Prevent scroll-down contrast BG from overlapping in Firefox
Prevent scroll-down contrast BG from overlapping in Firefox

Closes #110

rkalis/roscasper,makerdiary/Casper,duyetdev/islab-theme,adelq/tufte-ghost,zestyzesty/Casper,spencercree/customGhost,DanPurdy/Spooky,abr4xas/Casper2Pelican,motatoes/casper-moe,SiliCAT/Casper,panezhang/Casper,cobbspur/Rasper,Soares/mindingourway.theme,sawilde/Casper,dbulli/Duppy,wolfstonecraft/wolfstonecraft.github.io,codio/Casper,netputer/Casper,danmindru/Casper,BookingSync/SmilingCasper,Normegil/Casper,novaugust/Novasper,PDXIII/Casper-FormMailer,abr4xas/Casper2Pelican,notno/Casper,Aplopio/ghost-theme,benbrandt/Casper-Ben,naggie/Casper,lukaszklis/spooky,yshrsmz/Casper_yslibrary,sealake/Ghostly,kaychaks/casper,Arasthel/Ghostly,ticoombs/SeoBro,bisurance/bisurance-ghost-casper,thormagnusson/casper,alvareztech/Casper,derdela/Casper,aholmes/Casper,topaxi/TopaxiCodes,bsansouci/Casper,forfuturellc/Casper,thormagnusson/casper,faizmokhtar/Fatso,faizmokhtar/Fatso,khsing/Haze,Gasol/Casper,fastefoundation/Frog,martinnormark/Casper,gchan/Casper,ticoombs/SeoBro,sealake/Ghostly,Teamtailor/Casper,notno/Casper,hnarayanan/narayanan.co-casper,roikiermedia/Casper-modified,matitalatina/Casper,TryGhost/Casper,yuchien302/YuChienGhostTheme,tandrewnichols/casper-dev,trunk-studio/Casper,jedidja/Casper,1cookco/Casper,JulienBrks/Casper,lumir-mrkva/chytra-ucetni-theme,jbfriedrich/lazo,zanui/Casper,Inchdev/blog-theme,dlew/Casper,allenan/mcs,jtrussell/Jasper,teambition/Casper,vertigra/Ghostly,btaratutin/Magenta,yshrsmz/Casper_yslibrary,tenoku/boo,yo1dog/Casper,yaeda/Arizona,ErisDS/Casper,AWCN/PrismCasper,trunk-studio/Casper,haakoo/Findlay,brnz/hboiled,sawilde/Casper,jrummell/CasperJR,kaiqigong/Casper,matitalatina/Casper,moehabib/casper-moe,wolfstonecraft/wolfstonecraft.github.io,dzimchuk/Casper,adelq/Casper,cwonrails/cwoncasper,emmmile/Casper,tandrewnichols/dullahan,tandrewnichols/casper-dev,wolfstonecraft/wolfstonecraft.github.io,dlecina/StayPuft,Elethom/Casper,martinnormark/Casper,eidolem/casper,Aaron1992/ak48,panezhang/Casper,haakoo/Findlay,derherrg/Orion,jacksoncwwong/Casper,rizowski/Theme,MoriTanosuke/kopis-ghost-theme,Mr-Zer0/yansnote,rkalis/roscasper,Zokormazo/Casper-eu,iT2afL0rd/Desper,ITJesse/Casper-zh,ivanoats/casper,Samisdat/ghost-conway,blt/Casper,michaelperrin/mike-ghost-theme,mbillard/Casper,dlecina/StayPuft,tiagojsalmeida/Kibosh-Ghost-Theme,novaugust/Novasper,fastefoundation/Frog,lumir-mrkva/chytra-ucetni-theme,bnggge/Casper,paulcbetts/Casper,kaiqigong/Casper,carlosbaraza/devmind-ghost-theme,realityone/RCasper,velimir0xff/Casper,hiroqli/Casper,dbulli/Duppy,eidolem/casper