diff --git a/toolkit/themes/linux/mozapps/extensions/category-experiments.png b/toolkit/themes/linux/mozapps/extensions/category-experiments.png deleted file mode 100644 index a9d00545ef..0000000000 Binary files a/toolkit/themes/linux/mozapps/extensions/category-experiments.png and /dev/null differ diff --git a/toolkit/themes/osx/mozapps/extensions/category-experiments.png b/toolkit/themes/osx/mozapps/extensions/category-experiments.png deleted file mode 100644 index a9d00545ef..0000000000 Binary files a/toolkit/themes/osx/mozapps/extensions/category-experiments.png and /dev/null differ