diff --git a/_config.yml b/_config.yml
index 198012ce..7cf8d986 100644
--- a/_config.yml
+++ b/_config.yml
@@ -59,6 +59,6 @@ colors:  #in hex code if not noted else
 versions:
   scalaJS: 1.0.1
   scalaJSBinary: 1
-  scalaJS06x: 0.6.32
+  scalaJS06x: 0.6.33
   scalaJS06xBinary: 0.6
   scalaJSDOM: 1.0.0
diff --git a/_posts/news/2020-05-13-announcing-scalajs-0.6.33.md b/_posts/news/2020-05-13-announcing-scalajs-0.6.33.md
new file mode 100644
index 00000000..d607ccb1
--- /dev/null
+++ b/_posts/news/2020-05-13-announcing-scalajs-0.6.33.md
@@ -0,0 +1,74 @@
+---
+layout: post
+title: Announcing Scala.js 0.6.33
+category: news
+tags: [releases]
+permalink: /news/2020/05/13/announcing-scalajs-0.6.33/
+---
+
+
+We are pleased to announce the release of Scala.js 0.6.33!
+
+This is mostly a bugfix release, including a fix for a bad interaction with React.js' development mode and the `jsdom` JS env.
+In addition, we have upgraded to the standard libraries of Scala 2.12.11 and 2.13.2.
+
+Read on for more details.
+
+<!--more-->
+
+## Getting started
+
+If you are new to Scala.js, head over to
+[the tutorial]({{ BASE_PATH }}/tutorial/).
+
+## Release notes
+
+If you use `.scala` build files in `project/` and are upgrading from Scala.js 0.6.22 or earlier, do read [the release notes of 0.6.23]({{ BASE_PATH }}/news/2018/05/22/announcing-scalajs-0.6.23/), which contain a source breaking change in that situation.
+
+If upgrading from Scala.js 0.6.14 or earlier, make sure to read [the release notes of 0.6.15]({{ BASE_PATH }}/news/2017/03/21/announcing-scalajs-0.6.15/), which contain important migration information.
+
+As a minor release, 0.6.33 is backward binary compatible with previous releases in the 0.6.x series.
+Libraries compiled with earlier versions can be used with 0.6.33 without change.
+0.6.33 is also forward binary compatible with 0.6.{29-32}, but not with earlier releases: libraries compiled with 0.6.33 cannot be used by projects using 0.6.{0-28}.
+
+Please report any issues [on GitHub](https://github.com/scala-js/scala-js/issues).
+
+## New warnings
+
+In Scala.js 0.6.33, the Scala.js compiler will start reporting warnings when trying to override `equals` and `hashCode` in a JS type (extending `js.Any`).
+For example:
+
+{% highlight scala %}
+class A extends js.Object {
+  override def hashCode(): Int = 1
+  override def equals(obj: Any): Boolean = false
+}
+{% endhighlight %}
+
+will report the following warnings:
+
+{% highlight none %}
+Test.scala:6: warning: Overriding hashCode in a JS class does not change its hash code.
+  To silence this warning, change the name of the method and optionally add @JSName("hashCode").
+  override def hashCode(): Int = 1
+               ^
+Test.scala:7: warning: Overriding equals in a JS class does not change how it is compared.
+  To silence this warning, change the name of the method and optionally add @JSName("equals").
+  override def equals(obj: Any): Boolean = false
+               ^
+{% endhighlight %}
+
+Overriding `equals` and `hashCode` never *worked*, in the sense that it would not affect `==` and `##`.
+The new warnings make it clear.
+
+## Bug fixes
+
+Among others, the following bugs have been fixed in 0.6.33:
+
+* [#4034](https://github.com/scala-js/scala-js/issues/4034) Incorrect result for `-x` when `x` is `+0.0`
+* [#3998](https://github.com/scala-js/scala-js/issues/3998) Self-types in non-native JS traits cause confusing error message
+* [#3458](https://github.com/scala-js/scala-js/issues/3458) Bad interactions in `JSDOMNodeJSEnv` error handling with React.js dev mode
+* [#3818](https://github.com/scala-js/scala-js/issues/3818) Linking error for `Future.never` from Scala 2.13
+* [#3939](https://github.com/scala-js/scala-js/issues/3939) Compile error on a method with `@JSName("finalize")` in a non-native JS class
+
+You can find the full list [on GitHub](https://github.com/scala-js/scala-js/issues?q=is%3Aissue+milestone%3Av0.6.33+is%3Aclosed).
diff --git a/doc/all-api.md b/doc/all-api.md
index 654fae38..bc365e81 100644
--- a/doc/all-api.md
+++ b/doc/all-api.md
@@ -5,6 +5,17 @@ title: All previous versions of the Scala.js API
 
