Underpass App Company
Jeff Johnson
Underpass App Company is a sole proprietorship founded in 2016 by Jeff Johnson, whose 15 minutes of fame was for solving the Mac OCSP appocalypse. Before starting his own company, Jeff was a longtime software engineer at Rogue Amoeba Software and also worked on the open source RSS reader Vienna.
Company News Blog
StopTheMadness Pro
Take back your web browser
Mac App Icon
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ChangeTheHeaders
Customize HTTP request headers
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StopTheScript
Stop all the JavaScript!
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Link Unshortener
Reveal the real URL
Mac App Icon
Mac App Store Badge
StopTheFonts
Block web fonts in Safari
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Homecoming
for Mastodon
Open Mastodon URLs
in your own instance
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Jeff's free open source utilities:

StopTheMacAppStore
Stop Safari from opening the App Store app

StartTheZoom
Open http and https URLs in the Zoom app

PrivateWindow
Open URLs in a Safari private window