diff --git a/src/browser.lua b/src/browser.lua
deleted file mode 100644
index 820a85d..0000000
--- a/src/browser.lua
+++ /dev/null
@@ -1,24 +0,0 @@
-local browser = {}
-
-browser.to = function(url,refererer)
-  print("surfing to " .. url)
-  local URL = api.url.parse(url) 
-  foreach( api.protocol, function(name, p)
-    if URL.protocol:match("^"..name) then 
-      protocol = p
-    end
-  end)
-  if protocol then
-    local status, data, headers = protocol.request(url)
-    local ctx = {
-      succes  = (status >= 200 and status < 300),
-      status  = status,
-      data    = data,
-      headers = headers, 
-      URL     = URL
-    }
-    api.exec( api.ext, 'renderURI', ctx )
-  end
-end
-
-return browser
diff --git a/src/ext/3DFile/main.lua b/src/ext/3DFile/main.lua
new file mode 100644
index 0000000..cdb362f
--- /dev/null
+++ b/src/ext/3DFile/main.lua
@@ -0,0 +1,32 @@
+local api = ...
+local ecs = api.ecs
+
+return {
+  name = "3DFile",
+  enabled = true,
+
+  init = function() 
+    modelLoader = ecs.processingSystem()
+    modelLoader.updatesystem = true 
+    modelLoader.filter = ecs.requireAll('URL', 'method', 'data', 'ok')
+    function modelLoader:process(req, dt)
+      if req.ok and req.model == nil then
+        if req.URL.extension == 'OBJ'  or 
+           req.URL.extension == 'GLB'  or 
+           req.URL.extension == 'GLTF' then
+
+          req.model = api.graphics.newModel( api.data.newBlob(req.data) )
+          api.world.add({ 
+            x = 0,
+            y = 0,
+            z = 0,
+            model = req.model,
+            req = req
+          })
+        end
+      end
+    end
+    api.world.add(modelLoader)
+  end
+
+}
diff --git a/src/ext/browser/main.lua b/src/ext/browser/main.lua
new file mode 100644
index 0000000..9c99a8f
--- /dev/null
+++ b/src/ext/browser/main.lua
@@ -0,0 +1,38 @@
+local api = ...
+local ecs = api.ecs
+
+return {
+  name = "browser",
+  enabled = true,
+
+  init = function() 
+    urlListener = ecs.processingSystem({
+      updatesystem = true,
+      filter = ecs.requireAll('url', 'method'),
+      onAdd = function(self,obj)
+        api.ext.browser.to(obj.url, nil, obj)
+      end
+    })
+    api.world.add(urlListener)
+  end,
+
+  to = function(url,refererer, opts)
+    opts = opts or {method = 'GET' }
+    print("surfing to " .. url)
+    local URL = api.url.parse(url) 
+    foreach( api.protocol, function(name, p)
+      if URL.protocol:match("^"..name) then 
+        protocol = p
+      end
+    end)
+    if protocol then
+      local status, data, headers = protocol.request(url)
+      opts.ok      = (status >= 200 and status < 300)
+      opts.status  = status
+      opts.data    = data
+      opts.headers = headers 
+      opts.URL     = URL
+    end
+  end
+
+}
diff --git a/src/ext/gltf/main.lua b/src/ext/gltf/main.lua
deleted file mode 100644
index 6d2d110..0000000
--- a/src/ext/gltf/main.lua
+++ /dev/null
@@ -1,27 +0,0 @@
-local api = ...
-
-local gltf = {
-  name = "gltf",
-  enabled = true,
-
-  init = function() end,
-
-  renderURI = function(ctx)
-    local URL = ctx.URL
-    local me  = api.ext.gltf
-    if ctx.succes and URL.extension == 'GLB' or URL.extension == 'GLTF' then
-      local model = api.graphics.newModel( api.data.newBlob(ctx.data) )
-      local ecs   = api.ecs
-      ecs.add( ecs.world, { 
-        x = 0,
-        y = 0,
-        z = 0,
-        model = model 
-      })
-
-    end
-  end
-
-}
-
-return gltf
diff --git a/src/ext/janusxr/main.lua b/src/ext/janusxr/main.lua
index 457d939..acfab83 100644
--- a/src/ext/janusxr/main.lua
+++ b/src/ext/janusxr/main.lua
@@ -1,4 +1,5 @@
 local api = ...
+local ecs = api.ecs
 local util = api.util
 
 return {
@@ -6,30 +7,37 @@ return {
   enabled = true,
 
   init = function() 
+    JMLLoader = ecs.processingSystem()
+    JMLLoader.updatesystem = true 
+    JMLLoader.filter = ecs.requireAll('URL', 'method', 'data', 'ok')
+    function JMLLoader:process(req, dt)
+      if req.ok and req.xml == nil then
 
