diff --git a/Changes.md b/Changes.md
index 8e1ae6b..d329e93 100644
--- a/Changes.md
+++ b/Changes.md
@@ -3,11 +3,13 @@ WebPerl Changelog
 =================
 
 
-not yet released: v0.05-beta
+2018-09-02: v0.05-beta
 ----------------------------
 - Added Perl.addStateChangeListener and deprecated Perl.stateChanged
 - Added WebPerl::js_new()
-- ...
+- Added regex_tester.html
+- Added Perl.noMountIdbfs
+- A few other minor fixes and updates
 
 
 2018-08-14: v0.03-beta
diff --git a/web/regex_tester.html b/web/regex_tester.html
index 1781907..85b40a3 100644
--- a/web/regex_tester.html
+++ b/web/regex_tester.html
@@ -91,8 +91,8 @@ textarea.samp_ta {
 </style>
 
 <script src="webperl.js"></script>
-<!--script src="https://webperlcdn.zero-g.net/v0.03-beta/webperl.js"
-	integrity="sha256-PWdMdWEx3axFU/29XiOPUwenmlsBM+5f+kc2omoKxPs=" crossorigin="anonymous"></script-->
+<!--script src="https://webperlcdn.zero-g.net/v0.05-beta/webperl.js"
+	integrity="sha256-0RqUAQu0lcyxE1cPEuyrchvz0YkDITr41FYfTL4Prtk" crossorigin="anonymous"></script-->
 <script src="https://code.jquery.com/jquery-3.3.1.min.js"
 	integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 
diff --git a/web/webperl.js b/web/webperl.js
index aa1ecc6..e7d2fd6 100644
--- a/web/webperl.js
+++ b/web/webperl.js
@@ -27,6 +27,8 @@ var Module;
 var Perl = {
 	trace: false,         // user may enable this
 	endAfterMain: false,  // user may enable this (before Perl.init)
+	noMountIdbfs: false,  // user may enable this (before Perl.start)
+	WebPerlVersion: 'v0.05-beta',
 	Util: {},
 	// internal variables:
 	initStepsLeft: 2, // Must match number of Perl.initStepFinished() calls!
@@ -51,7 +53,10 @@ var Perl = {
 
 /* TODO: Embedded script should be able to influence the running of Perl,
  * the cleanest would probably be to set properties on the Perl object,
- * such as Perl.autorun = false or Perl.argv = [...]. */
+ * such as Perl.autorun = false or Perl.argv = [...]. It should be possible
+ * for the user to do this for embedded scripts also! Will probably need
+ * to change the initialization of Perl so that the user can set its properties
+ * *before* loading webperl.js. */
 
 window.addEventListener("load", function () {
 	// Note: to get the content of script tags with jQuery: $('script[type="text/perl"]').html()
@@ -223,6 +228,11 @@ Perl.init = function (readyCallback) {
 		},
 		preRun: [
 			function () {
+				if (Perl.noMountIdbfs) {
+					console.debug("Perl: doing preRun, skipping IndexDB filesystem");
+					Perl.initStepFinished();
+					return;
+				}
 				console.debug("Perl: doing preRun, fetching IndexDB filesystem...");
 				try { FS.mkdir('/mnt'); } catch(e) {}
 				try { FS.mkdir('/mnt/idb'); } catch(e) {}