diff --git a/editions/prerelease/tiddlers/Release 5.1.20.tid b/editions/prerelease/tiddlers/Release 5.1.20.tid
index ed896c952..50a0aed80 100644
--- a/editions/prerelease/tiddlers/Release 5.1.20.tid	
+++ b/editions/prerelease/tiddlers/Release 5.1.20.tid	
@@ -7,8 +7,56 @@ type: text/vnd.tiddlywiki
 
 //[[See GitHub for detailed change history of this release|https://github.com/Jermolene/TiddlyWiki5/compare/v5.1.19...v5.1.20]]//
 
+!! Major Improvements
+
+[[Added|https://github.com/Jermolene/TiddlyWiki5/commit/0ea00b59b0dcd3de003e92a6bc0b27814fd0ec81]] support for mathematical operations within filters.
+
+!! Plugin Improvements
+
+New and improved plugins:
+
+* New [[BrowserStorage Plugin]] for saving tiddlers in browser local storage
+* New [[Innerwiki Plugin]] for rendering TiddlyWiki screenshots
+
+!! Translation Improvements
+
+New and improved translations:
+
+* Chinese Simplified and Chinese Traditional
+
+
+!! Usability Improvements
+
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/commit/5a37a84a54f2dc9ccf106309b739cfa693bae3e3]] the plugin library to search all plugin fields
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/e5f3301c1c36e8add4ed89ab1bd53a9b68411d3f]] a warning when core JavaScript modules are overwritten via import
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/pull/3654]] prompt for references when renaming a tiddler
+
+!! Hackability Improvements
+
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/commit/94f143bf643e36e817d1dd5b678515853eed6aca]] optional autofocus for the text inputs in $:/AdvancedSearch (controlled by the same [[Hidden Setting: Search AutoFocus]] as the sidebar search)
+* [[Added|https://github.com/Jermolene/TiddlyWiki5/pull/3677]] support for deflate and gzip compression to the WebServer ListenCommand
+
+!! Bug Fixes
+
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/pull/3572]] overlapping dropdowns with sticky titles enabled
+* [[Removed|https://github.com/Jermolene/TiddlyWiki5/pull/3749]] apparently obsolete limitation of selection wrapping in text editor
+* [[Fixed|https://github.com/Jermolene/TiddlyWiki5/pull/3745]] bug in RevealWidget when stateTitle tiddler is missing
+
+!! Developer Bug Fixes and Improvements
 
 ! Contributors
 
 [[@Jermolene|https://github.com/Jermolene]] would like to thank the contributors to this release who have generously given their time to help improve TiddlyWiki:
 
+* [[@00SS|https://github.com/00SS]]
+* [[@admls|https://github.com/admls]]
+* [[@benwebber|https://github.com/benwebber]]
+* [[@bimlas|https://github.com/bimlas]]
+* [[@BramChen|https://github.com/BramChen]]
+* [[@BurningTreeC|https://github.com/BurningTreeC]]
+* [[@diego898|https://github.com/diego898]]
+* [[@dnebauer|https://github.com/dnebauer]]
+* [[@JesseWeinstein|https://github.com/JesseWeinstein]]
+* [[@kyrias|https://github.com/kyrias]]
+* [[@MarxSal|https://github.com/MarxSal]]
+* [[@the-kenny|https://github.com/the-kenny]]
diff --git a/editions/tw5.com/tiddlers/plugins/BrowserStorage Plugin.tid b/editions/tw5.com/tiddlers/plugins/BrowserStorage Plugin.tid
new file mode 100644
index 000000000..2f3a7012c
--- /dev/null
+++ b/editions/tw5.com/tiddlers/plugins/BrowserStorage Plugin.tid	
@@ -0,0 +1,18 @@
+created: 20190206181204119
+modified: 20190206181204119
+tags: OfficialPlugins
+title: BrowserStorage Plugin
+type: text/vnd.tiddlywiki
+
+The ~BrowserStorage Plugin enables TiddlyWiki to save tiddlers in [[browser local storage|https://en.wikipedia.org/wiki/Web_storage#localStorage]]. This means that changes are stored within the browser, and automatically re-applied any time the base wiki is reloaded.
+
+Browser local storage is not a panacea for TiddlyWiki:
+
+* Browsers limit the amount of local storage available to a page, typically to 5 or 10MB
+* Keeping personal data in browser local storage can lead to unexpected privacy violations
+* Browsers reserve the right to without warning delete data stored in local storage at any time
+* Browsers tie local storage to a URL which can lead to problems if you move a wiki to a URL previously occupied by a different wiki
+
+Please use this plugin with caution. There are a number of unresolved issues and open questions.
+
+The ~BrowserStorage Plugin can be installed from the plugin library.
diff --git a/plugins/tiddlywiki/browser-storage/readme.tid b/plugins/tiddlywiki/browser-storage/readme.tid
index 9b2fd664b..40c868adf 100644
--- a/plugins/tiddlywiki/browser-storage/readme.tid
+++ b/plugins/tiddlywiki/browser-storage/readme.tid
@@ -13,7 +13,6 @@ Browser local storage is not a panacea for TiddlyWiki:
 
 Please use this plugin with caution. There are a number of unresolved issues and open questions:
 
-* A somewhat user hostile error is raised when local storage is full
 * Innerwikis read the local storage of their parent wikis
 * This plugin does not interfere with the existing saver mechanism, so you'll still get warnings when refreshing the page, even if your changes are safely committed to local storage
 * Deleted tiddlers will be restored when the wiki is refreshed