 ## All previous versions of the API
 
+### Scala.js 0.6.33
+* [0.6.33 scalajs-library]({{ site.production_url }}/api/scalajs-library/0.6.33/#scala.scalajs.js.package)
+* [0.6.33 scalajs-test-interface]({{ site.production_url }}/api/scalajs-test-interface/0.6.33/)
+* [0.6.33 scalajs-stubs]({{ site.production_url }}/api/scalajs-stubs/0.6.33/)
+* [0.6.33 scalajs-ir]({{ site.production_url }}/api/scalajs-ir/0.6.33/#org.scalajs.core.ir.package)
+* [0.6.33 scalajs-tools]({{ site.production_url }}/api/scalajs-tools/0.6.33/#org.scalajs.core.tools.package) ([Scala.js version]({{ site.production_url }}/api/scalajs-tools-js/0.6.33/#org.scalajs.core.tools.package))
+* [0.6.33 scalajs-js-envs]({{ site.production_url }}/api/scalajs-js-envs/0.6.33/#org.scalajs.jsenv.package)
+* [0.6.33 scalajs-js-envs-test-kit]({{ site.production_url }}/api/scalajs-js-envs-test-kit/0.6.33/#org.scalajs.jsenv.test.package)
+* [0.6.33 scalajs-test-adapter]({{ site.production_url }}/api/scalajs-sbt-test-adapter/0.6.33/#org.scalajs.testadapter.package)
+* [0.6.33 sbt-scalajs]({{ site.production_url }}/api/sbt-scalajs/0.6.33/#org.scalajs.sbtplugin.package)
+
 ### Scala.js 1.0.1
 * [1.0.1 scalajs-library]({{ site.production_url }}/api/scalajs-library/1.0.1/scala/scalajs/js/index.html)
 * [1.0.1 scalajs-test-interface]({{ site.production_url }}/api/scalajs-test-interface/1.0.1/)
diff --git a/doc/internals/downloads.md b/doc/internals/downloads.md
index 757dea74..0ac4b3b0 100644
--- a/doc/internals/downloads.md
+++ b/doc/internals/downloads.md
@@ -7,6 +7,16 @@ We strongly recommend using the SBT plugin, as shown in the [bootstrapping skele
 
 The CLI distribution requires `scala` and `scalac` (of the right major version) to be on the execution path. Unpack it wherever you like and add the `bin/` folder to your execution path.
 
+#### Scala.js 0.6.33
+* [0.6.33, Scala 2.13 (tgz, 23MB)]({{ site.production_url }}/files/scalajs_2.13-0.6.33.tgz)
+* [0.6.33, Scala 2.13 (zip, 23MB)]({{ site.production_url }}/files/scalajs_2.13-0.6.33.zip)
+* [0.6.33, Scala 2.12 (tgz, 30MB)]({{ site.production_url }}/files/scalajs_2.12-0.6.33.tgz)
+* [0.6.33, Scala 2.12 (zip, 30MB)]({{ site.production_url }}/files/scalajs_2.12-0.6.33.zip)
+* [0.6.33, Scala 2.11 (tgz, 36MB)]({{ site.production_url }}/files/scalajs_2.11-0.6.33.tgz)
+* [0.6.33, Scala 2.11 (zip, 36MB)]({{ site.production_url }}/files/scalajs_2.11-0.6.33.zip)
+* [0.6.33, Scala 2.10 (tgz, 30MB)]({{ site.production_url }}/files/scalajs_2.10-0.6.33.tgz)
+* [0.6.33, Scala 2.10 (zip, 30MB)]({{ site.production_url }}/files/scalajs_2.10-0.6.33.zip)
+
 #### Scala.js 1.0.0
 * [1.0.0, Scala 2.13 (tgz, 21MB)]({{ site.production_url }}/files/scalajs_2.13-1.0.0.tgz)
 * [1.0.0, Scala 2.13 (zip, 21MB)]({{ site.production_url }}/files/scalajs_2.13-1.0.0.zip)
diff --git a/doc/internals/version-history.md b/doc/internals/version-history.md
index ba9c0caa..c87cb3f5 100644
--- a/doc/internals/version-history.md
+++ b/doc/internals/version-history.md
@@ -5,6 +5,7 @@ title: Version history
 
 ## Version history of Scala.js
 
+- [0.6.33](/news/2020/05/13/announcing-scalajs-0.6.33/)
 - [1.0.1](/news/2020/03/10/announcing-scalajs-1.0.1/)
 - [1.0.0](/news/2020/02/25/announcing-scalajs-1.0.0/)
 - [0.6.32](/news/2020/01/24/announcing-scalajs-0.6.32/)