diff --git a/manifest.json b/manifest.json
index e2cc966..7e63d1f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -9,15 +9,19 @@
         "96": "icons/96.png",
         "128": "icons/128.png"
     },
-    "content_scripts": [
-        {
-            "matches": [
-                "http://*/*",
-                "https://*/*"
-            ],
-            "js": [
-                "replace.js"
-            ]
-        }
-    ]
+    "permissions": [
+        "tabs",
+        "webNavigation",
+        "webRequest",
+        "webRequestBlocking",
+        "http://*/maps/embed*",
+        "https://*/maps/embed*",
+        "http://*/maps*output=embed*",
+        "https://*/maps*output=embed*"
+    ],
+    "background": {
+        "scripts": [
+            "replace.js"
+        ]
+    }
 }
\ No newline at end of file
diff --git a/replace.js b/replace.js
index 9de5954..c830745 100644
--- a/replace.js
+++ b/replace.js
@@ -1,41 +1,48 @@
 "use strict";
 
+const patterns = [
+    'http://*/maps/embed*',
+    'https://*/maps/embed*',
+    'http://*/maps*output=embed*',
+    'https://*/maps*output=embed*'
+];
+
 const gLocales = ['com', 'de']; // TODO: collect more locales
 const matcher = new RegExp(
     `^(https?:\/\/)?(maps\.google\.(${gLocales.join('|')})\/maps\/?\?.*output=embed|(www\.)?google\.(${gLocales.join('|')})\/maps\/embed\/?\?)`
 );
 
-function matchMaps(iframeNode) {
-    return iframeNode.src.match(matcher);
-}
-
-function replaceMaps(iframeNode) {
-    const url_params = new URLSearchParams(iframeNode.src.split('?')[1]);
-    iframeNode.src = '';
-
-    // TODO: the hard part will be to interpret the real request params after the `?` and translate it for OSM
-    // Also we might have to intercept and discard the possible request to gmaps because they're not needed, because the gmap is replaced
-
-    iframeNode.id = iframeNode.id || 'map-' + `${Math.random()}`.split('.')[0];
+function editFrame(tabId, frameId) {
+    browser.webNavigation.getFrame({
+        tabId: tabId,
+        frameId: frameId
+    }).then(
+        (frameDetails) => {
+            console.log(frameDetails);
+            frameDetails.scrolling = 'no'; // trying to manipulate iframes attributes: not working
+        }
+    );
 }
 
-function changeMaps(iframeNode) {
-    if (matchMaps(iframeNode)) {
-        iframeNode.contentWindow.stop();
-        replaceMaps(iframeNode);
+function redirect(req) {
+    if (req.url.match(matcher)) {
+        const params = new URLSearchParams(req.url.split('?')[1]);
+        
+        console.log(req);
+        console.log(params);
+        //editFrame(req.tabId, req.frameId);
+        
+        return {
+            redirectUrl: 'https://www.openstreetmap.org/export/embed.html?bbox=-12.041015625000002%2C44.32384807250689%2C27.465820312500004%2C57.397624055000456&layer=mapnik'
+        };
     }
 }
 
-Array.from(document.getElementsByTagName('iframe')).forEach(changeMaps);
-
-const observer = new MutationObserver(mutations => {
-    for (let mutation of mutations) {
-        for (let node of mutation.addedNodes) {
-            if (node.nodeName === 'iframe') {
-                changeMaps(node);
-            }
-        }
-    }
-});
-
-observer.observe(document, { childList: true, subtree: true });
+browser.webRequest.onBeforeRequest.addListener(
+    redirect,
+    {
+        urls: patterns,
+        types: ['sub_frame']
+    },
+    ['blocking']
+);