Bug 455086 - Set up windows file associations for .SVG. r=mhowell

MANUAL PUSH: This is mhowell manually combining a new contributor's patch stack.

Differential Revision: https://phabricator.services.mozilla.com//D41477

--HG--
extra : source : 7219965f391ab9b548ea0e9305ef5acafd2640d5
extra : amend_source : 9a7c03a5e8a7c6a2ec7ca005cda08336846ec977

browser/installer/windows/nsis/shared.nsh

@@ -450,6 +450,7 @@
   ${AddAssociationIfNoneExist} ".ogv" "FirefoxHTML$5"
   ${AddAssociationIfNoneExist} ".pdf" "FirefoxHTML$5"
   ${AddAssociationIfNoneExist} ".webm" "FirefoxHTML$5"
+  ${AddAssociationIfNoneExist} ".svg" "FirefoxHTML$5"
 
   ; An empty string is used for the 5th param because FirefoxHTML is not a
   ; protocol handler
@@ -533,6 +534,7 @@
   WriteRegStr ${RegKey} "$0\Capabilities\FileAssociations" ".shtml" "FirefoxHTML$2"
   WriteRegStr ${RegKey} "$0\Capabilities\FileAssociations" ".xht"   "FirefoxHTML$2"
   WriteRegStr ${RegKey} "$0\Capabilities\FileAssociations" ".xhtml" "FirefoxHTML$2"
+  WriteRegStr ${RegKey} "$0\Capabilities\FileAssociations" ".svg" "FirefoxHTML$2"
 
   WriteRegStr ${RegKey} "$0\Capabilities\StartMenu" "StartMenuInternet" "$1"
 

browser/installer/windows/nsis/uninstaller.nsi

@@ -331,6 +331,7 @@ Section "Uninstall"
   ${un.RegCleanFileHandler}  ".ogv"  "FirefoxHTML-$AppUserModelID"
   ${un.RegCleanFileHandler}  ".pdf"  "FirefoxHTML-$AppUserModelID"
   ${un.RegCleanFileHandler}  ".webm"  "FirefoxHTML-$AppUserModelID"
+  ${un.RegCleanFileHandler} ".svg" "FirefoxHTML-$AppUserModelID"
 
   SetShellVarContext all  ; Set SHCTX to HKLM
   ${un.GetSecondInstallPath} "Software\Mozilla" $R9