diff --git a/gnu/packages/patches/icecat-CVE-2014-1593.patch b/gnu/packages/patches/icecat-CVE-2014-1593.patch
deleted file mode 100644
index 446920a95f..0000000000
--- a/gnu/packages/patches/icecat-CVE-2014-1593.patch
+++ /dev/null
@@ -1,154 +0,0 @@
-commit a58cea744ac5b93b99a66554e1029b2c7aa3255d
-Author: Matthew Gregan <kinetik@flim.org>
-Date:   Tue Nov 11 08:58:52 2014 +1300
-
-    Bug 1085175. r=roc, a=dveditz
-
-	Modified   content/media/MediaCache.cpp
-diff --git a/content/media/MediaCache.cpp b/content/media/MediaCache.cpp
-index 598d905..c99f724 100644
---- a/content/media/MediaCache.cpp
-+++ b/content/media/MediaCache.cpp
-@@ -1174,6 +1174,7 @@ MediaCache::Update()
-       // Figure out where we should be reading from. It's the first
-       // uncached byte after the current mStreamOffset.
-       int64_t dataOffset = stream->GetCachedDataEndInternal(stream->mStreamOffset);
-+      MOZ_ASSERT(dataOffset >= 0);
- 
-       // Compute where we'd actually seek to to read at readOffset
-       int64_t desiredOffset = dataOffset;
-@@ -1702,6 +1703,7 @@ MediaCacheStream::NotifyDataStarted(int64_t aOffset)
-   ReentrantMonitorAutoEnter mon(gMediaCache->GetReentrantMonitor());
-   NS_WARN_IF_FALSE(aOffset == mChannelOffset,
-                    "Server is giving us unexpected offset");
-+  MOZ_ASSERT(aOffset >= 0);
-   mChannelOffset = aOffset;
-   if (mStreamLength >= 0) {
-     // If we started reading at a certain offset, then for sure
-@@ -2118,23 +2120,28 @@ MediaCacheStream::Seek(int32_t aWhence, int64_t aOffset)
-     return NS_ERROR_FAILURE;
- 
-   int64_t oldOffset = mStreamOffset;
-+  int64_t newOffset = mStreamOffset;
-   switch (aWhence) {
-   case PR_SEEK_END:
-     if (mStreamLength < 0)
-       return NS_ERROR_FAILURE;
--    mStreamOffset = mStreamLength + aOffset;
-+    newOffset = mStreamLength + aOffset;
-     break;
-   case PR_SEEK_CUR:
--    mStreamOffset += aOffset;
-+    newOffset += aOffset;
-     break;
-   case PR_SEEK_SET:
--    mStreamOffset = aOffset;
-+    newOffset = aOffset;
-     break;
-   default:
-     NS_ERROR("Unknown whence");
-     return NS_ERROR_FAILURE;
-   }
- 
-+  if (newOffset < 0)
-+    return NS_ERROR_FAILURE;
-+  mStreamOffset = newOffset;
-+
-   CACHE_LOG(PR_LOG_DEBUG, ("Stream %p Seek to %lld", this, (long long)mStreamOffset));
-   gMediaCache->NoteSeek(this, oldOffset);
- 
-@@ -2176,11 +2183,10 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
-         break;
-       }
-       size = std::min(size, bytesRemaining);
--      // Clamp size until 64-bit file size issues (bug 500784) are fixed.
-+      // Clamp size until 64-bit file size issues are fixed.
-       size = std::min(size, int64_t(INT32_MAX));
-     }
- 
--    int32_t bytes;
-     int32_t cacheBlock = streamBlock < mBlocks.Length() ? mBlocks[streamBlock] : -1;
-     if (cacheBlock < 0) {
-       // We don't have a complete cached block here.
-@@ -2208,7 +2214,10 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
-         // We can just use the data in mPartialBlockBuffer. In fact we should
-         // use it rather than waiting for the block to fill and land in
-         // the cache.
--        bytes = std::min<int64_t>(size, streamWithPartialBlock->mChannelOffset - mStreamOffset);
-+        int64_t bytes = std::min<int64_t>(size, streamWithPartialBlock->mChannelOffset - mStreamOffset);
-+        // Clamp bytes until 64-bit file size issues are fixed.
