Cannot install unsigned extension

Number:rdar://29864379 Date Originated:2017-01-04
Status:Open Resolved:
Product:Safari Product Version:Safari 10.0.2 (12602.
Classification: Reproducible:
I was attempting to install an unsigned extension from outside the gallery. The extension is attached, but is also avialable here:

As expected, I was asked whether or not I should trust this extension. Every time I clicked "Trust", my input was ignored, as though I was hitting Cancel.

I eventually solved the problem by stumbling upon this thread:

By clicking the button via keyboard, and not mouse, I was able to get the extension trusted.


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