Where Adblock+ injects 20K CSS rules, HTTPSB injects one

In plain words

HTTP Switchboard is a browser extension that lets users block or allow specific types of web requests like scripts, iframes, ads, and tracking services through a point-and-click interface. It targets users who want granular control over what their browser loads. The tool distinguishes itself by using a more efficient approach than competitors, injecting only necessary CSS rules into pages rather than applying thousands of generic rules to every site.

written from the facts on this page · September 2026

From the sources

Summary: Where Adblock Plus ("ABP") indiscriminately injects over 13,000 generic CSS rules into every page and frames, HTTP Switchboard ("HTTPSB") injects only a handful generic CSS rules at most. HTTPSB's approach is to perform a quick web page survey in order to dramatically narrow down the generic CSS selectors which need to be injected in web pages and frames. Examples: on wired.com ABP injects over 13,000 generic CSS selectors while HTTPSB injects only 8 generic CSS selectors ; and on a page with no ads, ABP still injects over 13,000 generic CSS selectors while HTTPSB injects none . Many people have asked me to support ABP element hiding filters (I prefer to refer to these as "cosmetic…from github.com

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