diff --git a/AUTHORS b/AUTHORS
index 59e0cbbf64..ad6873d9b2 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -299,6 +299,7 @@ Hanzhao Deng
 Harald Schilly
 Hardest
 Harshvardhan Gupta
+Hasan Delibaş
 Hasan Karahan
 Heanes
 Hector Oswaldo Caballero
@@ -320,6 +321,7 @@ Ian Wetherbee
 Ice White
 ICHIKAWA, Yuji
 idleberg
+Igor Petruk
 ilvalle
 Ilya Kharlamov
 Ingo Richter
@@ -374,6 +376,7 @@ Joel Einbinder
 joelpinheiro
 joewalsh
 Johan Ask
+Johannes
 John Connor
 John-David Dalton
 John Engler
@@ -444,6 +447,7 @@ Lanfei
 Lanny
 laobubu
 Laszlo Vidacs
+leaf
 leaf corcoran
 Lemmon
 Leo Baschy
@@ -601,10 +605,13 @@ noragrossman
 Norman Rzepka
 Nouzbe
 Oleksandr Yakovenko
+Olivia Ytterbrink
+Opender Singh
 opl-
 Oreoluwa Onatemowo
 oscar.lofwenhamn
 Oskar Segersvärd
+ossdev
 overdodactyl
 pablo
 pabloferz
@@ -752,6 +759,7 @@ Tako Schotanus
 Takuji Shimokawa
 Takuya Matsuyama
 Tarmil
+T. Brandon Ashley
 TDaglis
 tel
 Tentone
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6de8dab5c0..934eec6a38 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,35 @@
+## 5.50.0 (2019-12-20)
+
+### Bug fixes
+
+Make Shift-Delete to cut work on Firefox.
+
+[closetag addon](https://codemirror.net/demo/closetag.html): Properly handle self-closing tags.
+
+[handlebars mode](https://codemirror.net/mode/handlebars/): Fix triple-brace support.
+
+[searchcursor addon](https://codemirror.net/doc/manual.html#addon_searchcursor): Support mathing `$` in reverse regexp search.
+
+[panel addon](https://codemirror.net/doc/manual.html#addon_panel): Don't get confused by changing panel sizes.
+
+[javascript-hint addon](https://codemirror.net/doc/manual.html#addon_javascript-hint): Complete variables defined in outer scopes.
+
+[sublime bindings](https://codemirror.net/demo/sublime.html): Make by-subword motion more consistent with Sublime Text.
+
+[julia mode](https://codemirror.net/mode/julia/): Don't break on zero-prefixed integers.
+
+[elm mode](https://codemirror.net/mode/elm/): Sync with upstream version.
+
+[sql mode](https://codemirror.net/mode/sql/): Support Postgres-style backslash-escaped string literals.
+
+### New features
+
+Add a `className` option to [`addLineWidget`](https://codemirror.net/doc/manual.html#addLineWidget).
+
+[foldcode addon](https://codemirror.net/doc/manual.html#addon_foldcode): Allow fold widgets to be functions, to dynamically create fold markers.
+
+New themes: [ayu-dark](https://codemirror.net/demo/theme.html#ayu-dark) and [ayu-mirage](https://codemirror.net/demo/theme.html#ayu-mirage).
+
 ## 5.49.2 (2019-10-21)
 
 ### Bug fixes
diff --git a/doc/manual.html b/doc/manual.html
index d693b784e4..b3a547124d 100644
--- a/doc/manual.html
+++ b/doc/manual.html
@@ -69,7 +69,7 @@
 <section class=first id=overview>
     <h2 style="position: relative">
       User manual and reference guide
-      <span style="color: #888; font-size: 1rem; position: absolute; right: 0; bottom: 0">version 5.49.3</span>
+      <span style="color: #888; font-size: 1rem; position: absolute; right: 0; bottom: 0">version 5.50.0</span>
     </h2>
 
     <p>CodeMirror is a code-editor component that can be embedded in
diff --git a/doc/releases.html b/doc/releases.html
index 6d653194f9..7ed42c85d6 100644
--- a/doc/releases.html
+++ b/doc/releases.html
@@ -30,6 +30,24 @@ <h2>Release notes and version history</h2>
 
