This update for MozillaFirefox fixes the following issues:
Firefox Extended Support Release 68.8.0 ESR MFSA 2020-17 (bsc#1171186)
Since firefox-gcc8 now has disabled autoreqprov for firefox-libstdc++6 and firefox-libgcc_s1, those packages don't provide some capabilities, we have to disable AutoReqProv in MozillaFirefox too so they're not added as automatic requirements. (bsc#1162828)