diff --git a/lib/$.coffee b/lib/$.coffee
index 1da20735b..6977594ed 100644
--- a/lib/$.coffee
+++ b/lib/$.coffee
@@ -183,25 +183,8 @@ $.extend $,
   globalEval: (code) ->
     script = $.el 'script',
       textContent: code
-    $.add d.head, script
+    $.add (d.head or doc), script
     $.rm script
-  # http://mths.be/unsafewindow
-  unsafeWindow:
-    if window.opera # Opera
-      window
-    else if unsafeWindow? # Firefox
-      unsafeWindow
-    else # Chrome
-      do ->
-        uw = null
-        captureUW = (e) -> uw = e.detail
-        window.addEventListener 'unsafe', captureUW, false
-        s = d.createElement 'script'
-        s.textContent = 'window.dispatchEvent(new CustomEvent("unsafe", {detail: window}))'
-        (d.head or doc).appendChild s
-        s.parentNode.removeChild s
-        window.removeEventListener 'unsafe', captureUW, false
-        uw
   bytesToString: (size) ->
     unit = 0 # Bytes
     while size >= 1024
diff --git a/src/features.coffee b/src/features.coffee
index 9675525cf..9eae44902 100644
--- a/src/features.coffee
+++ b/src/features.coffee
@@ -665,33 +665,40 @@ Fourchan =
 
     board = g.BOARD.ID
     if board is 'g'
+      $.globalEval """
+        window.addEventListener('prettyprint', function(e) {
+          var pre = e.detail;
+          pre.innerHTML = prettyPrintOne(pre.innerHTML);
+        }, false);
+      """
       Post::callbacks.push
         name: 'Parse /g/ code'
         cb:   @code
     if board is 'sci'
+      # https://github.com/MayhemYDG/4chan-x/issues/645#issuecomment-13704562
+      $.globalEval """
+        window.addEventListener('jsmath', function(e) {
+          if (jsMath.loaded) {
+            // process one post
+            jsMath.ProcessBeforeShowing(e.detail);
+          } else {
+            // load jsMath and process whole document
+            jsMath.Autoload.Script.Push('ProcessBeforeShowing', [null]);
+            jsMath.Autoload.LoadJsMath();
+          }
+        }, false);
+      """
       Post::callbacks.push
         name: 'Parse /sci/ math'
         cb:   @math
   code: ->
     return if @isClone
     for pre in $$ '.prettyprint', @nodes.comment
-      pre.innerHTML = $.unsafeWindow.prettyPrintOne pre.innerHTML
+      $.event 'prettyprint', pre, window
     return
   math: ->
     return if @isClone or !$ '.math', @nodes.comment
-    # https://github.com/MayhemYDG/4chan-x/issues/645#issuecomment-13704562
-    {jsMath} = $.unsafeWindow
-    if jsMath
-      if jsMath.loaded
-        # process one post
-        jsMath.ProcessBeforeShowing @nodes.post
-      else
-        # load jsMath and process whole document
-        # Yes this requires to be globalEval'd, don't ask me why.
-        $.globalEval """
-          jsMath.Autoload.Script.Push('ProcessBeforeShowing', [null]);
-          jsMath.Autoload.LoadJsMath();
-          """
+    $.event 'jsmath', @nodes.post, window
   parseThread: (threadID, offset, limit) ->
     # Fix /sci/
     # Fix /g/
@@ -3523,7 +3530,7 @@ ExpandThread =
 
     # Enable 4chan features.
     if Conf['Enable 4chan\'s Extension']
-      $.unsafeWindow.Parser.parseThread thread.ID, 1, nodes.length
+      $.globalEval "Parser.parseThread(#{thread.ID}, 1, #{nodes.length})"
     else
       Fourchan.parseThread thread.ID, 1, nodes.length
 
@@ -4022,7 +4029,7 @@ ThreadUpdater =
         threadID = ThreadUpdater.thread.ID
         {length} = ThreadUpdater.root.children
         if Conf['Enable 4chan\'s Extension']
-          $.unsafeWindow.Parser.parseThread threadID, -count
+          $.globalEval "Parser.parseThread(#{threadID}, #{-count})"
         else
           Fourchan.parseThread threadID, length - count, length
 
diff --git a/src/qr.coffee b/src/qr.coffee
index 843cc4be2..b52dffe9a 100644
--- a/src/qr.coffee
+++ b/src/qr.coffee
@@ -577,6 +577,12 @@ QR =
       return unless @isEnabled = !!$.id 'captchaFormPart'
       $.asap (-> $.id 'recaptcha_challenge_field_holder'), @ready.bind @
     ready: ->
+      setLifetime = (e) => @lifetime = e.detail
+      $.on  window, 'captcha:timeout', setLifetime
+      $.globalEval 'window.dispatchEvent(new CustomEvent("captcha:timeout", {detail: RecaptchaState.timeout}))'
+      $.off window, 'captcha:timeout', setLifetime
+      c.log @lifetime
+
       imgContainer = $.el 'div',
         className: 'captcha-img'
         title: 'Reload'
@@ -644,7 +650,7 @@ QR =
     load: ->
       return unless @nodes.challenge.firstChild
       # -1 minute to give upload some time.
-      @timeout  = Date.now() + $.unsafeWindow.RecaptchaState.timeout * $.SECOND - $.MINUTE
+      @timeout  = Date.now() + @lifetime * $.SECOND - $.MINUTE
       challenge = @nodes.challenge.firstChild.value
       @nodes.img.alt = challenge
       @nodes.img.src = "//www.google.com/recaptcha/api/image?c=#{challenge}"
@@ -662,7 +668,7 @@ QR =
       @nodes.input.alt = count # For XTRM RICE.
     reload: (focus) ->
       # the 't' argument prevents the input from being focused
-      $.unsafeWindow.Recaptcha.reload 't'
+      $.globalEval 'Recaptcha.reload("t")'
       # Focus if we meant to.
       @nodes.input.focus() if focus
     keydown: (e) ->
diff --git a/src/report.coffee b/src/report.coffee
index 42ae19bd4..eea172ddc 100644
--- a/src/report.coffee
+++ b/src/report.coffee
@@ -6,7 +6,7 @@ Report =
     form  = $ 'form'
     field = $.id 'recaptcha_response_field'
     $.on field, 'keydown', (e) ->
-      $.unsafeWindow.Recaptcha.reload 't' if e.keyCode is 8 and not field.value
+      $.globalEval 'Recaptcha.reload("t")' if e.keyCode is 8 and not field.value
     $.on form, 'submit', (e) ->
       e.preventDefault()
       response = field.value.trim()