Just remember to copy and paste the "image URL" in the photo tab.
Or quick key is hold down CONTROL 'C' to copy and CONTROL 'V' to paste
So ok the image above you would right click your mouse.
Then highlight 'Copy Image URL' then left click to Copy....then in your edit post area click on the tab that looks like a mountain and sun photo, click on it.
Then PASTE CONTROL 'V'