Images On/Off extension has been updated.
There is one notable new feature in this version: a user asked for different icon that will better fit his black browser theme, so we added such an option. You can now change the toolbar icon to lighter or darker one. To do this just go to extension's settings page and select the icon you like.
To access the options page:
1) Right-click on the extension's icon and select "Options":
2) And select the icon from the list: