diff --git a/assets/assets.json b/assets/assets.json
index 8561d155..d49a8619 100644
--- a/assets/assets.json
+++ b/assets/assets.json
@@ -16,25 +16,6 @@
 			"assets/thirdparties/publicsuffix.org/list/effective_tld_names.dat"
 		]
 	},
-	"malware-0": {
-		"content": "filters",
-		"title": "Malware Domain List",
-		"contentURL": [
-			"https://www.malwaredomainlist.com/hostslist/hosts.txt",
-			"assets/thirdparties/www.malwaredomainlist.com/hostslist/hosts.txt"
-		]
-	},
-	"malware-1": {
-		"content": "filters",
-		"title": "Malware domains",
-		"contentURL": [
-			"https://mirror.cedia.org.ec/malwaredomains/justdomains",
-			"https://mirror1.malwaredomains.com/files/justdomains",
-			"assets/thirdparties/mirror1.malwaredomains.com/files/justdomains",
-			"assets/thirdparties/mirror1.malwaredomains.com/files/justdomains.txt"
-		],
-		"supportURL": "http://www.malwaredomains.com/"
-	},
 	"dpollock-0": {
 		"content": "filters",
 		"updateAfter": 11,
diff --git a/dist/version b/dist/version
index 9df886c4..1c99cf0e 100644
--- a/dist/version
+++ b/dist/version
@@ -1 +1 @@
-1.4.2
+1.4.4
diff --git a/src/js/storage.js b/src/js/storage.js
index 701fdb5a..c4706398 100644
--- a/src/js/storage.js
+++ b/src/js/storage.js
@@ -552,12 +552,22 @@
     var usedCount = this.ubiquitousBlacklist.count;
     var duplicateCount = this.ubiquitousBlacklist.duplicateCount;
 
-    this.mergeHostsFileContent(details.content);
+    // https://www.reddit.com/r/uMatrix/comments/ftebgz/
+    //   Be ready to deal with a removed asset.
+
+    if ( typeof details.content === 'string' && details.content !== '' ) {
+        this.mergeHostsFileContent(details.content);
+    }
 
     usedCount = this.ubiquitousBlacklist.count - usedCount;
     duplicateCount = this.ubiquitousBlacklist.duplicateCount - duplicateCount;
 
-    let hostsFileMeta = this.liveHostsFiles.get(details.assetKey);
+    const hostsFileMeta = this.liveHostsFiles.get(details.assetKey);
+    if ( hostsFileMeta === undefined ) {
+        this.liveHostsFiles.delete(details.assetKey);
+        return;
+    }
+
     hostsFileMeta.entryCount = usedCount + duplicateCount;
     hostsFileMeta.entryUsedCount = usedCount;
 };
diff --git a/tools/make-assets.sh b/tools/make-assets.sh
index 6d1f882b..692ad196 100644
--- a/tools/make-assets.sh
+++ b/tools/make-assets.sh
@@ -22,12 +22,10 @@ mkdir $DES/thirdparties
 pushd ../uAssets
 git checkout 84dc2761abb4193bb34290aa6d90266610f735f6
 popd
-cp -R ../uAssets/thirdparties/mirror1.malwaredomains.com $DES/thirdparties/
 cp -R ../uAssets/thirdparties/pgl.yoyo.org               $DES/thirdparties/
 cp -R ../uAssets/thirdparties/publicsuffix.org           $DES/thirdparties/
 cp -R ../uAssets/thirdparties/someonewhocares.org        $DES/thirdparties/
 cp -R ../uAssets/thirdparties/winhelp2002.mvps.org       $DES/thirdparties/
-cp -R ../uAssets/thirdparties/www.malwaredomainlist.com  $DES/thirdparties/
 mkdir $DES/umatrix
 cp -R ../uAssets/recipes/*                               $DES/umatrix/
 pushd ../uAssets