[userscript] add bypass-right-click-jacking-while-key-held

Introduce a new userscript that restores the native browser context menu when a modifier key
(default: Alt) is held during right-click, bypassing site scripts that hijack the menu.

- Add `bypass-right-click-jacking-while-key-held.user.js`
- Use capture-phase listener to intercept `contextmenu` events
- Suppress site handlers without calling `preventDefault()`
- Restore the native browser context menu only while a modifier key is held
- Include inline documentation and usage notes
- Update README to reference the new script

Author: 0xdevalias

README.md

@@ -5,6 +5,7 @@ My user scripts to add functionality to various sites around the web (that were
 ## Userscripts
 
 - [Amazon Prime Gaming Highlighter](./userscripts/amazon-prime-gaming-highlighter/) ([Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/amazon-prime-gaming-highlighter/amazon-prime-gaming-highlighter.user.js))
+- [Bypass Right-Click Jacking (While Key Held)](./userscripts/bypass-right-click-jacking-while-key-held/) ([Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js))
 - [ChatGPT Web App Script Update Notifier](./userscripts/chatgpt-web-app-script-update-notifier/) ([Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/chatgpt-web-app-script-update-notifier/chatgpt-web-app-script-update-notifier.user.js))
 - [Copy GitHub Repo Summary](./userscripts/copy-github-repo-summary/) ([Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/copy-github-repo-summary/copy-github-repo-summary.user.js))
 - [Freshdesk Make 'Redactor Editor' Resizeable](./userscripts/freshdesk-make-redactor-editor-resizeable/) ([Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/freshdesk-make-redactor-editor-resizeable/freshdesk-make-redactor-editor-resizeable.user.js))

userscripts/bypass-right-click-jacking-while-key-held/README.md

@@ -0,0 +1,19 @@
+# Bypass Right-Click Jacking (While Key Held)
+
+```javascript
+// ==UserScript==
+// @name          Bypass Right-Click Jacking (While Key Held)
+// @description   Bypass right-click jacking to restore the native browser context menu. While holding a modifier key (default: Alt), right-click to temporarily override site scripts that hijack the menu.
+// @author        Glenn 'devalias' Grant (devalias.net)
+// @homepageURL   https://github.com/0xdevalias/userscripts
+// @supportURL    https://github.com/0xdevalias/userscripts/issues
+// @downloadURL   https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js
+// @updateURL     https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js
+// @namespace     https://www.devalias.net/
+// @version       0.1
+// @match         *://*/*
+// @grant         none
+// ==/UserScript==
+```
+
+- [Install](https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js)

userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js

@@ -0,0 +1,41 @@
+// ==UserScript==
+// @name          Bypass Right-Click Jacking (While Key Held)
+// @description   Bypass right-click jacking to restore the native browser context menu. While holding a modifier key (default: Alt), right-click to temporarily override site scripts that hijack the menu.
+// @author        Glenn 'devalias' Grant (devalias.net)
+// @homepageURL   https://github.com/0xdevalias/userscripts
+// @supportURL    https://github.com/0xdevalias/userscripts/issues
+// @downloadURL   https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js
+// @updateURL     https://github.com/0xdevalias/userscripts/raw/main/userscripts/bypass-right-click-jacking-while-key-held/bypass-right-click-jacking-while-key-held.user.js
+// @namespace     https://www.devalias.net/
+// @version       0.1
+// @match         *://*/*
+// @grant         none
+// ==/UserScript==
+
+(function () {
+  'use strict';
+
+  // Change this to e.g. 'Meta', 'Shift', or 'Control' if you prefer
+  const modifierKeyName = 'Alt';
+
+  // Capture-phase listener: intercepts contextmenu events early.
+  //
+  // IMPORTANT: we do *not* call preventDefault() here — only stop page handlers,
+  // so the browser’s native context menu remains free to open when the key is held.
+  function captureContext(e) {
+    // Only intervene if the chosen modifier key is being held down at the moment of right-click
+    if (!e.getModifierState(modifierKeyName)) return;
+
+    // Block other listeners bound at the same target and phase
+    e.stopImmediatePropagation();
+
+    // Stop the event from bubbling up to parent elements
+    e.stopPropagation();
+  }
+
+  // Install listener in capture phase.
+  // The capture phase runs before bubbling, so we intercept the event
+  // before site scripts can cancel or hijack it. This ensures our handler
+  // has priority to allow the native browser menu when the key is held.
+  document.addEventListener('contextmenu', captureContext, true);
+})();