Jack Kingsman

A regex engine to handle basic regular expressions on all viewed pages.

Quickly add disruptive unicode, naughty strings, and more to your clipboard.

Replace emoticons with emoji and other text replacement as you type -- now works on Facebook, WhatsApp, etc.

Produce gamma frequency pulses, possibly linked to neural amyloid reduction. DO NOT USE IF PHOTOSENSITIVE.

Add a link to Wikipedia at the top of the Google results page.