diff --git a/application/basilisk/app/application.ini b/application/basilisk/app/application.ini
index 2da1cd3316..2ea0425fc1 100644
--- a/application/basilisk/app/application.ini
+++ b/application/basilisk/app/application.ini
@@ -25,7 +25,7 @@ RemotingName=@MOZ_APP_REMOTINGNAME@
 #ifdef MOZ_APP_DISPLAYNAME
 CodeName=@MOZ_APP_DISPLAYNAME@
 #endif
-Version=52.11.0
+Version=52.9.0
 #ifdef MOZ_APP_PROFILE
 Profile=@MOZ_APP_PROFILE@
 #endif
diff --git a/application/basilisk/app/hydra.exe.manifest b/application/basilisk/app/hydra.exe.manifest
deleted file mode 100644
index 7f777a4dc2..0000000000
--- a/application/basilisk/app/hydra.exe.manifest
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
-<assemblyIdentity
-        version="1.0.0.0"
-        processorArchitecture="*"
-        name="Eclipse Hydra"
-        type="win32"
-/>
-<description>Eclipse Hydra</description>
-<dependency>
-        <dependentAssembly>
-                <assemblyIdentity
-                        type="win32"
-                        name="Microsoft.Windows.Common-Controls"
-                        version="6.0.0.0"
-                        processorArchitecture="*"
-                        publicKeyToken="6595b64144ccf1df"
-                        language="*"
-                />
-        </dependentAssembly>
-</dependency>
-<ms_asmv3:trustInfo xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
-  <ms_asmv3:security>
-    <ms_asmv3:requestedPrivileges>
-      <ms_asmv3:requestedExecutionLevel level="asInvoker" uiAccess="false" />
-    </ms_asmv3:requestedPrivileges>
-  </ms_asmv3:security>
-</ms_asmv3:trustInfo>
-  <ms_asmv3:application xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
-    <ms_asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
-      <dpiAware>True/PM</dpiAware>
-      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2,PerMonitor</dpiAwareness>
-    </ms_asmv3:windowsSettings>
-  </ms_asmv3:application>
-  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
-    <application>
-      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
-      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
-      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
-      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
-      <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
-    </application>
-  </compatibility>
-</assembly>
diff --git a/application/basilisk/app/serpent.exe.manifest b/application/basilisk/app/serpent.exe.manifest
deleted file mode 100644
index 52e423ff7a..0000000000
--- a/application/basilisk/app/serpent.exe.manifest
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
-<assemblyIdentity
-        version="1.0.0.0"
-        processorArchitecture="*"
-        name="Serpent"
-        type="win32"
-/>
-<description>Serpent</description>
-<dependency>
-        <dependentAssembly>
-                <assemblyIdentity
-                        type="win32"
-                        name="Microsoft.Windows.Common-Controls"
-                        version="6.0.0.0"
-                        processorArchitecture="*"
-                        publicKeyToken="6595b64144ccf1df"
-                        language="*"
-                />
-        </dependentAssembly>
-</dependency>
-<ms_asmv3:trustInfo xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
-  <ms_asmv3:security>
-    <ms_asmv3:requestedPrivileges>
-      <ms_asmv3:requestedExecutionLevel level="asInvoker" uiAccess="false" />
-    </ms_asmv3:requestedPrivileges>
-  </ms_asmv3:security>
-</ms_asmv3:trustInfo>
-  <ms_asmv3:application xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
-    <ms_asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
-      <dpiAware>True/PM</dpiAware>
-      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2,PerMonitor</dpiAwareness>
-    </ms_asmv3:windowsSettings>
-  </ms_asmv3:application>
-  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
-    <application>
-      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
-      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
-      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
-      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
-      <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
-    </application>
-  </compatibility>
-</assembly>