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.

chrome
chrome.manifest
......\quickdown.jar
defaults
........\preferences
........\...........\defaults.js
install.rdf

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