Bug 1550248 - Sniff .m3u8 files as application/vnd.apple.mpegurl. r=jya

Depends on D85144

Differential Revision: https://phabricator.services.mozilla.com/D85286

netwerk/mime/nsMimeTypes.h

@@ -170,6 +170,7 @@
 #define VIDEO_AVI "video/avi"
 #define VIDEO_MATROSKA "video/x-matroska"
 #define APPLICATION_OGG "application/ogg"
+#define APPLICATION_MPEGURL "application/vnd.apple.mpegurl"
 
 /* x-uuencode-apple-single. QuickMail made me do this. */
 #define UUENCODE_APPLE_SINGLE "x-uuencode-apple-single"

toolkit/components/mediasniffer/nsMediaSniffer.cpp

@@ -38,7 +38,9 @@ nsMediaSnifferEntry nsMediaSniffer::sSnifferEntries[] = {
     // mp3 with ID3 tags, the string "ID3".
     PATTERN_ENTRY("\xFF\xFF\xFF", "ID3", AUDIO_MP3),
     // FLAC with standard header
-    PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "fLaC", AUDIO_FLAC)};
+    PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "fLaC", AUDIO_FLAC),
+    PATTERN_ENTRY("\xFF\xFF\xFF\xFF\xFF\xFF\xFF", "#EXTM3U",
+                  APPLICATION_MPEGURL)};
 
 // For a complete list of file types, see http://www.ftyps.com/index.html
 nsMediaSnifferEntry sFtypEntries[] = {