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HTTP/2 200
tt-server: t=1766813316678281 D=6118
last-modified: Sun, 30 Nov 2025 17:05:45 GMT
etag: "1372-644d2df9933a0"
accept-ranges: bytes
content-length: 4978
content-type: text/html
date: Sat, 27 Dec 2025 05:28:36 GMT
server: Apache
Underpass App Company
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.
| StopTheMadness Pro Take back your web browser |
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| StopTheScript Stop all the JavaScript! |
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| Link Unshortener Reveal the real URL |
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| 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
PrivateWindow
Open URLs in a Safari private window