diff --git a/bower.json b/bower.json
index 77ff9831d..ac7c293ca 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.558",
+  "version": "1.0.566",
   "keywords": [
     "Mozilla",
     "pdf",
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 895f63bde..241378a03 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.558';
-PDFJS.build = 'c86836a';
+PDFJS.version = '1.0.566';
+PDFJS.build = 'cb59b57';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -7962,12 +7962,12 @@ var Dict = (function DictClosure() {
     get: function Dict_get(key1, key2, key3) {
       var value;
       var xref = this.xref;
-      if (typeof (value = this.map[key1]) != 'undefined' || key1 in this.map ||
-          typeof key2 == 'undefined') {
+      if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map ||
+          typeof key2 === 'undefined') {
         return xref ? xref.fetchIfRef(value) : value;
       }
-      if (typeof (value = this.map[key2]) != 'undefined' || key2 in this.map ||
-          typeof key3 == 'undefined') {
+      if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map ||
+          typeof key3 === 'undefined') {
         return xref ? xref.fetchIfRef(value) : value;
       }
       value = this.map[key3] || null;
@@ -8516,7 +8516,7 @@ var Catalog = (function CatalogClosure() {
           for (var i = 0; i < kids.length; i++) {
             var kid = kids[i];
             assert(isRef(kid), 'kids must be a ref');
-            if (kid.num == kidRef.num) {
+            if (kid.num === kidRef.num) {
               found = true;
               break;
             }
@@ -8840,7 +8840,7 @@ var XRef = (function XRefClosure() {
         // finding byte sequence
         while (offset < dataLength) {
           var i = 0;
-          while (i < length && data[offset + i] == what[i]) {
+          while (i < length && data[offset + i] === what[i]) {
             ++i;
           }
           if (i >= length) {
@@ -10231,7 +10231,7 @@ var PDFFunction = (function PDFFunctionClosure() {
         //var mask = IR[8];
         var range = IR[9];
 
-        if (m != args.length) {
+        if (m !== args.length) {
           error('Incorrect number of arguments: ' + m + ' != ' +
                 args.length);
         }
@@ -10333,7 +10333,7 @@ var PDFFunction = (function PDFFunctionClosure() {
       var length = diff.length;
 
       return function constructInterpolatedFromIRResult(args) {
-        var x = n == 1 ? args[0] : Math.pow(args[0], n);
+        var x = (n === 1 ? args[0] : Math.pow(args[0], n));
 
         var out = [];
         for (var j = 0; j < length; ++j) {
@@ -10353,7 +10353,7 @@ var PDFFunction = (function PDFFunctionClosure() {
       }
 
       var inputSize = domain.length / 2;
-      if (inputSize != 1) {
+      if (inputSize !== 1) {
         error('Bad domain for stiched function');
       }
 
@@ -10497,7 +10497,7 @@ var PDFFunction = (function PDFFunctionClosure() {
 
 function isPDFFunction(v) {
   var fnDict;
-  if (typeof v != 'object') {
+  if (typeof v !== 'object') {
     return false;
   } else if (isDict(v)) {
     fnDict = v;
@@ -10571,7 +10571,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
       var operator, a, b;
       while (counter < length) {
         operator = operators[counter++];
-        if (typeof operator == 'number') {
+        if (typeof operator === 'number') {
           // Operator is really an operand and should be pushed to the stack.
           stack.push(operator);
           continue;
@@ -10652,7 +10652,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
           case 'eq':
             b = stack.pop();
             a = stack.pop();
-            stack.push(a == b);
+            stack.push(a === b);
             break;
           case 'exch':
             stack.roll(2, 1);
@@ -10719,7 +10719,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
           case 'ne':
             b = stack.pop();
             a = stack.pop();
-            stack.push(a != b);
+            stack.push(a !== b);
             break;
           case 'neg':
             a = stack.pop();
@@ -10779,7 +10779,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
             b = stack.pop();
             a = stack.pop();
             if (isBool(a) && isBool(b)) {
-              stack.push(a != b);
+              stack.push(a !== b);
             } else {
               stack.push(a ^ b);
             }
@@ -13895,13 +13895,13 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
       var coordsArr = this.coordsArr;
       var shadingType = this.shadingType;
       var type, p0, p1, r0, r1;
-      if (shadingType == PatternType.AXIAL) {
+      if (shadingType === PatternType.AXIAL) {
         p0 = [coordsArr[0], coordsArr[1]];
         p1 = [coordsArr[2], coordsArr[3]];
         r0 = null;
         r1 = null;
         type = 'axial';
-      } else if (shadingType == PatternType.RADIAL) {
+      } else if (shadingType === PatternType.RADIAL) {
         p0 = [coordsArr[0], coordsArr[1]];
         p1 = [coordsArr[3], coordsArr[4]];
         r0 = coordsArr[2];
@@ -20081,7 +20081,7 @@ var Font = (function FontClosure() {
 
     this.toFontChar = [];
 
