G: sends the current page URL to Google to perform a reverse image search:
javascript:%20(function%20()%20%7Burl%20=%20location.href;location.href%20=%20'https://www.google.com/searchbyimage?&image_url='+url;%7D());R: cleans up links on a page (notably from Google) by removing redirect/tracking wrappers and restoring the direct URLs
javascript:(function(){var%20k,x,t,i,j,p;%20for(k=0;x=document.links[k];k++){t=x.href.replace(/[%]3A/ig,':').replace(/[%]2f/ig,'/');i=t.lastIndexOf('http');if(i>0){%20t=t.substring(i);%20j=t.indexOf('&');%20if(j>0)t=t.substring(0,j);%20p=/https?\:\/\/[^\s]*[^.,;'">\s\)\]]/.exec(unescape(t));%20if(p)%20x.href=p[0];%20}%20else%20if%20(x.onmouseover&&x.onmouseout){x.onmouseover();%20if%20(window.status%20&&%20window.status.indexOf('://')!=-1)x.href=window.status;%20x.onmouseout();%20}%20x.onmouseover=null;%20x.onmouseout=null;%20}})();H: hides all visited links by injecting a CSS rule that makes them invisible
javascript:(function(){var%20newSS,%20styles=':visited%20{display:%20none}';%20if(document.createStyleSheet)%20{%20document.createStyleSheet("javascript:'"+styles+"'");%20}%20else%20{%20newSS=document.createElement('link');%20newSS.rel='stylesheet';%20newSS.href='data:text/css,'+escape(styles);%20document.documentElement.childNodes[0].appendChild(newSS);%20}%20})();- : increment URL
javascript:(function(){%20var%20e,s;%20IB=1;%20function%20isDigit(c)%20{%20return%20("0"%20<=%20c%20&&%20c%20<=%20"9")%20}%20L%20=%20location.href;%20LL%20=%20L.length;%20for%20(e=LL-1;%20e>=0;%20--e)%20if%20(isDigit(L.charAt(e)))%20{%20for(s=e-1;%20s>=0;%20--s)%20if%20(!isDigit(L.charAt(s)))%20break;%20break;%20}%20++s;%20if%20(e<0)%20return;%20oldNum%20=%20L.substring(s,e+1);%20newNum%20=%20""%20+%20(parseInt(oldNum,10)%20+%20IB);%20while%20(newNum.length%20<%20oldNum.length)%20newNum%20=%20"0"%20+%20newNum;%20location.href%20=%20L.substring(0,s)%20+%20newNum%20+%20L.slice(e+1);%20})();- : decrement URL
javascript:(function(){%20var%20e,s;%20IB=-1;%20function%20isDigit(c)%20{%20return%20("0"%20<=%20c%20&&%20c%20<=%20"9")%20}%20L%20=%20location.href;%20LL%20=%20L.length;%20for%20(e=LL-1;%20e>=0;%20--e)%20if%20(isDigit(L.charAt(e)))%20{%20for(s=e-1;%20s>=0;%20--s)%20if%20(!isDigit(L.charAt(s)))%20break;%20break;%20}%20++s;%20if%20(e<0)%20return;%20oldNum%20=%20L.substring(s,e+1);%20newNum%20=%20""%20+%20(parseInt(oldNum,10)%20+%20IB);%20while%20(newNum.length%20<%20oldNum.length)%20newNum%20=%20"0"%20+%20newNum;%20location.href%20=%20L.substring(0,s)%20+%20newNum%20+%20L.slice(e+1);%20})();T@G : custom turlututu+hostname@gmail.com
javascript:(function()%7Bvar%20w%20%3D%20window.location.hostname.replace(%2F%5Ewww%5C.%2F%2C%20'')%3Bw%20%3D%20w.replace(%2F%5C..%7B2%2C3%7D%24%2F%2C%20'').replace(%2F%5E.%2B%5C.%2F%2C%20'')%3Bvar%20i%20%3D%20document.activeElement%3Bif%20(i.tagName%20%3D%3D%20%22INPUT%22%20%7C%7C%20i.tagName%20%3D%3D%20%22TEXTAREA%22)%20%7Bi.value%20%3D%20'turlututu%2B'%20%2B%20w%20%2B%20'%40gmail.com'%3B%7D%7D)()t9: loads jQuery and converts JavaScript-based links (onclick) into real clickable href links
javascript:(function()%7Bfunction%20callback()%7B(function(%24)%7Bvar%20jQuery%3D%24%3B%24('body').find('a').each(function()%20%7Bvar%20href%3D%24(this).attr('onclick')%3Bif(href)%20%7Bhref%3Dhref.replace(%22location.href%3D'%22%2C%20'').replace(%2F'%24%2Fg%2C%20'')%3B%24(this).attr('href'%2Chref)%3B%7Dconsole.log(href)%3B%7D)%7D)(jQuery.noConflict(true))%7Dvar%20s%3Ddocument.createElement(%22script%22)%3Bs.src%3D%22https%3A%2F%2Fajax.googleapis.com%2Fajax%2Flibs%2Fjquery%2F1.11.1%2Fjquery.min.js%22%3Bif(s.addEventListener)%7Bs.addEventListener(%22load%22%2Ccallback%2Cfalse)%7Delse%20if(s.readyState)%7Bs.onreadystatechange%3Dcallback%7Ddocument.body.appendChild(s)%3B%7D)()