-    local xml     = api.parser.xml.newParser()
-    local xmlstr  = [[
-      <room use_local_asset="room3">
-        <object id="foo.glb"/>
-        <object id="cube"/>
-      </room>
-    ]]
-    util.traverseXML( xml:ParseXmlText(xmlstr),  function(node,raw)
-      print_r(node)
-    end)
+        -- JML heuristic
+        if req.data.find("<fireboxroom>") or req.data.match("<room[ >]") then
+
+          local JML0
+          local JML
+          req.xml       = api.parser.xml.newParser()
+          local xmlstr  = req.data
+          -- cleanup JML0
+          local JML0 = xmlstr:gsub("[=%w].*<room>","<fireboxroom")
+          JML0       = JML0:gsub("[=%w]</room>","</room>")
+          util.traverseXML( req.xml:ParseXmlText(JML0),  function(node,raw)
+            print_r(node)
+          end)
+          os.exit()
+          --api.world.add({ 
+          --  x = 0,
+          --  y = 0,
+          --  z = 0,
+          --  model = req.model,
+          --  req = req
+          --})
+        end
+      end
+    end
+    api.world.add(JMLLoader)
 
   end,
-
-  renderURI = function(ctx)
-    -- TODO:
-    --     janusxr should be an ECS SYSTEM respond to inserted xmls
-    --     gltf should be a ECS SYSTEM respond to inserted objects
-    --     browser should insert url response to entity (respond to 404 + autodelete entity e.g.)
-    --
-    --local URL = ctx.URL
-    --local me  = api.ext.gltf
-    --if ctx.succes and URL.extension == 'GLB' or URL.extension == 'GLTF' then
-
-    --end
-  end
 }
diff --git a/src/ext/xrfragments/main.lua b/src/ext/xrfragments/main.lua
index 8fa3445..efc096c 100644
--- a/src/ext/xrfragments/main.lua
+++ b/src/ext/xrfragments/main.lua
@@ -6,20 +6,23 @@ return {
   enabled = true,
   init = function()
     -- create a (ecs) system which detects add/remove entities
-    local ecs = api.ecs
+    local ecs   = api.ecs
     xrfsystem = ecs.system({
 
-      filter = ecs.filter('x&y&z'),
+      filter = ecs.filter('x', 'y', 'z', 'model'),
 
       onAdd = function(self,obj)
-        xrf.traverseNodesContaining('href', obj, 
-          xrf.makeClickable( api.ecs.worldPhysics, 
-            function(obj, collider)
-              print(obj['name'] .. ".href => " .. obj['extras']['href'] )
-              api.ecs.add( ecs.world, {collider = collider})
-            end
+
+        if lovr ~= nil then 
+          xrf.traverseNodesContaining('href', obj, 
+            xrf.makeClickable( api.ecs.worldPhysics, 
+              function(obj, collider)
+                print(obj['name'] .. ".href => " .. obj['extras']['href'] )
+                api.world.add({collider = collider})
+              end
+            )
           )
-        )
+        end
       end,
 
       onRemove = function(self,obj)
@@ -27,7 +30,7 @@ return {
       end
 
     })
-    ecs.addSystem( ecs.world, xrfsystem )
+    ecs.addSystem( api.world, xrfsystem )
 
   end
 }
diff --git a/src/lovr/main.lua b/src/lovr/main.lua
index 444982a..a2824e4 100644
--- a/src/lovr/main.lua
+++ b/src/lovr/main.lua
@@ -13,8 +13,11 @@ iui.resourcePath = "lovr/" .. iui.resourcePath
 backend.resourcePath = "lovr/" .. backend.resourcePath
 api.iui = iui
 api.backend = backend
+-- decorate api
+api.protocol.http = require('http')
 local ecs = api.ecs
 
+
 -- ecs systems
 local interactionsUpdater
 local renderer
@@ -49,7 +52,7 @@ function lovr.update(dt)
         lovr.event.quit()
     end
     
