Your bug report

#56464: browse-url.el supports both Firefox *and* Mozilla?

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 56464@debbugs.gnu.org.

-- 
56464: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56464
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