From 223d5d6a2543ed149926a36a21d70cab2b9b7f40 Mon Sep 17 00:00:00 2001
From: ownedbywuigi <ownedbywuigi@gmail.com>
Date: Tue, 31 Mar 2026 20:30:49 +0100
Subject: [PATCH] Spoof to Firefox 128 for WebExtensions

---
 toolkit/components/webextensions/ext-runtime.js  |  4 +++-
 .../mozapps/extensions/internal/XPIProvider.jsm  | 11 ++++++++++-
 .../webextensions/internal/XPIProvider.jsm       | 16 ++++++++++++----
 3 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/toolkit/components/webextensions/ext-runtime.js b/toolkit/components/webextensions/ext-runtime.js
index aed3ffd4b0..9324e0ee43 100644
--- a/toolkit/components/webextensions/ext-runtime.js
+++ b/toolkit/components/webextensions/ext-runtime.js
@@ -94,7 +94,9 @@ extensions.registerSchemaAPI("runtime", "addon_parent", context => {
 
       getBrowserInfo: function() {
         const {name, vendor, version, appBuildID} = Services.appinfo;
-        const info = {name, vendor, version, buildID: appBuildID};
+        // Override version for WebExtensions compatibility with modern extensions
+        // Report as Firefox 128.0 to extensions while maintaining actual UXP identity
+        const info = {name: "Firefox", vendor, version: "128.0", buildID: appBuildID};
         return Promise.resolve(info);
       },
 
diff --git a/toolkit/mozapps/extensions/internal/XPIProvider.jsm b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
index fbb1b3e8b6..c2ca8ab8a9 100644
--- a/toolkit/mozapps/extensions/internal/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
@@ -6380,6 +6380,10 @@ AddonInternal.prototype = {
     let version;
     if (app.id == Services.appinfo.ID) {
       version = aAppVersion;
+      // For WebExtensions, report as Firefox 128.0 for compatibility
+      if (this.type == "extension") {
+        version = "128.0";
+      }
 #ifdef MOZ_PHOENIX_EXTENSIONS
       this.native = true;
     }
@@ -6391,10 +6395,15 @@ AddonInternal.prototype = {
 #endif
     }
     else if (app.id == TOOLKIT_ID) {
+      // For WebExtensions against toolkit, report as Firefox 128.0
+      if (this.type == "extension") {
+        version = "128.0";
+      } else {
+        version = aPlatformVersion;
+      }
 #ifdef MOZ_PHOENIX_EXTENSIONS
       this.native = true;
 #endif
-      version = aPlatformVersion;
     }
 
     // Only extensions and dictionaries can be compatible by default; themes
diff --git a/toolkit/mozapps/webextensions/internal/XPIProvider.jsm b/toolkit/mozapps/webextensions/internal/XPIProvider.jsm
index 4dcb5267d9..24ea811ada 100644
--- a/toolkit/mozapps/webextensions/internal/XPIProvider.jsm
+++ b/toolkit/mozapps/webextensions/internal/XPIProvider.jsm
@@ -7001,12 +7001,20 @@ AddonInternal.prototype = {
       aPlatformVersion = Services.appinfo.platformVersion;
 
     let version;
-    if (app.id == Services.appinfo.ID)
-      version = aAppVersion;
+    if (app.id == Services.appinfo.ID) {
+      // For WebExtensions, report as Firefox 128.0 for compatibility
+      if (this.type == "extension") {
+        version = "128.0";
+      } else {
+        version = aAppVersion;
+      }
+    }
     else if (app.id == TOOLKIT_ID)
       version = aPlatformVersion
-    else if (app.id == WEBEXTENSIONS_ID)
-      version = WEBEXTENSIONS_VERSION
+    else if (app.id == WEBEXTENSIONS_ID) {
+      // For WebExtensions, report as Firefox 128.0
+      version = "128.0";
+    }
 
     // Only extensions and dictionaries can be compatible by default; themes
     // and language packs always use strict compatibility checking.