DOC-3243: Replaced deprecated browser APIs with modern equivalents. (#4039)

* DOC-3243: TinyMCE 8.4.0 Release Documentation and Community Changelog.

* Docs: DOC-3243 - Replaced deprecated browser APIs with modern equivalents.

Author: kemister85

antora.yml

@@ -26,7 +26,7 @@ asciidoc:
     # product variables
     productname: TinyMCE
     productmajorversion: 8
-    productminorversion: '8.3'
+    productminorversion: '8.4'
     ##### product name in codeblock
     prodnamecode: tinymce
     #### more names

modules/ROOT/pages/8.4.0-release-notes.adoc

@@ -2,7 +2,7 @@
 :release-version: 8.4.0
 :navtitle: {productname} {release-version}
 :description: Release notes for {productname} {release-version}
-:keywords: releasenotes, new, changes, bugfixes
+:keywords: releasenotes, new, changes, bugfixes, new features, improvements, changes, removals, deprecated, known issues
 :page-toclevels: 1
 
 include::partial$misc/admon-releasenotes-for-stable.adoc[]
@@ -13,8 +13,8 @@ include::partial$misc/admon-releasenotes-for-stable.adoc[]
 
 {productname} {release-version} was released for {enterpriseversion} and {cloudname} on Wednesday, February 4^th^, 2026. These release notes provide an overview of the changes for {productname} {release-version}, including:
 
-* xref:new-premium-plugin<s>[New Premium plugin<s>]
-* xref:new-open-source-plugin<s>[New Open Source plugin<s>]
+* xref:new-premium-plugins[New Premium plugin<s>]
+* xref:new-open-source-plugins[New Open Source plugins]
 * xref:accompanying-premium-plugin-changes[Accompanying Premium plugin changes]
 * xref:accompanying-premium-plugin-end-of-life-announcement[Accompanying Premium plugin end-of-life announcement]
 * xref:accompanying-open-source-plugin-end-of-life-announcement[Accompanying open source plugin end-of-life-announcement]
@@ -76,7 +76,14 @@ For information on the **Media Optimizer** plugin, see: xref:uploadcare.adoc[Med
 
 The {productname} {release-version} release includes an accompanying release of the **Full Page HTML** premium plugin.
 
-**Full Page HTML** includes the following fixes.
+**Full Page HTML** includes the following update.
+
+==== Replaced deprecated browser APIs with modern equivalents.
+// #TINY-13674
+
+Previously, the Full Page HTML plugin used deprecated `+escape+` and `+unescape+` JavaScript APIs for some protected content handling. Those APIs are no longer recommended for new code.
+
+In {productname} {release-version}, the plugin uses modern encoding APIs instead. This aligns the implementation with current browser guidance and improves reliability for protected content handling.
 
 ==== Pasting an HTML document was vulnerable to XSS attacks
 // #TINY-13673
@@ -124,6 +131,7 @@ In {productname} {release-version}, the document loading process in the Review E
 
 For information on the **Suggested Edits** plugin, see: xref:suggestededits.adoc[Suggested Edits].
 
+
 [[accompanying-premium-plugin-end-of-life-announcement]]
 == Accompanying Premium plugin end-of-life announcement
 
@@ -191,7 +199,6 @@ In {productname} {release-version}, a new xref:non-editable-content-options.adoc
 
 In {productname} {release-version}, the new xref:custom-view.adoc#view_show[`+view_show+`] option allows specifying which view to display when the editor is initialized. The option behaves similarly to `+sidebar_show+` but takes precedence for views; both sidebars and views can be configured to show on init.
 
-
 [[changes]]
 == Changes
 
@@ -223,6 +230,7 @@ In {productname} {release-version}, the new xref:custom-view.adoc#view_show[`+vi
 // #TINY-vwxyz1
 
 // CCFR here.
+
 === Directionality of Hebrew was incorrect
 // #TINY-13667