2 files changed, 15 insertions, 4 deletions
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index 78106319..4c2b18f7 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -62,10 +62,8 @@ class Popup {
             return;
         }
 
-        const doc = this.popup.contentDocument;
-        doc.open();
-        doc.write(content);
-        doc.close();
+        const doc = this.popup;
+        doc.srcdoc=content;
     }
 
     sendMessage(action, params, callback) {
diff --git a/ext/fg/js/range.js b/ext/fg/js/range.js
index 182e242c..0befe279 100644
--- a/ext/fg/js/range.js
+++ b/ext/fg/js/range.js
@@ -16,6 +16,19 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+// Polyfill caretRangeFromPoint() using the newer caretPositionFromPoint()
+if (!document.caretRangeFromPoint){
+    document.caretRangeFromPoint = function polyfillcaretRangeFromPoint(x,y){
+        let range = document.createRange();
+        let position = document.caretPositionFromPoint(x,y);
+        if (!position) {
+            return null;
+        }
+        range.setStart(position.offsetNode, position.offset);
+        range.setEnd(position.offsetNode, position.offset);
+        return range;
+    };
+}
 
 class Range {
     constructor(range) {