Edge has a larger market share (4%-7% depending on who you ask)
Firefox has (2%-6%, similar issue). Firefox mostly scores well among Wikimedia users and tracking. (High as 15% recently) Firefox barely even registers with Mobile users (0.5%-1.5%).
And. They both pale in comparison to Chrome (56%-69%) and Safari (14%-24%) in terms of user base / market share. People can argue and rant about Firefox doing something, yet they're arguing about 2%-6% of the WWW users currently.
https://en.wikipedia.org/wiki/Usage_share_of_web_browsers
https://radar.cloudflare.com/reports/browser-market-share-20...
https://www.w3counter.com/globalstats.php
https://kinsta.com/browser-market-share/
https://gs.statcounter.com/browser-market-share
https://www.statista.com/statistics/545520/market-share-of-i...