Bug 1858006 - make installer auto-pin on Win 11 pre-UBR 2361 builds. r=nalexander

The previous commits to shared.nsh resulted in auto-pinning only occurring in Windows 11 builds that weren't build number 22621 or higher, but a lot of users on Windows 11 are on 22621 already and the build number to pay attention to, when MS introduced the user confirmation for pinning popup, is in Windows 11, 22621, UBR 2361.
This commit checks for the UBR number too.

Differential Revision: https://phabricator.services.mozilla.com/D190859

browser/installer/windows/nsis/shared.nsh

@@ -1288,29 +1288,57 @@ ${RemoveDefaultBrowserAgentShortcut}
   Push $0
   Push $1
   Push $2
+  Push $3
 
   ${WinVerGetMajor} $0
   ${WinVerGetMinor} $1
   ${WinVerGetBuild} $2
 
+  ; Get the UBR; only documented way I could figure out how to get this reliably
+  ClearErrors
+  ReadRegDWORD $3 HKLM \
+    "Software\Microsoft\Windows NT\CurrentVersion" \
+    "UBR"
+
   ; It's not obvious how to use LogicLib itself within a LogicLib custom
-  ; operator, so we do everything by hand with `IntCmp`.  Success is when:
+  ; operator, so we do everything by hand with `IntCmp`.  The below lines
+  ; translate to:
+  ; StrCpy ${outvar} '0'  ; default to false
   ; ${If} $0 <= 10
-  ; ${AndIf} $1 <= 0
-  ; ${AndIf} $2 < 22621
-  ;   <success>
+  ;   ${If} $1 <= 0
+  ;     ${If} $2 < 22621
+  ;       StrCpy ${outvar} '1'
+  ;     ${ElseIf} $2 == 22621
+  ;       ${If} $3 < 2361
+  ;         StrCpy ${outvar} '1'
+  ;       ${Endif}
+  ;     ${EndIf}
+  ;  ${Endif}
   ; ${EndIf}
 
-  StrCpy ${outvar} '0'
+  StrCpy ${outvar} '0' ; default to false on pinning
+
+  ; If the major version is greater than 10, no pinning in setup
   IntCmp $0 10 "" "" ${pin_lbl}_bad
+
+  ; If the minor version is greater than 0, no pinning in setup
   IntCmp $1 0 "" "" ${pin_lbl}_bad
-  IntCmp $2 22621 ${pin_lbl}_bad "" ${pin_lbl}_bad
+
+  ; If the build number is less than 22621, jump to pinning; if greater than, no pinning
+  IntCmp $2 22621 "" ${pin_lbl}_good ${pin_lbl}_bad
+
+  ; Only if the version is 10.0.22621 do we fall through to here
+  ; If the UBR is greater than or equal to 2361, jump to no pinning
+  IntCmp $3 2361 ${pin_lbl}_bad "" ${pin_lbl}_bad
+
+  ${pin_lbl}_good:
 
   StrCpy ${outvar} '1'
 
   ${pin_lbl}_bad:
   !undef pin_lbl
 
+  Pop $3
   Pop $2
   Pop $1
   Pop $0