--- a/netwerk/protocol/about/nsAboutCache.cpp
+++ b/netwerk/protocol/about/nsAboutCache.cpp
@@ -488,23 +488,18 @@ nsAboutCache::Channel::OnCacheEntryInfo(
         mBuffer.AppendLiteral("No last modified time");
     }
     mBuffer.AppendLiteral("</td>\n");
 
     // Expires time
     mBuffer.AppendLiteral("    <td>");
 
     // Bug - 633747.
-    // It says in the bug that the odd expiration time is: 1970-01-01 01:00:00
-    // However, that time is in local time(Africa in the bug).
-    // variable 'mExpirationTime' gets the conversion:
-    // 1970-01-01 01:00:00 --> 1970-01-01 00:00:00 GMT which is 0 in hex
-    // So, 0 represents the UNIX timestamp 1970-01-01 00:00:00 GMT.
-    // We just find out if the expiration time is equal
-    // to 0 and if so, we simply show "expired immediately"
+    // When expiration time is 0, we show 1970-01-01 01:00:00 which is confusing.
+    // So we check if time is 0, then we show a message, "Expired Immediately"
     if (aExpirationTime == 0) {
         mBuffer.AppendLiteral("Expired Immediately");
     } else if (aExpirationTime < 0xFFFFFFFF) {
         PrintTimeString(buf, sizeof(buf), aExpirationTime);
         mBuffer.Append(buf);
     } else {
         mBuffer.AppendLiteral("No expiration time");
     }

--- a/netwerk/protocol/about/nsAboutCacheEntry.cpp
+++ b/netwerk/protocol/about/nsAboutCacheEntry.cpp
@@ -424,23 +424,18 @@ nsAboutCacheEntry::Channel::WriteCacheEn
     } else {
         APPEND_ROW("last modified", "No last modified time (bug 1000338)");
     }
 
     // Expiration Time
     entry->GetExpirationTime(&u);
 
     // Bug - 633747.
-    // It says in the bug that the odd expiration time is: 1970-01-01 01:00:00
-    // However, that time is in local time(Africa in the bug).
-    // variable 'u' gets the conversion:
-    // 1970-01-01 01:00:00 --> 1970-01-01 00:00:00 GMT which is 0 in hex
-    // So, 0 represents the UNIX timestamp 1970-01-01 00:00:00 GMT.
-    // We just find out if the expiration time is equal
-    // to 0 and if so, we simply show "expired immediately"
+    // When expiration time is 0, we show 1970-01-01 01:00:00 which is confusing.
+    // So we check if time is 0, then we show a message, "Expired Immediately"
     if (u == 0) {
         APPEND_ROW("expires", "Expired Immediately");
     } else if (u < 0xFFFFFFFF) {
         PrintTimeString(timeBuf, sizeof(timeBuf), u);
         APPEND_ROW("expires", timeBuf);
     } else {
         APPEND_ROW("expires", "No expiration time");
     }