diff --git a/r2/example.ini b/r2/example.ini
index 10e631e49..e7c0db3e0 100644
--- a/r2/example.ini
+++ b/r2/example.ini
@@ -172,6 +172,8 @@ adtracker_url = /static/pixel.png
 adframetracker_url = /static/pixel.png
 # open redirector to bounce clicks off of on sponsored links for tracking
 clicktracker_url = /static/pixel.png
+# url to request to track interaction statistics
+uitracker_url = /static/pixel.png
 # new pixel
 newtracker_url = 
 
diff --git a/r2/r2/lib/template_helpers.py b/r2/r2/lib/template_helpers.py
index bd613ba1e..f393c37c1 100755
--- a/r2/r2/lib/template_helpers.py
+++ b/r2/r2/lib/template_helpers.py
@@ -145,6 +145,7 @@ def js_config():
         "tracking_domain": g.tracking_domain,
         "adtracker_url": g.adtracker_url,
         "clicktracker_url": g.clicktracker_url,
+        "uitracker_url": g.uitracker_url,
         "static_root": static(''),
     }
     return config
diff --git a/r2/r2/public/static/js/analytics.js b/r2/r2/public/static/js/analytics.js
index 8e2c0e304..680f2c887 100644
--- a/r2/r2/public/static/js/analytics.js
+++ b/r2/r2/public/static/js/analytics.js
@@ -95,5 +95,97 @@ r.analytics = {
         thumb.attr('href', click_url)
 
         thing.data('trackerFired', true)
+    },
+
+    fireUITrackingPixel: function(action, srname) {
+        var pixel = new Image()
+        pixel.src = r.config.uitracker_url + '?' + $.param(
+            _.extend(
+                {
+                    'act': action,
+                    'sr': srname,
+                    'r': Math.round(Math.random() * 2147483647) // cachebuster
+                },
+                r.analytics.breadcrumbs.toParams()
+            )
+        )
+    }
+}
+
+r.analytics.breadcrumbs = {
+    hasSessionStorage: 'sessionStorage' in window,
+    selector: '.thing, .side, .sr-list, .srdrop, .tagline, .md, .organic-listing, .gadget, a, button, input',
+
+    init: function() {
+        this.data = this._load()
+
+        var refreshed = this.data[0] && this.data[0]['url'] == window.location
+        if (!refreshed) {
+            this._storeBreadcrumb()
+        }
+
+        $(document).delegate('a, button', 'click', $.proxy(function(ev) {
+            this.storeLastClick($(ev.target))
+        }, this))
+    },
+
+    _load: function() {
+        if (!this.hasSessionStorage) {
+            return [{stored: false}]
+        }
+
+        var data
+        try {
+            data = JSON.parse(sessionStorage['breadcrumbs'])
+        } catch (e) {
+            data = []
+        }
+
+        if (!_.isArray(data)) {
+            data = []
+        }
+
+        return data
+    },
+
+    store: function(data) {
+        if (this.hasSessionStorage) {
+            sessionStorage['breadcrumbs'] = JSON.stringify(this.data)
+        }
+    },
+
+    _storeBreadcrumb: function() {
+        var cur = {
+            'url': location.toString()
+        }
+
+        if ('referrer' in document) {
+            var referrerExternal = !document.referrer.match('^' + r.config.currentOrigin),
+                referrerUnexpected = this.data[0] && document.referrer != this.data[0]['url']
+
+            if (referrerExternal || referrerUnexpected) {
+                cur['ref'] = document.referrer
+            }
+        }
+
+        this.data.unshift(cur)
+        this.data = this.data.slice(0, 2)
+        this.store()
+    },
+
+    storeLastClick: function(el) {
+        this.data[0]['click'] =
+            r.utils.querySelectorFromEl(el, this.selector)
+        this.store()
+    },
+
+    toParams: function() {
+        params = []
+        for (var i = 0; i < this.data.length; i++) {
+            _.each(this.data[i], function(v, k) {
+                params['c'+i+'_'+k] = v
+            })
+        }
+        return params
     }
 }
diff --git a/r2/r2/public/static/js/base.js b/r2/r2/public/static/js/base.js
index 3479f5c81..32744baee 100644
--- a/r2/r2/public/static/js/base.js
+++ b/r2/r2/public/static/js/base.js
@@ -4,6 +4,9 @@ r.setup = function(config) {
     r.config = config
     // Set the legacy config global
     reddit = config
+
+    r.config.currentOrigin = location.protocol+'//'+location.host
+    r.analytics.breadcrumbs.init()
 }
 
