How Do I Resize Images by Default in Compose Window?

[killz]

When I click and drag images to the compose window, the images get too large. I then have to resize them to a smaller size. How can I get these images smaller by default when I drag them to the compose window?

[DanRaisch]

Maybe this extension -- https://addons.mozilla.org/en-US/thunde ... ize-image/