MouseVader Firefox extension

manifest.json

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+{
+
+  "manifest_version": 2,
+  "name": "MouseVader",
+  "version": "1.2",
+
+  "description": "A privacy tool that mislead trackers by creating noise in the collected user behavioral data via fake random mouse movement events in the background so it doesn't impact user experience",
+
+  "icons": {
+	  "860": "darth.png"
+  },
+
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["mousevader.js"]
+    }
+  ]
+
+}
+

mousevader.js

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+//DarthVader is a privacy tool intended to confuse trackers by creating noise in the collected data
+//Written by Fady Anwar
+
+var overevent = new MouseEvent("mouseover", {
+                                                        "view": window,
+                                                        "bubbles": true,
+                                                        "cancelable": true
+                                        });
+
+var outevent = new MouseEvent("mouseout", {
+                                                        "view": window,
+                                                        "bubbles": true,
+                                                        "cancelable": true
+                                        });
+
+function fakeHovers(){
+	let elements = document.getElementsByTagName("div");
+	let counter = 0;
+	//iteraring elements bottm up to hit more recent ones first, i.e. for virtual doms of bottomless timelines
+	for(var i = elements.length-1; i >  0; i--){
+		if(Math.random() > 0.95){
+			elements[i].dispatchEvent(overevent);
+			elements[i].dispatchEvent(outevent);
+			counter += 2;
+
+			//capping hovers
+			if(counter >= 500)
+				break;
+		}
+	}
+	console.log(counter + " fake mouse events dispatched!");
+	//backoff mechanism: more elements = longer timeout
+	let timeout = 5000 + elements.length;
+	console.log("Next round in " +  timeout + " milliseconds");
+	setTimeout(fakeHovers, timeout);
+}
+
+
+console.log("Faking mouse movements started!");
+fakeHovers();