display an error message when :dialog dominspector is called if the DOM Inspector extension is not installed
display an error message when :dialog dominspector is called if the DOM
Inspector extension is not installed

moonshadow/dactyl,airodactyl/airodactyl,madand/pentadactyl-pm,moonshadow/dactyl,paretje/vimperator-labs,Kjwon15/dactyl,Kjwon15/dactyl,airodactyl/dactyl,Evidlo/vimperator-labs,invl/dactyl,madand/pentadactyl-pm,nathyong/dactyl,invl/dactyl,Kjwon15/dactyl,invl/dactyl,nathyong/dactyl,seanmorton/vimperator-labs,nathyong/dactyl,Sheile/vimperator-labs,derenio/vimperator-labs,Quicksaver/vimperator-labs,airodactyl/dactyl,Kjwon15/dactyl,5digits/dactyl,moonshadow/dactyl,airodactyl/dactyl,Sheile/vimperator-labs,airodactyl/dactyl,stemar94/vimperator-labs,moonshadow/dactyl,nathyong/dactyl,invl/dactyl,5digits/dactyl,seanmorton/vimperator-labs,nullren/vimperator-labs,nullren/vimperator-labs,zklinger/vimperator-labs,Evidlo/vimperator-labs,moonshadow/dactyl,mcarton/vimperator-labs,derenio/vimperator-labs,5digits/dactyl,airodactyl/airodactyl,stemar94/vimperator-labs,nathyong/dactyl,5digits/dactyl,nathyong/dactyl,madand/pentadactyl-pm,moonshadow/dactyl,Kjwon15/dactyl,Kjwon15/dactyl,airodactyl/dactyl,madand/pentadactyl-pm,invl/dactyl,Quicksaver/vimperator-labs,madand/pentadactyl-pm,zklinger/vimperator-labs,airodactyl/dactyl,madand/pentadactyl-pm,5digits/dactyl,mcarton/vimperator-labs,invl/dactyl,paretje/vimperator-labs,5digits/dactyl