-+        bytes = std::min(bytes, int64_t(INT32_MAX));
-+        NS_ABORT_IF_FALSE(bytes >= 0 && bytes <= aCount, "Bytes out of range.");
-         memcpy(aBuffer,
-           reinterpret_cast<char*>(streamWithPartialBlock->mPartialBlockBuffer.get()) + offsetInStreamBlock, bytes);
-         if (mCurrentMode == MODE_METADATA) {
-@@ -2232,6 +2241,7 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
-     gMediaCache->NoteBlockUsage(this, cacheBlock, mCurrentMode, TimeStamp::Now());
- 
-     int64_t offset = cacheBlock*BLOCK_SIZE + offsetInStreamBlock;
-+    int32_t bytes;
-     NS_ABORT_IF_FALSE(size >= 0 && size <= INT32_MAX, "Size out of range.");
-     nsresult rv = gMediaCache->ReadCacheFile(offset, aBuffer + count, int32_t(size), &bytes);
-     if (NS_FAILED(rv)) {
-@@ -2268,9 +2278,7 @@ MediaCacheStream::ReadAt(int64_t aOffset, char* aBuffer,
- }
- 
- nsresult
--MediaCacheStream::ReadFromCache(char* aBuffer,
--                                  int64_t aOffset,
--                                  int64_t aCount)
-+MediaCacheStream::ReadFromCache(char* aBuffer, int64_t aOffset, int64_t aCount)
- {
-   ReentrantMonitorAutoEnter mon(gMediaCache->GetReentrantMonitor());
-   if (mClosed)
-@@ -2292,7 +2300,7 @@ MediaCacheStream::ReadFromCache(char* aBuffer,
-         return NS_ERROR_FAILURE;
-       }
-       size = std::min(size, bytesRemaining);
--      // Clamp size until 64-bit file size issues (bug 500784) are fixed.
-+      // Clamp size until 64-bit file size issues are fixed.
-       size = std::min(size, int64_t(INT32_MAX));
-     }
- 
-@@ -2303,7 +2311,10 @@ MediaCacheStream::ReadFromCache(char* aBuffer,
-       // We can just use the data in mPartialBlockBuffer. In fact we should
-       // use it rather than waiting for the block to fill and land in
-       // the cache.
--      bytes = std::min<int64_t>(size, mChannelOffset - streamOffset);
-+      // Clamp bytes until 64-bit file size issues are fixed.
-+      int64_t toCopy = std::min<int64_t>(size, mChannelOffset - streamOffset);
-+      bytes = std::min(toCopy, int64_t(INT32_MAX));
-+      NS_ABORT_IF_FALSE(bytes >= 0 && bytes <= toCopy, "Bytes out of range.");
-       memcpy(aBuffer + count,
-         reinterpret_cast<char*>(mPartialBlockBuffer.get()) + offsetInStreamBlock, bytes);
-     } else {
-	Modified   media/libnestegg/include/nestegg-stdint.h
-diff --git a/media/libnestegg/include/nestegg-stdint.h b/media/libnestegg/include/nestegg-stdint.h
-index 599a7a5..c315991 100644
---- a/media/libnestegg/include/nestegg-stdint.h
-+++ b/media/libnestegg/include/nestegg-stdint.h
-@@ -1,6 +1,9 @@
- #ifdef _WIN32
- typedef __int64 int64_t;
- typedef unsigned __int64 uint64_t;
-+#if !defined(INT64_MAX)
-+#define INT64_MAX 9223372036854775807LL
-+#endif
- #else
- #include <stdint.h>
- #endif
-	Modified   media/libnestegg/src/nestegg.c
-diff --git a/media/libnestegg/src/nestegg.c b/media/libnestegg/src/nestegg.c
-index 8813cf2..56884d7 100644
---- a/media/libnestegg/src/nestegg.c
-+++ b/media/libnestegg/src/nestegg.c
-@@ -1950,6 +1950,9 @@ nestegg_offset_seek(nestegg * ctx, uint64_t offset)
- {
-   int r;
- 
-+  if (offset > INT64_MAX)
-+    return -1;
-+
-   /* Seek and set up parser state for segment-level element (Cluster). */
-   r = ne_io_seek(ctx->io, offset, NESTEGG_SEEK_SET);
-   if (r != 0)