URxvt.perl-ext-common: default,clipboard,url-select,keyboard-select
URxvt.perl-ext: bidi
URxvt.bidi.enabled: 1
-URxvt.url-select.launcher: firefox
+URxvt.url-select.launcher: firefox-nightly
URxvt.url-select.underline: true
URxvt.keysym.M-u: perl:url-select:select_next
URxvt.keysym.M-Escape: perl:keyboard-select:activate