Here's what I'm referring to in the extension:
posted by x.15a2 Community Leader2 years and 16 days ago Link

I just gave this a test and it works for me, having the same effect as adding \ to the search. You just have to use the search box within the extension rather than the browser's search box.
posted by tagawa Staff2 years and 15 days ago Link
By the way, thanks for the reminder about the extension. I tweeted about it following your post so more people should discover it. And thanks to the OP for raising this!
posted by tagawa Staff2 years and 12 days ago Link
Could there be a !bang for I'm feeling ducky? Something like !ducky ?
posted by Choca 2 years and 11 days ago Link