Steps to add a note to a extracted and cropped image -
- Install the add-on and restart Firefox
- Right click on the page to view context menu. From the FireShot option select Capture visible area and... and then choose Edit.
- The entire page opens in a new FireShot window.
- Select the desired portion of the image and click on the Crop button on the right toolbar.
- Select the Text tool in the top toolbar and click on the image where you want to write the note