-    if (properties.type == 'Type3') {
+    if (properties.type === 'Type3') {
       for (charCode = 0; charCode < 256; charCode++) {
         this.toFontChar[charCode] = (this.differences[charCode] ||
                                      properties.defaultEncoding[charCode]);
@@ -20111,13 +20111,13 @@ var Font = (function FontClosure() {
       var isStandardFont = fontName in stdFontMap;
       fontName = stdFontMap[fontName] || nonStdFontMap[fontName] || fontName;
 
-      this.bold = (fontName.search(/bold/gi) != -1);
-      this.italic = ((fontName.search(/oblique/gi) != -1) ||
-                     (fontName.search(/italic/gi) != -1));
+      this.bold = (fontName.search(/bold/gi) !== -1);
+      this.italic = ((fontName.search(/oblique/gi) !== -1) ||
+                     (fontName.search(/italic/gi) !== -1));
 
       // Use 'name' instead of 'fontName' here because the original
       // name ArialBlack for example will be replaced by Helvetica.
-      this.black = (name.search(/Black/g) != -1);
+      this.black = (name.search(/Black/g) !== -1);
 
       // if at least one width is present, remeasure all chars when exists
       this.remeasure = Object.keys(this.widths).length > 0;
@@ -20166,7 +20166,7 @@ var Font = (function FontClosure() {
     }
 
     // Some fonts might use wrong font types for Type1C or CIDFontType0C
-    if (subtype == 'Type1C' && (type != 'Type1' && type != 'MMType1')) {
+    if (subtype === 'Type1C' && (type !== 'Type1' && type !== 'MMType1')) {
       // Some TrueType fonts by mistake claim Type1C
       if (isTrueTypeFile(file)) {
         subtype = 'TrueType';
@@ -20174,7 +20174,7 @@ var Font = (function FontClosure() {
         type = 'Type1';
       }
     }
-    if (subtype == 'CIDFontType0C' && type != 'CIDFontType0') {
+    if (subtype === 'CIDFontType0C' && type !== 'CIDFontType0') {
       type = 'CIDFontType0';
     }
     // XXX: Temporarily change the type for open type so we trigger a warning.
@@ -20271,7 +20271,7 @@ var Font = (function FontClosure() {
 
   function createOpenTypeHeader(sfnt, file, numTables) {
     // Windows hates the Mac TrueType sfnt version number
-    if (sfnt == 'true') {
+    if (sfnt === 'true') {
       sfnt = string32(0x00010000);
     }
 
@@ -20425,7 +20425,7 @@ var Font = (function FontClosure() {
       var codeIndices = [codes[n].glyphId];
       ++n;
       var end = start;
-      while (n < length && end + 1 == codes[n].fontCharCode) {
+      while (n < length && end + 1 === codes[n].fontCharCode) {
         codeIndices.push(codes[n].glyphId);
         ++end;
         ++n;
@@ -20806,7 +20806,7 @@ var Font = (function FontClosure() {
         var data = file.getBytes(length);
         file.pos = previousPosition;
 
-        if (tag == 'head') {
+        if (tag === 'head') {
           // clearing checksum adjustment
           data[8] = data[9] = data[10] = data[11] = 0;
           data[17] |= 0x20; //Set font optimized for cleartype flag
@@ -20857,7 +20857,7 @@ var Font = (function FontClosure() {
           var offset = font.getInt32() >>> 0;
           var useTable = false;
 
-          if (platformId == 1 && encodingId === 0) {
+          if (platformId === 1 && encodingId === 0) {
             useTable = true;
             // Continue the loop since there still may be a higher priority
             // table.
@@ -20959,7 +20959,7 @@ var Font = (function FontClosure() {
             offsetIndex = segment.offsetIndex;
 
             for (j = start; j <= end; j++) {
-              if (j == 0xFFFF) {
+              if (j === 0xFFFF) {
                 continue;
               }
 
