diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
index 5f6d3ce596d..9fd5d033409 100644
--- a/netwerk/protocol/http/nsHttpChannel.cpp
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -2958,7 +2958,7 @@ nsHttpChannel::OpenCacheEntry(bool isHttps)
     uint32_t cacheEntryOpenFlags;
     bool offline = gIOService->IsOffline() || appOffline;
     if (offline || (mLoadFlags & INHIBIT_CACHING)) {
-        if (BYPASS_LOCAL_CACHE(mLoadFlags) && !offline) {
+        if (BYPASS_LOCAL_CACHE(mLoadFlags) && !offline && !PossiblyIntercepted()) {
             goto bypassCacheEntryOpen;
         }
         cacheEntryOpenFlags = nsICacheStorage::OPEN_READONLY;