new file mode 100644
--- /dev/null
+++ b/browser/components/preferences/in-content/tries.js
@@ -0,0 +1,206 @@
+Trie = function() {
+ this.wordCount = 0;
+ this.children = [];
+ this.word = null;
+}
+
+Trie.prototype = {
+
+ insert: function(word){
+ let node = this;
+ if (word === "") {
+ return;
+ }
+ for (let character of word.split("")) {
+ if (node.children[character] === undefined || node.children[character] === null) {
+ node.children[character] = new Trie();
+ }
+ node = node.children[character];
+ }
+ node.wordCount++;
+ node.word = word;
+ },
+
+ completeWord: function(partialWord) {
+ let node = this;
+ let listOfWords = [];
+ let child = null;
+
+ if (node.wordCount > 0) {
+ listOfWords.push(partialWord);
+ }
+ for (let childNode in node.children) {
+ child = node.children[childNode];
+ listOfWords = listOfWords.concat(child.completeWord(partialWord+childNode));
+ }
+ return listOfWords;
+ },
+
+ listOfWords: function(){
+ let node = this;
+ if (node === undefined || node === null){
+ return [];
+ }
+ let wordsList = [];
+ let child = null;
+ if (node.word != null || node.word != undefined){
+ wordsList.push(node.word);
+ }
+ for (let char in node.children){
+ child = node.children[char];
+ wordsList = wordsList.concat(child.listOfWords());
+ }
+ return wordsList;
+ },
+
+ autoComplete: function(partialWord) {
+ let node = this;
+ let typos = node.levenshteinDistance(partialWord,1);
+ let arrayTypos = firstElement(typos);
+
+ for (let char of partialWord) {
+ if (node.children[char] === undefined || node.children[char] === null){
+ return new Set([].concat(arrayTypos));
+ }
+ node = node.children[char];
+ }
+ // return node.completeWord(partialWord);
+ let complete = node.listOfWords();
+ return new Set(complete.concat(arrayTypos));
+ },
+
+ levenshteinHelper: function(letter, word, previousRow, results, maxCost) {
+ let node = this;
+ let columns = word.length + 1;
+ let currentRow = [previousRow[0] + 1];
+ let insertCost = null, deleteCost = null, replaceCost = null;
+ let child = null;
+
+ for (let i=1; i<columns; i++) {
+ insertCost = currentRow[i - 1] + 1;
+ deleteCost = previousRow[i] + 1;
+
+ if (word[i - 1] != letter) {
+ replaceCost = previousRow[i - 1] + 1;
+ } else {
+ replaceCost = previousRow[i - 1];
+ }
+
+ currentRow.push(Math.min(insertCost,deleteCost,replaceCost));
+ }
+
+ if (currentRow[currentRow.length - 1] <= maxCost && node.wordCount > 0){
+ results.push([node.word, currentRow[currentRow.length - 1]]);
+ }
+
+ if (Math.min.apply(null,currentRow) <= maxCost) {
+ for (let character in node.children) {
+ child = node.children[character];
+ child.levenshteinHelper(character, word, currentRow, results, maxCost);
+ }
+ }
+ return results;
+ },
+
+ // wrote it with the help of http://stevehanov.ca/blog/index.php?id=114
+ levenshteinDistance: function(word, maxCost) {
+ let node = this;
+ let currentRow = Array.from(Array(word.length+1).keys());
+ let results = [];
+ let child = null;
+
+ for (let character in node.children){
+ child = node.children[character]
+ child.levenshteinHelper(character, word, currentRow, results, maxCost);
+ }
+ return results;
+ }
+}
+
+function firstElement(arry) {
+ let temp = [];
+ for (i=0; i<arry.length; i++){
+ temp.push(arry[i][0]);
+ }
+ return temp;
+}
+
+/*
+Testing out the spell checker
+let t = new Trie();
+t.insert("apps");
+t.insert("app");
+t.insert("ppp");
+t.insert("bpp");
+t.insert("acp");
+t.insert("apple");
+t.insert("test");
+t.insert("tasting");
+t.insert("help");
+t.insert("helps");
+
+let ans = t.levenshteinDistance("ap",2);
+*/
+String.isStopWord = function(word)
+{
+ var regex = new RegExp("\\b"+word+"\\b","i");
+ if(stopWords.search(regex) < 0)
+ {
+ return false;
+ }else
+ {
+ return true;
+ }
+}
+
+String.prototype.removeStopWords = function()
+{
+ words = new Array();
+
+ this.replace(/\b[\w]+\b/g,
+ function($0)
+ {
+ if(!String.isStopWord($0))
+ {
+ words[words.length] = $0.trim();
+ }
+ }
+ );
+ return words.join(" ");
+}
+
+var stopWords = "a,able,about,above,abst,accordance,according,accordingly,across,act,actually,added,adj,\