@@ -20975,7 +20975,7 @@ var Font = (function FontClosure() {
               });
             }
           }
-        } else if (format == 6) {
+        } else if (format === 6) {
           // Format 6 is a 2-bytes dense mapping, which means the font data
           // lives glue together even if they are pretty far in the unicode
           // table. (This looks weird, so I can have missed something), this
@@ -21283,7 +21283,7 @@ var Font = (function FontClosure() {
             break;
           case 0x00020000:
             var numGlyphs = font.getUint16();
-            if (numGlyphs != maxpNumGlyphs) {
+            if (numGlyphs !== maxpNumGlyphs) {
               valid = false;
               break;
             }
@@ -21359,8 +21359,8 @@ var Font = (function FontClosure() {
             offset: font.getUint16()
           };
           // using only Macintosh and Windows platform/encoding names
-          if ((r.platform == 1 && r.encoding === 0 && r.language === 0) ||
-              (r.platform == 3 && r.encoding == 1 && r.language == 0x409)) {
+          if ((r.platform === 1 && r.encoding === 0 && r.language === 0) ||
+              (r.platform === 3 && r.encoding === 1 && r.language === 0x409)) {
             records.push(r);
           }
         }
@@ -21694,7 +21694,7 @@ var Font = (function FontClosure() {
       }
 
       var dupFirstEntry = false;
-      if (properties.type == 'CIDFontType2' && properties.toUnicode &&
+      if (properties.type === 'CIDFontType2' && properties.toUnicode &&
           properties.toUnicode[0] > '\u0000') {
         // oracle's defect (see 3427), duplicating first entry
         dupFirstEntry = true;
@@ -22403,7 +22403,7 @@ var Font = (function FontClosure() {
           charcode = chars.charCodeAt(i);
           glyph = this.charToGlyph(charcode);
           glyphs.push(glyph);
-          if (charcode == 0x20) {
+          if (charcode === 0x20) {
             glyphs.push(null);
           }
         }
@@ -23241,7 +23241,7 @@ var Type1Font = function Type1Font(name, file, properties) {
   var headerBlockLength = properties.length1;
   var eexecBlockLength = properties.length2;
   var pfbHeader = file.peekBytes(PFB_HEADER_SIZE);
-  var pfbHeaderPresent = pfbHeader[0] == 0x80 && pfbHeader[1] == 0x01;
+  var pfbHeaderPresent = pfbHeader[0] === 0x80 && pfbHeader[1] === 0x01;
   if (pfbHeaderPresent) {
     file.skip(PFB_HEADER_SIZE);
     headerBlockLength = (pfbHeader[5] << 24) | (pfbHeader[4] << 16) |
@@ -23399,7 +23399,7 @@ Type1Font.prototype = {
       // thought mapping names that aren't in the standard strings to .notdef
       // was fine, however in issue818 when mapping them all to .notdef the
       // adieresis glyph no longer worked.
-      if (index == -1) {
+      if (index === -1) {
         index = 0;
       }
       charsetArray.push((index >> 8) & 0xff, index & 0xff);
@@ -23757,12 +23757,12 @@ var CFFParser = (function CFFParserClosure() {
           var b1 = b >> 4;
           var b2 = b & 15;
 
-          if (b1 == eof) {
+          if (b1 === eof) {
             break;
           }
           str += lookup[b1];
 
-          if (b2 == eof) {
+          if (b2 === eof) {
             break;
           }
           str += lookup[b2];
@@ -23882,7 +23882,7 @@ var CFFParser = (function CFFParserClosure() {
         for (var j = 0; j < length;) {
           var value = data[j++];
           var validationCommand = null;
-          if (value == 12) {
+          if (value === 12) {
             var q = data[j++];
             if (q === 0) {
               // The CFF specification state that the 'dotsection' command
@@ -23900,7 +23900,7 @@ var CFFParser = (function CFFParserClosure() {
             stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16)) >> 16;
             j += 2;
             stackSize++;
-          } else if (value == 14) {
+          } else if (value === 14) {
             if (stackSize >= 4) {
               stackSize -= 4;
               if (SEAC_ANALYSIS_ENABLED) {
@@ -23917,12 +23917,12 @@ var CFFParser = (function CFFParserClosure() {
                                 -((value - 251) << 8) - data[j] - 108);
             j++;
             stackSize++;
-          } else if (value == 255) {  // number (32 bit)
+          } else if (value === 255) {  // number (32 bit)
             stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16) |
                                 (data[j + 2] << 8) | data[j + 3]) / 65536;
             j += 4;
             stackSize++;
-          } else if (value == 19 || value == 20) {
+          } else if (value === 19 || value === 20) {
             hints += stackSize >> 1;
             j += (hints + 7) >> 3; // skipping right amount of hints flag data
             stackSize = 0;
@@ -24015,10 +24015,10 @@ var CFFParser = (function CFFParserClosure() {
       if (pos === 0) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.ISO_ADOBE,
                               ISOAdobeCharset);
-      } else if (pos == 1) {
+      } else if (pos === 1) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT,
                               ExpertCharset);
-      } else if (pos == 2) {
+      } else if (pos === 2) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT_SUBSET,
                               ExpertSubsetCharset);
       }
@@ -24086,14 +24086,14 @@ var CFFParser = (function CFFParserClosure() {
         }
       }
 
