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-rw-r--r--modules/libpref/init/all.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 729512407..e1536933a 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -4392,7 +4392,7 @@ pref("image.decode-immediately.enabled", false);
pref("image.downscale-during-decode.enabled", true);
// The default Accept header sent for images loaded over HTTP(S)
-pref("image.http.accept", "*/*");
+pref("image.http.accept", "image/webp,image/png,image/*;q=0.8,*/*;q=0.5");
// The threshold for inferring that changes to an <img> element's |src|
// attribute by JavaScript represent an animation, in milliseconds. If the |src|