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Hi, I would like to be able to create links to local files on my own computer. I tried to create a link using standard CTRL-K dialog and entering e.g. file:///home/zadam/hello.txt but I end up with:

This seems to be caused by strict validation of inserted links in ckeditor5-link/src/utils.js:ensureSafeUrl, specifically the SAFE_URL regex.

Perhaps there are other URI schemes which might be worth whitelisting - e.g. jabber, xmpp, magnet, sftp (different from already whitelisted ftps), skype, ssh, git, svn ...

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