   <h2>Version 5.x</h2>
 
+  <p class="rel">20-12-2019: <a href="https://codemirror.net/codemirror-5.50.0.zip">Version 5.50.0</a>:</p>
+
+  <ul class="rel-note">
+    <li>Add a <code>className</code> option to <a href="https://codemirror.net/doc/manual.html#addLineWidget"><code>addLineWidget</code></a>.</li>
+    <li><a href="https://codemirror.net/doc/manual.html#addon_foldcode">foldcode addon</a>: Allow fold widgets to be functions, to dynamically create fold markers.</li>
+    <li>New themes: <a href="https://codemirror.net/demo/theme.html#ayu-dark">ayu-dark</a> and <a href="https://codemirror.net/demo/theme.html#ayu-mirage">ayu-mirage</a>.</li>
+    <li>Make Shift-Delete to cut work on Firefox.</li>
+    <li><a href="https://codemirror.net/demo/closetag.html">closetag addon</a>: Properly handle self-closing tags.</li>
+    <li><a href="https://codemirror.net/mode/handlebars/">handlebars mode</a>: Fix triple-brace support.</li>
+    <li><a href="https://codemirror.net/doc/manual.html#addon_searchcursor">searchcursor addon</a>: Support mathing <code>$</code> in reverse regexp search.</li>
+    <li><a href="https://codemirror.net/doc/manual.html#addon_panel">panel addon</a>: Don’t get confused by changing panel sizes.</li>
+    <li><a href="https://codemirror.net/doc/manual.html#addon_javascript-hint">javascript-hint addon</a>: Complete variables defined in outer scopes.</li>
+    <li><a href="https://codemirror.net/demo/sublime.html">sublime bindings</a>: Make by-subword motion more consistent with Sublime Text.</li>
+    <li><a href="https://codemirror.net/mode/julia/">julia mode</a>: Don’t break on zero-prefixed integers.</li>
+    <li><a href="https://codemirror.net/mode/elm/">elm mode</a>: Sync with upstream version.</li>
+    <li><a href="https://codemirror.net/mode/sql/">sql mode</a>: Support Postgres-style backslash-escaped string literals.</li>
+  </ul>
+
   <p class="rel">21-10-2019: <a href="https://codemirror.net/codemirror-5.49.2.zip">Version 5.49.2</a>:</p>
 
   <ul class="rel-note">
diff --git a/index.html b/index.html
index 4f771f4f8c..c955ecd308 100644
--- a/index.html
+++ b/index.html
@@ -99,7 +99,7 @@ <h2>This is CodeMirror</h2>
       </div>
     </div>
     <div class=actionsleft>
-      Get the current version: <a href="https://codemirror.net/codemirror.zip">5.49.2</a>.<br>
+      Get the current version: <a href="https://codemirror.net/codemirror.zip">5.50.0</a>.<br>
       You can see the <a href="https://github.com/codemirror/codemirror" title="Github repository">code</a>,<br>
       read the <a href="doc/releases.html">release notes</a>,<br>
       or study the <a href="doc/manual.html">user manual</a>.
diff --git a/package.json b/package.json
index da4bea1ac5..b0a9e21ee6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codemirror",
-  "version": "5.49.3",
+  "version": "5.50.0",
   "main": "lib/codemirror.js",
   "style": "lib/codemirror.css",
   "author": {
diff --git a/src/edit/main.js b/src/edit/main.js
index ff0760b624..c69f684ee0 100644
--- a/src/edit/main.js
+++ b/src/edit/main.js
@@ -66,4 +66,4 @@ import { addLegacyProps } from "./legacy.js"
 
 addLegacyProps(CodeMirror)
 
-CodeMirror.version = "5.49.3"
+CodeMirror.version = "5.50.0"
diff --git a/test/sublime_test.js b/test/sublime_test.js
index 09bb951247..b227bed8ce 100644
--- a/test/sublime_test.js
+++ b/test/sublime_test.js
@@ -60,7 +60,7 @@
     };
   }
 
-  stTest("bySubword", "the foo_bar DooDahBah \n a",
+  stTest("bySubword", "the foo_bar DooDahBah \n a FOOBar",
          "goSubwordLeft", at(0, 0),
          "goSubwordRight", at(0, 3),
          "goSubwordRight", at(0, 7),
@@ -71,7 +71,10 @@
          "goSubwordRight", at(0, 22),
          "goSubwordRight", at(1, 0),
          "goSubwordRight", at(1, 2),
-         "goSubwordRight", at(1, 2),
+         "goSubwordRight", at(1, 6),
+         "goSubwordRight", at(1, 9),
+         "goSubwordLeft", at(1, 6),
+         "goSubwordLeft", at(1, 3),
          "goSubwordLeft", at(1, 1),
          "goSubwordLeft", at(1, 0),
          "goSubwordLeft", at(0, 22),