-      if (pos === 0 || pos == 1) {
+      if (pos === 0 || pos === 1) {
         predefined = true;
         format = pos;
         var baseEncoding = pos ? Encodings.ExpertEncoding :
                                  Encodings.StandardEncoding;
         for (i = 0, ii = charset.length; i < ii; i++) {
           var index = baseEncoding.indexOf(charset[i]);
-          if (index != -1) {
+          if (index !== -1) {
             encoding[index] = i;
           }
         }
@@ -24620,7 +24620,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
       return output.data;
     },
     encodeNumber: function CFFCompiler_encodeNumber(value) {
-      if (parseFloat(value) == parseInt(value, 10) && !isNaN(value)) { // isInt
+      if (parseFloat(value) === parseInt(value, 10) && !isNaN(value)) { // isInt
         return this.encodeInteger(value);
       } else {
         return this.encodeFloat(value);
@@ -34281,7 +34281,7 @@ var PostScriptParser = (function PostScriptParserClosure() {
       this.token = this.lexer.getToken();
     },
     accept: function PostScriptParser_accept(type) {
-      if (this.token.type == type) {
+      if (this.token.type === type) {
         this.nextToken();
         return true;
       }
@@ -34408,7 +34408,7 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
           if (ch === 0x0A || ch === 0x0D) {
             comment = false;
           }
-        } else if (ch == 0x25) { // '%'
+        } else if (ch === 0x25) { // '%'
           comment = true;
         } else if (!Lexer.isSpace(ch)) {
           break;
@@ -37008,7 +37008,7 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
         },
 
         onError: function onError(status) {
-          if (status == 404) {
+          if (status === 404) {
             var exception = new MissingPDFException('Missing PDF "' +
                                                     source.url + '".');
             handler.send('MissingPDF', { exception: exception });
@@ -41875,7 +41875,7 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) {
     update: function MurmurHash3_64_update(input) {
       var useUint32ArrayView = alwaysUseUint32ArrayView;
       var i;
-      if (typeof input == 'string') {
+      if (typeof input === 'string') {
         var data = new Uint8Array(input.length * 2);
         var length = 0;
         for (i = 0; i < input.length; i++) {
diff --git a/build/pdf.js b/build/pdf.js
index 020cf9fb8..f71524671 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.558';
-PDFJS.build = 'c86836a';
+PDFJS.version = '1.0.566';
+PDFJS.build = 'cb59b57';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 460874026..2df4bffa4 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -22,8 +22,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.558';
-PDFJS.build = 'c86836a';
+PDFJS.version = '1.0.566';
+PDFJS.build = 'cb59b57';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -3105,12 +3105,12 @@ var Dict = (function DictClosure() {
     get: function Dict_get(key1, key2, key3) {
       var value;
       var xref = this.xref;
-      if (typeof (value = this.map[key1]) != 'undefined' || key1 in this.map ||
-          typeof key2 == 'undefined') {
+      if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map ||
+          typeof key2 === 'undefined') {
         return xref ? xref.fetchIfRef(value) : value;
       }
-      if (typeof (value = this.map[key2]) != 'undefined' || key2 in this.map ||
-          typeof key3 == 'undefined') {
+      if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map ||
+          typeof key3 === 'undefined') {
         return xref ? xref.fetchIfRef(value) : value;
       }
       value = this.map[key3] || null;
@@ -3659,7 +3659,7 @@ var Catalog = (function CatalogClosure() {
           for (var i = 0; i < kids.length; i++) {
             var kid = kids[i];
             assert(isRef(kid), 'kids must be a ref');
-            if (kid.num == kidRef.num) {
+            if (kid.num === kidRef.num) {
               found = true;
               break;
             }
@@ -3983,7 +3983,7 @@ var XRef = (function XRefClosure() {
         // finding byte sequence
         while (offset < dataLength) {
           var i = 0;
-          while (i < length && data[offset + i] == what[i]) {
+          while (i < length && data[offset + i] === what[i]) {
             ++i;
           }
           if (i >= length) {
@@ -5374,7 +5374,7 @@ var PDFFunction = (function PDFFunctionClosure() {
         //var mask = IR[8];
         var range = IR[9];
 
