Bump supported Firefox to 4
Bump supported Firefox to 4

Range.getBoundingClientRect is not supported in FF 3.x

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r,antimatter15/CodeMirror,hackmdio/CodeMirror,philuchansky/CodeMirror,matthewbauer/CodeMirror,bluesh55/CodeMirror,nightwing/CodeMirror,agendor/CodeMirror,rustemferreira/CodeMirror,davidpham87/CodeMirror,anthonygego/CodeMirror,sourcelair/CodeMirror,nawroth/CodeMirror,codio/CodeMirror,tpphu/CodeMirror,d0liver/CodeMirror,karevn/CodeMirror,fmoliveira/CodeMirror,nightwing/CodeMirror,shiren/CodeMirror,bocharsky-bw/CodeMirror,rustemferreira/CodeMirror,ThebingServices/CodeMirror,ThebingServices/CodeMirror,ksanaforge/CodeMirror,wingify/CodeMirror,philuchansky/CodeMirror,elisee/CodeMirror,jpolitz/CodeMirror,ficristo/CodeMirror,notepadqq/CodeMirror,TechnicalPursuit/CodeMirror,AlanWasTaken/codemirror,belph/CodeMirror,webida/CodeMirror,buchslava/CodeMirror,hackmdio/CodeMirror,mizchi/CodeMirror,Allenice/CodeMirror,webida/CodeMirror,r7kamura/CodeMirror,d0liver/CodeMirror,Jisuanke/CodeMirror,ficristo/CodeMirror,GerHobbelt/CodeMirror2,thomasjm/CodeMirror,xeronith/CodeMirror,cintiamh/CodeMirror,camellhf/CodeMirror,Dominator008/CodeMirror,gkoberger/CodeMirror,pabloferz/CodeMirror,apatawari/CodeMirror,happibum/CodeMirror-main,AlanWasTaken/codemirror,Aliccer/CodeMirror,dperetti/CodeMirror,mtaran-google/CodeMirror,jayaprabhakar/CodeMirror,morrisonwudi/CodeMirror,happibum/CodeMirror-main,d0liver/CodeMirror,adobe/CodeMirror2,AlanWasTaken/codemirror,qiankun007/CodeMirror,buchslava/CodeMirror,Dominator008/CodeMirror,InternetGuru/CodeMirror,kuangyeheng/CodeMirror,ZombieHippie/CodeMirror,qiankun007/CodeMirror,tpphu/CodeMirror,antimatter15/CodeMirror,alur/CodeMirror,Icenium/CodeMirror,SidPresse/CodeMirror,dudb/CodeMirror,belph/CodeMirror,jkaplon/CodeMirror,manderson23/CodeMirror,thomasjm/CodeMirror,thomasjm/CodeMirror,ejgallego/CodeMirror,Allenice/CodeMirror,wbinnssmith/CodeMirror,schanzer/CodeMirror,matthewbauer/CodeMirror,namin/CodeMirror,michaelerobertsjr/CodeMirror,bocharsky-bw/CodeMirror,increpare/CodeMirror,flyskyko/CodeMirror,symbla/CodeMirror,pinbe/CodeMirror,ejgallego/CodeMirror,flyskyko/CodeMirror,elisee/CodeMirror,bgrins/CodeMirror,kerabromsmu/CodeMirror,kk9599/CodeMirror,kk9599/CodeMirror,systay/CodeMirror,Icenium/CodeMirror,joshterrell805-historic/CodeMirror,symbla/CodeMirror,kevinushey/CodeMirror,dbarnett/CodeMirror,apatawari/CodeMirror,mtaran-google/CodeMirror,loopspace/CodeMirror,namin/CodeMirror