这是一个firefox的扩展，功能是右击图片一键下载，省去了每次另存为然后选择路径的麻烦。

供初学者参考。本人原创。-This is a firefox extension function is a key right-click the image to download, eliminating the need for each time the Save As and then choose the path of trouble. This is the xpi file format is a Firefox extension, in fact, zip, unzip to change the name suffix can see the code. For advanced users. I am original.