I loved this add-on, sadly with the new FF update is not working any more. I really hope this issue to be fixed quickly.

English Only.

It is not working properly. After changing the size of the image you are looking for, it also changes diacritical characters such as "Ńłózż" to replacement characters from the English-language alphabet.
For exapmle: "złotej" replace to "zĂ Â otej "