Issue 370 - Right-clicked element is removed independent of created filter

lib/basedomain.js

 /*!
  * Parts of original code from ipv6.js <https://github.com/beaugunderson/javascript-ipv6>
  * Copyright 2011 Beau Gunderson
  * Available under MIT license <http://mths.be/mit>
  */
 
 const RE_V4 = /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|0x[0-9a-f][0-9a-f]?|0[0-7]{3})\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|0x[0-9a-f][0-9a-f]?|0[0-7]{3})$/i;
 const RE_V4_HEX = /^0x([0-9a-f]{8})$/i;
 const RE_V4_NUMERIC = /^[0-9]+$/;
 const RE_V4inV6 = /(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;
@@ skipping 140 matching lines @@
   {
     // Keep the empty string for invalid URIs.
   }
 
   extractHostFromURL._lastURL = url;
   extractHostFromURL._lastDomain = host;
   return host;
 }
 
 /**
+ * Extracts host name from the URL of the given frame. If the URL don't have host
+ * information (like about:blank or data: URLs) it falls back to the parent frame.
+ */
+function extractHostFromFrame(frame)
+{
+  var host = extractHostFromURL(frame.url);
+  if (!host)
+  {
+    var parentFrame = frame.parent;
+    if (parentFrame)
+      return extractHostFromFrame(parentFrame);
+  }
+  return host;
+}
+
+/**
+ * Strips the fragment from a URL.
+ */
+function stripFragmentFromURL(/**String*/ url)
+{
+  return url.replace(/#.*/, "");
+}
+
+/**
  * Parses URLs and provides an interface similar to nsIURI in Gecko, see
  * https://developer.mozilla.org/en-US/docs/XPCOM_Interface_Reference/nsIURI.
  * TODO: Make sure the parsing actually works the same as nsStandardURL.
  * @constructor
  */
 function URI(/**String*/ spec)
 {
   this.spec = spec;
   this._schemeEnd = spec.indexOf(":");
   if (this._schemeEnd < 0)
@@ skipping 76 matching lines @@
   },
   get path()
   {
     return this.spec.substring(this._hostPortEnd);
   },
   get prePath()
   {
     return this.spec.substring(0, this._hostPortEnd);
   }
 };