From 6d00583a505780732511c1daf1fafc567e14f31b Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Tue, 6 Nov 2018 17:22:09 -0200
Subject: [PATCH] fix blob: case as per feedback
 https://github.com/uBlockOrigin/uBlock-issues/issues/283#issuecomment-436371415

---
 src/js/scriptlets/element-picker.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/js/scriptlets/element-picker.js b/src/js/scriptlets/element-picker.js
index 734d43be6..7d2300f24 100644
--- a/src/js/scriptlets/element-picker.js
+++ b/src/js/scriptlets/element-picker.js
@@ -512,6 +512,10 @@ var cosmeticFilterFromElement = function(elem) {
                     if ( pos !== -1 ) {
                         v = v.slice(0, pos + 1);
                     }
+                } else if ( v.startsWith('blob:') ) {
+                    v = new URL(v.slice(5));
+                    v.pathname = '';
+                    v = 'blob:' + v.href;
                 }
                 attributes.push({ k: 'src', v: v.slice(0, 256) });
                 break;