http://www.perlmonks.org?node_id=872781

In firefox, organize bookmarks (ctrl+shift+b), import html, it will create a bookmark folder called pm
<!DOCTYPE NETSCAPE-Bookmark-file-1> <DL><p> <DT><H3 ADD_DATE="1290235287" LAST_MODIFIED="1290237558">pm</H3> <DL><p> <DT><A HREF="javascript:(function(){function%20addScript(src){var% +20s=document.createElement('script');%20s.setAttribute('src',src);%20 +document.getElementsByTagName('body')[0].appendChild(s);%20}addScript +('http://code.jquery.com/jquery-latest.js');addScript(%22http://jquer +y-json.googlecode.com/files/jquery.json-2.2.min.js%22);jQuery.fn.oute +rHTML%20=%20function()%20{%20return%20$('<div>').append(%20this.eq(0) +.clone()%20).html();%20};jQuery.fn.extend({%20html2string:%20function +()%20{%20return%20$('<div>').append(this.clone()).remove().html();%20 +}%20});})()" ADD_DATE="1270068277" LAST_MODIFIED="1290229496">add jQu +ery to page</A> <DT><A HREF="javascript:(function(){ jQuery.fn.outerHTML=functi +on(){return $('<div>').append(this.eq(0).clone()).html();};jQuery.fn. +extend({html2string:function(){return $('<div>').append(this.clone()) +.remove().html();}}); alert( $('link[rel~=stylesheet]').html2string( +) ); })()" ADD_DATE="1270068277" LAST_MODIFIED="1290229496">alert +link/css</A> <DT><H3 ADD_DATE="1290235287" LAST_MODIFIED="1290237558">set t +heme</H3> <DL><p> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=20496 +2%22%20untitle=%22Blue%20Web-Safe%20theme%22%20type=%22text/css%22>') +;%20%20%20%20})()" ADD_DATE="1290235369" LAST_MODIFIED="1290235381">B +lue Web-Safe theme</A> <HR> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=2877% +22%20untitle=%22Red%20theme%22%20type=%22text/css%22>');%20%20%20%20} +)()" ADD_DATE="1290235401" LAST_MODIFIED="1290235406">Red theme</A> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=6181% +22%20untitle=%22JBlue%20theme%22%20type=%22text/css%22>');%20%20%20%2 +0})()" ADD_DATE="1290235382" LAST_MODIFIED="1290235391">JBlue theme</ +A> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=5103% +22%20untitle=%22Night%20Shift%20theme%22%20type=%22text/css%22>');%20 +%20%20%20})()" ADD_DATE="1290235352" LAST_MODIFIED="1290235366">Night + Shift theme</A> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=6182% +22%20untitle=%22Green%20Web-Safe%20theme%22%20type=%22text/css%22>'); +%20%20%20%20})()" ADD_DATE="1290235338" LAST_MODIFIED="1290235349">Gr +een Web-Safe theme</A> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=22726 +1%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22>');%20%20%20% +20})()" ADD_DATE="1290235330" LAST_MODIFIED="1290235335">Dark theme</ +A> <DT><A HREF="javascript:(function(){%20%20%20%20%20$('link +[rel~=stylesheet]').remove();%20$('head').append('<link%20rel=%22styl +esheet%22%20href=%22/css/common.css%22%20type=%22text/css%22>');%20$( +'head').append('<link%20rel=%22stylesheet%22%20href=%22?node_id=40426 +7%22%20untitle=%22Perl-blue%20theme%22%20type=%22text/css%22>');%20%2 +0%20%20})()" ADD_DATE="1290235313" LAST_MODIFIED="1290235320">Perl-bl +ue theme</A> <HR> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=227261%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22%3E'); +%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspar +t=1;displaytype=displaycode;node_id=145882;part=1%22%20untitle=%22mdi +llon%20Dark%20theme%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" + ADD_DATE="1290237738" LAST_MODIFIED="1290237738">145882 mdillon Dark + theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=227261%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22%3E'); +%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspar +t=1;displaytype=displaycode;node_id=156642;part=1%22%20untitle=%22Jue +rd%20Dark%20theme%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" A +DD_DATE="1290237738" LAST_MODIFIED="1290237738">156642 Juerd Dark the +me</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=227261%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22%3E'); +%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspar +t=1;displaytype=displaycode;node_id=163260;part=1%22%20untitle=%22jef +fa%20Dark%20theme%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" A +DD_DATE="1290237738" LAST_MODIFIED="1290237738">163260 jeffa Dark the +me</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=204962%22%20untitle=%22Blue%20Web-Safe%20theme%22%20type=%22text/c +ss%22%3E');%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href +=%22?abspart=1;displaytype=displaycode;node_id=167905;part=1%22%20unt +itle=%22Aristotle%20Blue%20Web-Safe%20theme%22%20type=%22text/css%22% +3E');%20%20%20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED="1290237 +738">167905 Aristotle Blue Web-Safe theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=204962%22%20untitle=%22Blue%20Web-Safe%20theme%22%20type=%22text/c +ss%22%3E');%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href +=%22?abspart=1;displaytype=displaycode;node_id=401810;part=1%22%20unt +itle=%22demerphq%20Blue%20Web-Safe%20theme%22%20type=%22text/css%22%3 +E');%20%20%20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED="12902377 +38">401810 demerphq Blue Web-Safe theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=2877%22%20untitle=%22Red%20theme%22%20type=%22text/css%22%3E');%20 +$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspart=1 +;displaytype=displaycode;node_id=177951;part=1%22%20untitle=%22greenF +ox%20Red%20theme%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" AD +D_DATE="1290237738" LAST_MODIFIED="1290237738">177951 greenFox Red th +eme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=204962%22%20untitle=%22Blue%20Web-Safe%20theme%22%20type=%22text/c +ss%22%3E');%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href +=%22?abspart=1;displaytype=displaycode;node_id=193955;part=1%22%20unt +itle=%22Django%20Blue%20Web-Safe%20theme%22%20type=%22text/css%22%3E' +);%20%20%20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED="1290237738 +">193955 Django Blue Web-Safe theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=6182%22%20untitle=%22Green%20Web-Safe%20theme%22%20type=%22text/cs +s%22%3E');%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href= +%22?abspart=1;displaytype=displaycode;node_id=206834;part=1%22%20unti +tle=%22samurai%20(khaki)%20Green%20Web-Safe%20theme%22%20type=%22text +/css%22%3E');%20%20%20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED= +"1290237738">206834 samurai (khaki) Green Web-Safe theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=227261%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22%3E'); +%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspar +t=1;displaytype=displaycode;node_id=278939;part=1%22%20untitle=%22Int +repid%20(N.Y.P.M.Blue)%20Dark%20theme%22%20type=%22text/css%22%3E');% +20%20%20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED="1290237738">2 +78939 Intrepid (N.Y.P.M.Blue) Dark theme</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspa +rt=1;displaytype=displaycode;node_id=310406;part=1%22%20untitle=%22Ro +y%20Johnson%20(parchment/brown)%22%20type=%22text/css%22%3E');%20%20% +20%20%7D)()" ADD_DATE="1290237738" LAST_MODIFIED="1290237738">310406 +Roy Johnson (parchment/brown)</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22/css/common.css%22%20type=%22text/css%22%3E') +;%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?node_ +id=227261%22%20untitle=%22Dark%20theme%22%20type=%22text/css%22%3E'); +%20$('head').append('%3Clink%20rel=%22stylesheet%22%20href=%22?abspar +t=1;displaytype=displaycode;node_id=872401;part=3%22%20untitle=%22kco +tt%20Dark%20theme%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" A +DD_DATE="1290237738" LAST_MODIFIED="1290237738">872401 kcott Dark the +me</A> <HR> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22?abspart=1;displaytype=displaycode;node_id=49 +8037;part=2%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" ADD_DAT +E="1290237738" LAST_MODIFIED="1290237738">498037 radiantmatrix Pumpki +n Theme!</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22?abspart=1;displaytype=displaycode;node_id=41 +1815;part=1%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" ADD_DAT +E="1290237738" LAST_MODIFIED="1290237738">411815 radiantmatrix A Soot +hing Green Theme I've been using</A> <DT><A HREF="javascript:(function()%7B%20%20%20%20%20$('li +nk[rel~=stylesheet]').remove();%20$('head').append('%3Clink%20rel=%22 +stylesheet%22%20href=%22?abspart=1;displaytype=displaycode;node_id=41 +1949;part=1%22%20type=%22text/css%22%3E');%20%20%20%20%7D)()" ADD_DAT +E="1290237738" LAST_MODIFIED="1290237738">411949 radiantmatrix Fun wi +th Aristotle's Perl-Blue theme</A> </DL><p> </DL> </DL>
To use first click "add jQuery to the page" then go and "set theme", and wait for the stylesheets to load.

Based on PerlMonks CSS HOWTO, PerlMonks CSS Examples, User CSS Repository.