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Image files that employ JPG compression are commonly called "JPG files" and are stored in variants of the JIF image format. JPG typically achieves 10:1 compression with little perceptible loss in image quality. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPG is a commonly used method of lossy compression for digital images, particularly those produced by digital photography. Unfortunately, MAC images can only contain graphics in black-and-white. The files can still be opened and viewed by a few programs nowadays, despite being published in 1984. MAC files are raster images created by MacPaint, one of the first painting programs that have been developed for Macintosh computers. In a future release, I will try to offer a different approach that uses fewer privileges.Application/mac, application/x-mac, image/mac, image/x-mac, image/x-macpaint, image/x-quicktime I regret having to use the "All sites" permission, but most images these days load from a different server, and that creates a cross-site access problem (canvas taint) that often blocks the extension from saving unless it has permission in advance. The button bar may not appear and images may not be saved if scripts are blocked from running in the page (for example, by the NoScript extension). * Ctrl+click "Save webP as." to save in JPEG format at 92% quality (on Mac, use Command+click)Įxtensions can only save under your Downloads folder, but you can set up date or site folders to help keep organized. * Shift+click "Save webP as." to save in PNG format * Click "Save webP as." to show format/quality buttons overlaid on the image

These are the default actions, but you can switch them around to fit your needs (on the Options panel): If you want to discourage sites from sending webP format images at all, especially if you are having trouble saving GIFv files, check out my other extension: Don't "Accept" image/webp. There also is a button to re-request the image masquerading as Internet Explorer 11 (you might need to click it a second time because Firefox likes to serve the cached iamge), and a button to send animated WebP images to for conversion to animated GIFs. This extension allows converting from WebP (or any other format) to PNG or JPEG.