Google">Google</a> from <a href="http://www.flaticon.com" title="Flaticon">www.flaticon.com</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0" target="_blank">CC 3.0 BY</a></div>
+
+function enableMonitor() {
+  console.log("Enabling clipboard monitor")
+  tabs.activeTab.clinClipboardMonitor = new ClipboardMonitor()
 }
 
-exports.dummy = dummy;
+function disableMonitor() {
+  console.log("Disabling clipboard monitor")
+  var monitor = tabs.activeTab.clinClipboardMonitor
+  if(monitor) {
+    timers.clearInterval(monitor.intervalID)
+    delete tabs.activeTab.clinClipboardMonitor
+  } else {
+    console.error("Trying to disable clipboard monitor on tab without active ClipboardMonitor!")
+  }
+}
+
+function ClipboardMonitor() {
+
+  var lastContent = ''
+
+  this.worker = tabs.activeTab.attach({ contentScriptFile: self.data.url('inserter.js') })
+
+  this.intervalID = timers.setInterval(() => {
+    if(clipboard.currentFlavors.indexOf('text') != -1) {
+      var currentContent = clipboard.get('text/unicode')
+      if(lastContent !== currentContent) {
+        this.worker.port.emit('insert', currentContent)
+        lastContent = currentContent
+      }
+    }
+  }, 100)
+
+}
diff --git a/test/test-index.js b/test/test-index.js
index b3ad6e8..34c319b 100644
--- a/test/test-index.js
+++ b/test/test-index.js
@@ -1,19 +1 @@
 var main = require("../");
-
-exports["test main"] = function(assert) {
-  assert.pass("Unit test running!");
-};
-
-exports["test main async"] = function(assert, done) {
-  assert.pass("async Unit test running!");
-  done();
-};
-
-exports["test dummy"] = function(assert, done) {
-  main.dummy("foo", function(text) {
-    assert.ok((text === "foo"), "Is the text actually 'foo'");
-    done();
-  });
-};
-
-require("sdk/test").run(exports);