+affected,affecting,affects,after,afterwards,again,against,ah,all,almost,alone,along,already,also,although,\
+always,am,among,amongst,an,and,announce,another,any,anybody,anyhow,anymore,anyone,anything,anyway,anyways,\
+anywhere,apparently,approximately,are,aren,arent,arise,around,as,aside,ask,asking,at,auth,available,away,awfully,\
+b,back,be,became,because,become,becomes,becoming,been,before,beforehand,begin,beginning,beginnings,begins,behind,\
+being,believe,below,beside,besides,between,beyond,biol,both,brief,briefly,but,by,c,ca,came,can,cannot,can't,cause,causes,\
+certain,certainly,co,com,come,comes,contain,containing,contains,could,couldnt,d,date,did,didn't,different,do,does,doesn't,\
+doing,done,don't,down,downwards,due,during,e,each,ed,edu,effect,eg,eight,eighty,either,else,elsewhere,end,ending,enough,\
+especially,et,et-al,etc,even,ever,every,everybody,everyone,everything,everywhere,ex,except,f,far,few,ff,fifth,first,five,fix,\
+followed,following,follows,for,former,formerly,forth,found,four,from,further,furthermore,g,gave,get,gets,getting,give,given,gives,\
+giving,go,goes,gone,got,gotten,h,had,happens,hardly,has,hasn't,have,haven't,having,he,hed,hence,her,here,hereafter,hereby,herein,\
+heres,hereupon,hers,herself,hes,hi,hid,him,himself,his,hither,home,how,howbeit,however,hundred,i,id,ie,if,i'll,im,immediate,\
+immediately,importance,important,in,inc,indeed,index,information,instead,into,invention,inward,is,isn't,it,itd,it'll,its,itself,\
+i've,j,just,k,keep,keeps,kept,kg,km,know,known,knows,l,largely,last,lately,later,latter,latterly,least,less,lest,let,lets,like,\
+liked,likely,line,little,'ll,look,looking,looks,ltd,m,made,mainly,make,makes,many,may,maybe,me,mean,means,meantime,meanwhile,\
+merely,mg,might,million,miss,ml,more,moreover,most,mostly,mr,mrs,much,mug,must,my,myself,n,na,name,namely,nay,nd,near,nearly,\
+necessarily,necessary,need,needs,neither,never,nevertheless,new,next,nine,ninety,no,nobody,non,none,nonetheless,noone,nor,\
+normally,nos,not,noted,nothing,now,nowhere,o,obtain,obtained,obviously,of,off,often,oh,ok,okay,old,omitted,on,once,one,ones,\
+only,onto,or,ord,other,others,otherwise,ought,our,ours,ourselves,out,outside,over,overall,owing,own,p,page,pages,part,\
+particular,particularly,past,per,perhaps,placed,please,plus,poorly,possible,possibly,potentially,pp,predominantly,present,\
+previously,primarily,probably,promptly,proud,provides,put,q,que,quickly,quite,qv,r,ran,rather,rd,re,readily,really,recent,\
+recently,ref,refs,regarding,regardless,regards,related,relatively,research,respectively,resulted,resulting,results,right,run,s,\
+said,same,saw,say,saying,says,sec,section,see,seeing,seem,seemed,seeming,seems,seen,self,selves,sent,seven,several,shall,she,shed,\
+she'll,shes,should,shouldn't,show,showed,shown,showns,shows,significant,significantly,similar,similarly,since,six,slightly,so,\
+some,somebody,somehow,someone,somethan,something,sometime,sometimes,somewhat,somewhere,soon,sorry,specifically,specified,specify,\
+specifying,still,stop,strongly,sub,substantially,successfully,such,sufficiently,suggest,sup,sure,t,take,taken,taking,tell,tends,\
+th,than,thank,thanks,thanx,that,that'll,thats,that've,the,their,theirs,them,themselves,then,thence,there,thereafter,thereby,\
+thered,therefore,therein,there'll,thereof,therere,theres,thereto,thereupon,there've,these,they,theyd,they'll,theyre,they've,\
+think,this,those,thou,though,thoughh,thousand,throug,through,throughout,thru,thus,til,tip,to,together,too,took,toward,towards,\
+tried,tries,truly,try,trying,ts,twice,two,u,un,under,unfortunately,unless,unlike,unlikely,until,unto,up,upon,ups,us,use,used,\
+useful,usefully,usefulness,uses,using,usually,v,value,various,'ve,very,via,viz,vol,vols,vs,w,want,wants,was,wasn't,way,we,wed,\
+welcome,we'll,went,were,weren't,we've,what,whatever,what'll,whats,when,whence,whenever,where,whereafter,whereas,whereby,wherein,\
+wheres,whereupon,wherever,whether,which,while,whim,whither,who,whod,whoever,whole,who'll,whom,whomever,whos,whose,why,widely,\
+willing,wish,with,within,without,won't,words,world,would,wouldn't,www,x,y,yes,yet,you,youd,you'll,your,youre,yours,yourself,\
+yourselves,you've,z,zero";