diff --git a/editor/embedapi-dom.js b/editor/embedapi-dom.js
index 36a6c5a3..e4a3d51e 100644
--- a/editor/embedapi-dom.js
+++ b/editor/embedapi-dom.js
@@ -93,7 +93,7 @@ function exportPDF () {
 const frameBase = 'https://raw.githack.com/SVG-Edit/svgedit/master';
 // const frameBase = 'http://localhost:8001';
 const framePath = '/editor/xdomain-svg-editor-es.html?extensions=ext-xdomain-messaging.js';
-const iframe = $('<iframe width="900px" height="600px" id="svgedit"></iframe>');
+const iframe = $('<iframe width="900px" height="600px" id="svgedit" src="javascript:0"></iframe>');
 iframe[0].src = frameBase + framePath +
   (location.href.includes('?')
     // ? location.href.replace(/\?(?<search>.*)$/, '&$<search>')
diff --git a/editor/extensions/ext-imagelib.js b/editor/extensions/ext-imagelib.js
index 773d0818..87a9f875 100644
--- a/editor/extensions/ext-imagelib.js
+++ b/editor/extensions/ext-imagelib.js
@@ -381,7 +381,7 @@ export default {
         const allLibs = imagelibStrings.select_lib;
 
         const libOpts = $('<ul id=imglib_opts>').appendTo(browser);
-        const frame = $('<iframe/>').prependTo(browser).hide().wrap('<div id=lib_framewrap>');
+        const frame = $('<iframe src="javascript:0"/>').prependTo(browser).hide().wrap('<div id=lib_framewrap>');
 
         const header = $('<h1>').prependTo(browser).text(allLibs).css({
           position: 'absolute',
diff --git a/editor/extensions/ext-server_moinsave.js b/editor/extensions/ext-server_moinsave.js
index f830f3d0..6725c255 100644
--- a/editor/extensions/ext-server_moinsave.js
+++ b/editor/extensions/ext-server_moinsave.js
@@ -22,7 +22,7 @@ export default {
     //    with `getBBox` in browser.js `supportsPathBBox_`)
     /* const target = */ $(
       `<iframe name="output_frame" title="${strings.hiddenframe}"
-        style="width: 0; height: 0;" src="#"/>`
+        style="width: 0; height: 0;" src="data:text/html;base64,PGh0bWw+PC9odG1sPg=="/>`
     ).appendTo('body');
 
     svgEditor.setCustomHandlers({
diff --git a/editor/extensions/ext-server_opensave.js b/editor/extensions/ext-server_opensave.js
index e9879996..86149dd6 100644
--- a/editor/extensions/ext-server_opensave.js
+++ b/editor/extensions/ext-server_opensave.js
@@ -74,7 +74,7 @@ export default {
     //    with `getBBox` in browser.js `supportsPathBBox_`)
     $(
       `<iframe name="output_frame" title="${strings.hiddenframe}"
-          style="width: 0; height: 0;" src="#"/>`
+          style="width: 0; height: 0;" src="data:text/html;base64,PGh0bWw+"/>`
     ).appendTo('body');
     svgEditor.setCustomHandlers({
       save (win, data) {