Sfr s wb brwsr dvlpd by ppl. t s blt nt svrl f ppl's prtng systms, ncldng mcS, S, PdS nd vsnS, nd ss ppl's pn-src brwsr ngn WbKt, whch ws drvd frm KHTML.
Sfr ws ntrdcd n Mc S X Pnthr n Jnry 2003. t hs bn ncldd wth th Phn snc th frst-gnrtn Phn n 2007. t tht tm, Sfr ws th fstst brwsr n th Mc. Btwn 2007 nd 2012, ppl mntnd Wndws vrsn, bt bndnd t d t lw mrkt shr. n 2010, Sfr 5 ntrdcd rdr md, xtnsns, nd dvlpr tls. Sfr 11, rlsd n 2017, ddd ntllgnt Trckng Prvntn, whch ss rtfcl ntllgnc t blck wb trckng. Sfr 13 ddd spprt fr ppl Py, nd thntctn wth FD2 scrty kys. ts ntrfc ws rdsgnd n Sfr 15.