From c36eb2f154a630524f5fd8256b220fb7770f9d17 Mon Sep 17 00:00:00 2001
From: Fedor <fedor@mail.ru>
Date: Sat, 4 May 2024 16:28:35 +0300
Subject: [PATCH] Remove mime restriction of plugins

---
 docshell/base/nsWebNavigationInfo.cpp |  6 ---
 dom/plugins/base/nsPluginHost.cpp     | 53 ---------------------------
 dom/plugins/base/nsPluginHost.h       |  6 ---
 3 files changed, 65 deletions(-)

diff --git a/docshell/base/nsWebNavigationInfo.cpp b/docshell/base/nsWebNavigationInfo.cpp
index a0da0db7ab..7c4ad7386a 100644
--- a/docshell/base/nsWebNavigationInfo.cpp
+++ b/docshell/base/nsWebNavigationInfo.cpp
@@ -51,12 +51,6 @@ nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
     return rv;
   }
 
-  // As of FF 52, we only support flash and test plugins, so if the mime types
-  // don't match for that, exit before we start loading plugins.
-  if (!nsPluginHost::CanUsePluginForMIMEType(aType)) {
-    return NS_OK;
-  }
-
   // If this request is for a docShell that isn't going to allow plugins,
   // there's no need to try and find a plugin to handle it.
   nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aWebNav));
diff --git a/dom/plugins/base/nsPluginHost.cpp b/dom/plugins/base/nsPluginHost.cpp
index f23761d28e..36747c3631 100644
--- a/dom/plugins/base/nsPluginHost.cpp
+++ b/dom/plugins/base/nsPluginHost.cpp
@@ -1153,12 +1153,6 @@ nsPluginTag* nsPluginHost::FindNativePluginForType(const nsACString& aMimeType,
     return nullptr;
   }
 
-  // As of FF 52, we only support flash and test plugins, so if the mime types
-  // don't match for that, exit before we start loading plugins.
-  if (!nsPluginHost::CanUsePluginForMIMEType(aMimeType)) {
-    return nullptr;
-  }
-
   LoadPlugins();
 
   nsTArray<nsPluginTag*> matchingPlugins;
@@ -1432,29 +1426,6 @@ nsresult nsPluginHost::EnumerateSiteData(const nsACString& domain,
   return NS_OK;
 }
 
-static bool MimeTypeIsAllowedForFakePlugin(const nsString& aMimeType) {
-  static const char* const allowedFakePlugins[] = {
-      // Flash
-      "application/x-shockwave-flash",
-      // PDF
-      "application/pdf",
-      "application/vnd.adobe.pdf",
-      "application/vnd.adobe.pdfxml",
-      "application/vnd.adobe.x-mars",
-      "application/vnd.adobe.xdp+xml",
-      "application/vnd.adobe.xfdf",
-      "application/vnd.adobe.xfd+xml",
-      "application/vnd.fdf",
-  };
-
-  for (const auto allowed : allowedFakePlugins) {
-    if (aMimeType.EqualsASCII(allowed)) {
-      return true;
-    }
-  }
-  return false;
-}
-
 NS_IMETHODIMP
 nsPluginHost::RegisterFakePlugin(JS::Handle<JS::Value> aInitDictionary,
                                  JSContext* aCx, nsIFakePluginTag** aResult) {
@@ -1463,12 +1434,6 @@ nsPluginHost::RegisterFakePlugin(JS::Handle<JS::Value> aInitDictionary,
     return NS_ERROR_FAILURE;
   }
 
-  for (const FakePluginMimeEntry& mimeEntry : initDictionary.mMimeEntries) {
-    if (!MimeTypeIsAllowedForFakePlugin(mimeEntry.mType)) {
-      return NS_ERROR_FAILURE;
-    }
-  }
-
   RefPtr<nsFakePluginTag> newTag;
   nsresult rv = nsFakePluginTag::Create(initDictionary, getter_AddRefs(newTag));
   NS_ENSURE_SUCCESS(rv, rv);
@@ -3683,24 +3648,6 @@ void nsPluginHost::DestroyRunningInstances(nsPluginTag* aPluginTag) {
   }
 }
 
-/* static */
-bool nsPluginHost::CanUsePluginForMIMEType(const nsACString& aMIMEType) {
-  // We only support flash as a plugin, so if the mime types don't match for
-  // those, exit before we start loading plugins.
-  //
-  // XXX: Remove test/java cases when bug 1351885 lands.
-  if (nsPluginHost::GetSpecialType(aMIMEType) ==
-          nsPluginHost::eSpecialType_Flash ||
-      MimeTypeIsAllowedForFakePlugin(NS_ConvertUTF8toUTF16(aMIMEType)) ||
-      aMIMEType.LowerCaseEqualsLiteral("application/x-test") ||
-      aMIMEType.LowerCaseEqualsLiteral("application/x-second-test") ||
-      aMIMEType.LowerCaseEqualsLiteral("application/x-third-test")) {
-    return true;
-  }
-
-  return false;
-}
-
 // Runnable that does an async destroy of a plugin.
 
 class nsPluginDestroyRunnable
diff --git a/dom/plugins/base/nsPluginHost.h b/dom/plugins/base/nsPluginHost.h
index f55c8c9786..731b542f54 100644
--- a/dom/plugins/base/nsPluginHost.h
+++ b/dom/plugins/base/nsPluginHost.h
@@ -179,12 +179,6 @@ class nsPluginHost final : public nsIPluginHost,
   // Always returns false if plugin.load_in_parent_process.<mime> is not set.
   static bool ShouldLoadTypeInParent(const nsACString& aMimeType);
 
-  /**
-   * Returns true if a plugin can be used to load the requested MIME type. Used
-   * for short circuiting before sending things to plugin code.
-   */
-  static bool CanUsePluginForMIMEType(const nsACString& aMIMEType);
-
   // checks whether aType is a type we recognize for potential special handling
   enum SpecialType {
     eSpecialType_None,