,ITJesse/Casper-zh,DevL/Casper,AaronLenoir/Casper,JDevlieghere/JCasper,michaelperrin/mike-ghost-theme,Zokormazo/Casper-eu,tiagocasanovapt/Casper,tiagocasanovapt/Casper,yo1dog/Casper,ghostchina/Casper-zh,therecluse26/Establishment,blade254353074/casper-custom,russmckendrick/Casper,Inchdev/blog-theme,malcolmocean/themindsui.theme,rizowski/Theme,danmindru/Casper,AaronLenoir/Casper,novaugust/Novasper,developer-prosenjit/Casper,BookingSync/SmilingCasper,Flink/Casper,teambition/Casper,blade254353074/casper-custom,vertigra/Ghostly,Gasol/Casper,jaydez/Casper2,PDXIII/Casper-FormMailer,Samisdat/ghost-conway,haakoo/Findlay,Acidburn0zzz/Casper,mnitchie/Casper,diancloud/Casper,tylergibson/Tynker,steinwaywhw/ghost-theme,jaydez/Casper2,AWCN/PrismCasper,sshockwave/VSCodeTheme,BrandwatchLtd/Casper,bnggge/Casper,bttf/Casper,ImKcat/ImKcatCasper,eduardochiaro/Casper-Light,DrZhi/Casper,eduardochiaro/Casper-Light,RuiAAPeres/Casper,lizequn/CasperByZzz,ryexley/Casper,naggie/Casper,lizequn/CasperByZzz,johanderohan/Casper,therecluse26/Establishment,diogomonica/Casper,Soares/mindingourway.theme,realityone/RCasper,benbrandt/Casper-Ben,forfuturellc/Casper,Mr-Zer0/yansnote,Kdecherf/Nicholas,Gimpneek/Casper2Pelican,diogomonica/Casper,DevL/Casper,tmack8001/skeletor-casper,fredeerock/atlab-ghost-theme,bsansouci/Casper,ghostchina/Casper-zh,Arasthel/Ghostly,cwonrails/cwoncasper,solobat/KCoder,KlausTrainer/Casper,evitolins/CasperEV,HiveHQ/Hive-Casper,Robdel12/Casper,alexshenoy/CasperModified,tenoku/boo,tiagojsalmeida/Kibosh-Ghost-Theme,devillex/phantasm,oddui/casper_littlehorse,Ramshackle-Jamathon/Casper,makerdiary/Casper,makapen/Casper,jedidja/Casper,SiliCAT/Casper,jasperla/ghost-Jasper,Ramshackle-Jamathon/Casper,Larleyt/Casper,cmwinters/lynx-theme,dzimchuk/Casper,tomkwok/Casper,sshockwave/VSCodeTheme,jasperla/ghost-Jasper,brnz/hboiled,hnarayanan/narayanan.co-casper,krames/bbq-theme,Rystakei/topdollar-theme,jrummell/CasperJR,khsing/Haze,bisurance/bisurance-ghost-casper,kdelfour/kd.eu-theme,mnitchie/Casper,hiroqli/Casper,spencercree/customGhost,topaxi/TopaxiCodes,Teamtailor/Casper,chin8628/Casper,derdela/Casper,KlausTrainer/Casper,oddui/casper_littlehorse,Flink/Casper,Elethom/Casper,tandrewnichols/dullahan,fredeerock/atlab-ghost-theme,Gimpneek/Casper2Pelican,cjfuller/Casper,1cookco/Casper,kaizvn/kMod-Casper,emmmile/Casper,tmack8001/skeletor-casper,johanderohan/Casper,Aplopio/ghost-theme,kaizvn/kMod-Casper,jbfriedrich/lazo,duyetdev/islab-theme,HiveHQ/Hive-Casper,ErisDS/Casper,Rystakei/topdollar-theme,emmmile/Casper,lukevers/Casper,alvareztech/Casper,JDevlieghere/JCasper,evitolins/CasperEV,brnz/hboiled,kdelfour/kd.eu-theme