diff --git a/README.md b/README.md
index 4f0fa507..f9eeebea 100644
--- a/README.md
+++ b/README.md
@@ -429,6 +429,8 @@ Generate metrics that can be embedded everywhere, including your GitHub profile
 # 📚 Documentation
 
 
+> <sup>*⚠️ This is the documentation of **v3.31-beta** (`@master`/`@main` branches) which includes [unreleased features](https://github.com/lowlighter/metrics/compare/latest...master) planned for next release. See documentation for current released version [**v3.30** (`@latest` branch) here](https://github.com/lowlighter/metrics/blob/latest/README.md).* </sup>
+
 
 
 ## 🦮 Setup
diff --git a/source/plugins/community/screenshot/README.md b/source/plugins/community/screenshot/README.md
index 35b7fb12..f0f56a96 100644
--- a/source/plugins/community/screenshot/README.md
+++ b/source/plugins/community/screenshot/README.md
@@ -81,8 +81,7 @@
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>json</code>
+    <td nowrap="nowrap"><b>type:</b> <code>json</code>
 <br>
 <b>default:</b> <details><summary>→ Click to expand</summary><pre language="json"><code>{
   "width": 1280,
@@ -96,8 +95,7 @@
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>number</code>
+    <td nowrap="nowrap"><b>type:</b> <code>number</code>
 <i>(0 ≤
 𝑥)</i>
 <br>
diff --git a/source/plugins/community/splatoon/README.md b/source/plugins/community/splatoon/README.md
index 85e8b03a..4fe9365c 100644
--- a/source/plugins/community/splatoon/README.md
+++ b/source/plugins/community/splatoon/README.md
@@ -42,8 +42,7 @@ All product and company names are trademarks™ or registered® trademarks of th
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>boolean</code>
+    <td nowrap="nowrap"><b>type:</b> <code>boolean</code>
 <br>
 <b>default:</b> no<br></td>
   </tr>
@@ -54,7 +53,6 @@ All product and company names are trademarks™ or registered® trademarks of th
   </tr>
   <tr>
     <td nowrap="nowrap">🔐 Token<br>
-✨ On <code>master</code>/<code>main</code><br>
 🌐 Web instances must configure <code>settings.json</code>:
 <ul>
 <li><i>metrics.api.nintendo.splatnet</i></li>
@@ -73,8 +71,7 @@ All product and company names are trademarks™ or registered® trademarks of th
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>array</code>
+    <td nowrap="nowrap"><b>type:</b> <code>array</code>
 <i>(comma-separated)</i>
 <br>
 <b>default:</b> player, versus, salmon-run<br></td>
@@ -85,8 +82,7 @@ All product and company names are trademarks™ or registered® trademarks of th
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>number</code>
+    <td nowrap="nowrap"><b>type:</b> <code>number</code>
 <i>(0 ≤
 𝑥
 ≤ 6)</i>
@@ -99,8 +95,7 @@ All product and company names are trademarks™ or registered® trademarks of th
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-<b>type:</b> <code>number</code>
+    <td nowrap="nowrap"><b>type:</b> <code>number</code>
 <i>(0 ≤
 𝑥
 ≤ 6)</i>
@@ -115,8 +110,7 @@ Requires <a href="/source/plugins/community/splatoon/README.md#plugin_splatoon_s
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
-    <td nowrap="nowrap">✨ On <code>master</code>/<code>main</code><br>
-🌐 Web instances must configure <code>settings.json</code>:
+    <td nowrap="nowrap">🌐 Web instances must configure <code>settings.json</code>:
 <ul>
 <li><i>metrics.api.statink</i></li>
 </ul>
@@ -131,7 +125,6 @@ Requires <a href="/source/plugins/community/splatoon/README.md#plugin_splatoon_s
   </tr>
   <tr>
     <td nowrap="nowrap">🔐 Token<br>
-✨ On <code>master</code>/<code>main</code><br>
 <b>type:</b> <code>token</code>
 <br></td>
   </tr>
@@ -147,7 +140,6 @@ Requires <a href="/source/plugins/community/splatoon/README.md#plugin_splatoon_s
   <tr>
     <td nowrap="nowrap">⏯️ Cannot be preset<br>
 🔧 For development<br>
-✨ On <code>master</code>/<code>main</code><br>
 <b>type:</b> <code>string</code>
 <br>
 <b>default:</b> splatnet<br>
diff --git a/source/plugins/core/README.md b/source/plugins/core/README.md
index fb67beea..3a0a9952 100644
--- a/source/plugins/core/README.md
+++ b/source/plugins/core/README.md
@@ -1116,7 +1116,19 @@ This option has no effects on forks (images will always be rebuilt from Dockerfi
 <li><code>--cakeday</code>: simulate registration anniversary</li>
 <li><code>--halloween</code>: enable halloween colors</li>
 <li><code>--error</code>: force render error</li>
+<li><code>--puppeteer-debug</code>: enable puppeteer debug mode*</li>
+<li><code>--puppeteer-disable-headless</code>: disable puppeteer headless mode <em>(requires a graphical environment)</em>*</li>
+<li><code>--puppeteer-wait-load</code>: override puppeteer wait events*</li>
+<li><code>--puppeteer-wait-domcontentloaded</code>: override puppeteer wait events*</li>
+<li><code>--puppeteer-wait-networkidle0</code>: override puppeteer wait events*</li>
+<li><code>--puppeteer-wait-networkidle2</code>: override puppeteer wait events*</li>
 </ul>
+<blockquote>
+<p><em>* 🌐 Web instances needs to have <a href="/source/plugins/core/README.md#debug"><code>debug</code></a> set in <code>settings.json</code> for these flags to be supported.</em></p>
+</blockquote>
+<blockquote>
+<p>⚠️ No backward compatibility is guaranteed for these features, they are only meant for debugging purposes.</p>
+</blockquote>
 <img width="900" height="1" alt=""></td>
   </tr>
   <tr>
@@ -1125,7 +1137,7 @@ This option has no effects on forks (images will always be rebuilt from Dockerfi
 <b>type:</b> <code>array</code>
 <i>(space-separated)</i>
 <br>
-<b>allowed values:</b><ul><li>--cakeday</li><li>--halloween</li><li>--error</li></ul></td>
+<b>allowed values:</b><ul><li>--cakeday</li><li>--halloween</li><li>--error</li><li>--puppeteer-debug</li><li>--puppeteer-disable-headless</li><li>--puppeteer-wait-load</li><li>--puppeteer-wait-domcontentloaded</li><li>--puppeteer-wait-networkidle0</li><li>--puppeteer-wait-networkidle2</li></ul></td>
   </tr>
   <tr>
     <td nowrap="nowrap"><h4><code>debug_print</code></h4></td>