Manual:$wgTiffThumbnailType/zh

细节
文件扩展名和MIME类型的数组，用于在发送TIFF 图像以在网页中内联显示时将其转换为. By default, this is false, meaning this conversion does not occur.

Browsers don't support TIFF inline generally, so images need to be converted to an alternate format. Note scaling should work with ImageMagick, but may not with GD scaling.