Bug 810137 - Device Storage filter out video formats that we do not support. r=padenot

toolkit/content/devicestorage.properties

@@ -1,4 +1,4 @@
 # Extensions we recognize for DeviceStorage storage areas
 pictures=*.jpe; *.jpg; *.jpeg; *.gif; *.png; *.bmp;
 music=*.mp3; *.ogg; *.m4a; *.m4b; *.m4p; *.m4v; *.m4r; *.3gp; *.mp4; *.aac; *.m3u; *.pls;
-videos=*.avi; *.divx; *.flv; *.m4v; *.mkv; *.mov; *.mp4; *.mpeg; *.mpg; *.ogm; *.ogv; *.ogx; *.rm; *.rmvb; *.smil; *.webm; *.wmv; *.xvid; *.3gp; *.ogg;
+videos=*.mp4; *.mpeg; *.mpg; *.ogv; *.ogx; *.webm; *.3gp; *.ogg;