At the moment, when you add an image using a link that does not contain a name and extension at the end, you get the error "Only files with the following extensions are allowed: {list}".
Install the patch with the widget from task
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Provide field widget
Needs review
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Add an image type field to the content type.
In the form mode settings for the image field, select the Remote file URL formatter.
Create a new content with the link https://secure.syndetics.com/index.aspx?isbn=9780061148811/MC.GIF&type=x... for the image field.
Click the save button.
Get an error.
Add a process to generate a file name.
Active
2.0
Code