I do not think it is doable with a GNOME shortcut because there does not seem
to be an option on the command line (I looked at 'man abrowser') to do that.
But I found a free software add-on that apparently does what you want:
https://addons.mozilla.org/en-US/firefox/addon/shortcutkey2url
- [Trisquel-users] Add own short cut in Abrowser or Icecat? jbahn
- [Trisquel-users] Re : Add own short cut in Abrowser or I... lcerf
- Re: [Trisquel-users] Add own short cut in Abrowser o... jbahn
- [Trisquel-users] Re : Add own short cut in Abrow... lcerf
- Re: [Trisquel-users] Add own short cut in Ab... jbahn
- [Trisquel-users] Re : Add own short cut... lcerf
- Re: [Trisquel-users] Add own short cut in Abrowser or Ic... sigdpsy
- Re: [Trisquel-users] Add own short cut in Abrowser or Ic... mo98
- Re: [Trisquel-users] Add own short cut in Abrowser or Ic... jbahn