 $(function() {
diff --git a/r2/r2/public/static/js/login.js b/r2/r2/public/static/js/login.js
index 53b0552c3..f82829d7b 100644
--- a/r2/r2/public/static/js/login.js
+++ b/r2/r2/public/static/js/login.js
@@ -12,7 +12,7 @@ r.login = {
             endpoint = r.config.https_endpoint || ('http://'+r.config.ajax_domain),
             apiTarget = endpoint+'/api/'+action+'/'+username
 
-        if (this.currentOrigin == endpoint || $.support.cors) {
+        if (r.config.currentOrigin == endpoint || $.support.cors) {
             var params = form.serialize()
             params.push({name:'api_type', value:'json'})
             $.ajax({
@@ -192,7 +192,7 @@ r.ui.LoginForm.prototype = $.extend(new r.ui.Form(), {
 
     _handleNetError: function(result, err, xhr) {
         r.ui.Form.prototype._handleNetError.apply(this, arguments)
-        if (xhr.status == 0 && r.login.currentOrigin != r.config.https_endpoint) {
+        if (xhr.status == 0 && r.config.currentOrigin != r.config.https_endpoint) {
             $('<p>').append(
                 $('<a>')
                     .text(r.strings.login_fallback_msg)
diff --git a/r2/r2/public/static/js/reddit.js b/r2/r2/public/static/js/reddit.js
index d01343957..712b22acf 100644
--- a/r2/r2/public/static/js/reddit.js
+++ b/r2/r2/public/static/js/reddit.js
@@ -230,6 +230,8 @@ function toggle_label (elem, callback, cancelback) {
 }
 
 function toggle(elem, callback, cancelback) {
+    r.analytics.breadcrumbs.storeLastClick(elem)
+
     var self = $(elem).parent().andSelf().filter(".option");
     var sibling = self.removeClass("active")
         .siblings().addClass("active").get(0); 
@@ -332,6 +334,7 @@ function subscribe(reddit_name) {
             }
             $.things(reddit_name).find(".entry").addClass("likes");
             $.request("subscribe", {sr: reddit_name, action: "sub"});
+            r.analytics.fireUITrackingPixel("sub", reddit_name)
         }
     };
 };
@@ -344,6 +347,7 @@ function unsubscribe(reddit_name) {
             }
             $.things(reddit_name).find(".entry").removeClass("likes");
             $.request("subscribe", {sr: reddit_name, action: "unsub"});
+            r.analytics.fireUITrackingPixel("unsub", reddit_name)
         }
     };
 };
diff --git a/r2/r2/public/static/js/utils.js b/r2/r2/public/static/js/utils.js
index 5c850cce4..9f9fae4ce 100644
--- a/r2/r2/public/static/js/utils.js
+++ b/r2/r2/public/static/js/utils.js
@@ -1,5 +1,32 @@
 r.utils = {
     staticURL: function (item) {
         return r.config.static_root + '/' + item
+    },
+
+    querySelectorFromEl: function(targetEl, selector) {
+        return $(targetEl).parents().andSelf()
+            .filter(selector || '*')
+            .map(function(idx, el) {
+                var parts = [],
+                    $el = $(el),
+                    elFullname = $el.data('fullname'),
+                    elId = $el.attr('id'),
+                    elClass = $el.attr('class')
+
+                parts.push(el.nodeName.toLowerCase())
+
+                if (elFullname) {
+                    parts.push('[data-fullname="' + elFullname + '"]')
+                } else {
+                    if (elId) {
+                        parts.push('#' + elId)
+                    } else if (elClass) {
+                        parts.push('.' + _.compact(elClass.split(/\s+/)).join('.'))
+                    }
+                }
+
+                return parts.join('')
+            })
+            .toArray().join(' ')
     }
 }