-    ecs.update( ecs.world, dt, ecs.filter('updatesystem') )
+    ecs.update( api.world, dt, ecs.filter('updatesystem') )
 
     iui.beginFrame(dt)
 
@@ -89,7 +92,7 @@ function lovr.draw(pass)
     end
 
     api.exec(api.ext, "draw",pass)
-    ecs.update( ecs.world, pass, ecs.filter('drawsystem') )
+    ecs.update( api.world, pass, ecs.filter('drawsystem') )
 
      -- Dot
     if selectedBox then
@@ -129,7 +132,7 @@ if launch.mode == "desktop" then
     function lovr.mousereleased(x, y, button)
         backend.mousereleased(x, y, button)
         interactionsUpdater['mouse']['released'] = {x=x, y=y, button=button}
-        print("ja")
+        print("mouserelease")
     end
 
     function lovr.wheelmoved(x, y)
@@ -151,8 +154,6 @@ if launch.mode == "desktop" then
 end
 
 local initECS = function(ecs)
-  ecs.world   = ecs.world()
-
   -- lovr.draw => ecs.drawsystem (render-logic thread)
   renderer = ecs.processingSystem()
   renderer.filter     = ecs.requireAny('model')
@@ -169,7 +170,7 @@ local initECS = function(ecs)
         1, 0, 1, 0, 0, 1)
     end
   end
-  ecs.addSystem( ecs.world, renderer )
+  ecs.addSystem( api.world, renderer )
 
   -- lovr.update => ecs updatesystem (game-logic thread)
   local updater = ecs.processingSystem()
@@ -178,7 +179,7 @@ local initECS = function(ecs)
   function updater:process(obj, dt)
     print_r(obj['data'])
   end
-  ecs.addSystem( ecs.world, updater )
+  ecs.addSystem( api.world, updater )
 
 end
 
@@ -217,7 +218,7 @@ function initInteractions(ecs)
     mouse['released'] = false
     mouse['pressed'] = false
   end
-  ecs.addSystem( ecs.world, interactionsUpdater )
+  ecs.addSystem( api.world, interactionsUpdater )
 end
 
 initECS(api.ecs)
diff --git a/src/main.lua b/src/main.lua
index f02a55a..164a677 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -1,32 +1,41 @@
 local util = require("util")
+local  ecs = require("tiny-ecs")
 
 api = {
   parser   = {
     json   = require("json"),
     xml    = require("xmlSimple"),
   },
-  browser  = require("browser"),
   url      = require("url"),
   util     = require("util"),
-  ecs      = require("tiny-ecs"),
+  ecs      = ecs,
+  world    = ecs.world(),
+  protocol = {},
   ext      = {}, -- all extensions loaded from disk at runtime
   exec     = function(...) util.exec(...) end -- calls function on each table item
 }
-if lovr ~= nil then 
-  api = util.merge( api, lovr )
-  api['protocol'] = {
-    http   = require('http')
-  },
-  util.loaddir( "ext",   api, api.ext )
-  util.loaddir( "media", api, api.media )
-  require("lovr/main")
-  api.exec( api.ext, 'init')
-end
+
+-- convenience wrappers
+api.world.add    = function(...) api.ecs.add( api.world, ...) end
+api.world.remove = function(...) api.ecs.remove( api.world, ...) end
+
+local runtime
+local runtimepath
+
+if lovr ~= nil then runtime = { path = "lovr", api = lovr }  end 
+if love ~= nil then runtime = { path = "love", api = love }  end 
+
+api = util.merge( api, runtime.api )
+util.loaddir( "ext",   api, api.ext )
+util.loaddir( "media", api, api.media )
+  
+api.exec( api.ext, 'init')
+require( runtime.path .. "/main")
 
 local url='https://coderofsalvation.codeberg.page/xrfragment-haxe/example/assets/example.glb?bar=1&f=2#foo'
 --local url = 'https://codeberg.org/coderofsalvation/xrfragment/raw/branch/main/assets/template/website/website.glb'
 --local url = 'https://codeberg.org/coderofsalvation/xrfragment/raw/branch/main/assets/simple-a.glb'
+--local url = 'https://janusxr.org/index.html'
 
-if lovr ~= nil then -- TODO: make this work for LOVE2D too
-  api.browser.to(url)
-end
+
+api.world.add({ url = url, method = 'GET' })