Greasy Fork

Does not work on incomplete URL encoded redirection address
Examples
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http%3A//vimium.github.io/
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http%3A%2F/vimium.github.io/
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http%3A/%2Fvimium.github.io/
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http:%2F%2Fvimium.github.io/
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http:/%2Fvimium.github.io/
https://outgoing.mozilla.org/v1/5c2a5620285210f7267fdf87cfd39943f03f42538d2d98eec0b0cf5565dbca23/http:%2F/vimium.github.io/

Editing example
https://www.youtube.com/redirect?q=http%3A//github.com/gorhill/uBlock
https://www.youtube.com/redirect?q=http%3A%2F/github.com/gorhill/uBlock
https://www.youtube.com/redirect?q=http%3A/%2Fgithub.com/gorhill/uBlock
https://www.youtube.com/redirect?q=http:%2F%2Fgithub.com/gorhill/uBlock
https://www.youtube.com/redirect?q=http:/%2Fgithub.com/gorhill/uBlock
https://www.youtube.com/redirect?q=http:%2F/github.com/gorhill/uBlock

Are there any real sites that use such broken URLs?

This site will use %3A//
https://zhuanlan.zhihu.com/p/21280187

Try the new version.

Good update

...The original link of the new version seems to be unable to click

Fixed, thanks for testing.