Firefox is Toast Because It Got Toasted by Mozilla
In 2026 we already see Firefox at only 1.6% "market share" in the US. "A paragraph explaining the relevance of the low market share is missing," said a reader, linking to a blog post from the end of 2023, i.e. about 2 years ago:
A somewhat obscure guideline for developers of U.S. government websites may be about to accelerate the long, sad decline of Mozilla’s Firefox browser. There already are plenty of large entities, both public and private, whose websites lack proper support for Firefox; and that will get only worse in the near future, because the ’fox’s auburn paws are perilously close to the lip of the proverbial slippery slope.
The U.S. Web Design System (USWDS) provides a comprehensive set of standards which guide those who build the U.S. government’s many websites. Its documentation for developers borrows a “2% rule” from its British counterpart:
. . . we officially support any browser above 2% usage as observed by analytics.usa.gov.
At this writing, that analytics page shows the following browser traffic for the previous ninety days:
Browser Share Chrome 49% Safari 34.8% Edge 8.4% Firefox 2.2% Safari (in-app) 1.9% Samsung Internet 1.6% Android Webview 1% Other 1%
Firefox cannot keep above 2% and hasn't been able to for quite some time. So many users of this browser (or its derivatives) will receive a cold shoulder. █