-        if (m != args.length) {
+        if (m !== args.length) {
           error('Incorrect number of arguments: ' + m + ' != ' +
                 args.length);
         }
@@ -5476,7 +5476,7 @@ var PDFFunction = (function PDFFunctionClosure() {
       var length = diff.length;
 
       return function constructInterpolatedFromIRResult(args) {
-        var x = n == 1 ? args[0] : Math.pow(args[0], n);
+        var x = (n === 1 ? args[0] : Math.pow(args[0], n));
 
         var out = [];
         for (var j = 0; j < length; ++j) {
@@ -5496,7 +5496,7 @@ var PDFFunction = (function PDFFunctionClosure() {
       }
 
       var inputSize = domain.length / 2;
-      if (inputSize != 1) {
+      if (inputSize !== 1) {
         error('Bad domain for stiched function');
       }
 
@@ -5640,7 +5640,7 @@ var PDFFunction = (function PDFFunctionClosure() {
 
 function isPDFFunction(v) {
   var fnDict;
-  if (typeof v != 'object') {
+  if (typeof v !== 'object') {
     return false;
   } else if (isDict(v)) {
     fnDict = v;
@@ -5714,7 +5714,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
       var operator, a, b;
       while (counter < length) {
         operator = operators[counter++];
-        if (typeof operator == 'number') {
+        if (typeof operator === 'number') {
           // Operator is really an operand and should be pushed to the stack.
           stack.push(operator);
           continue;
@@ -5795,7 +5795,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
           case 'eq':
             b = stack.pop();
             a = stack.pop();
-            stack.push(a == b);
+            stack.push(a === b);
             break;
           case 'exch':
             stack.roll(2, 1);
@@ -5862,7 +5862,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
           case 'ne':
             b = stack.pop();
             a = stack.pop();
-            stack.push(a != b);
+            stack.push(a !== b);
             break;
           case 'neg':
             a = stack.pop();
@@ -5922,7 +5922,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
             b = stack.pop();
             a = stack.pop();
             if (isBool(a) && isBool(b)) {
-              stack.push(a != b);
+              stack.push(a !== b);
             } else {
               stack.push(a ^ b);
             }
@@ -9038,13 +9038,13 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
       var coordsArr = this.coordsArr;
       var shadingType = this.shadingType;
       var type, p0, p1, r0, r1;
-      if (shadingType == PatternType.AXIAL) {
+      if (shadingType === PatternType.AXIAL) {
         p0 = [coordsArr[0], coordsArr[1]];
         p1 = [coordsArr[2], coordsArr[3]];
         r0 = null;
         r1 = null;
         type = 'axial';
-      } else if (shadingType == PatternType.RADIAL) {
+      } else if (shadingType === PatternType.RADIAL) {
         p0 = [coordsArr[0], coordsArr[1]];
         p1 = [coordsArr[3], coordsArr[4]];
         r0 = coordsArr[2];
@@ -15224,7 +15224,7 @@ var Font = (function FontClosure() {
 
     this.toFontChar = [];
 
-    if (properties.type == 'Type3') {
+    if (properties.type === 'Type3') {
       for (charCode = 0; charCode < 256; charCode++) {
         this.toFontChar[charCode] = (this.differences[charCode] ||
                                      properties.defaultEncoding[charCode]);
@@ -15254,13 +15254,13 @@ var Font = (function FontClosure() {
       var isStandardFont = fontName in stdFontMap;
       fontName = stdFontMap[fontName] || nonStdFontMap[fontName] || fontName;
 
-      this.bold = (fontName.search(/bold/gi) != -1);
-      this.italic = ((fontName.search(/oblique/gi) != -1) ||
-                     (fontName.search(/italic/gi) != -1));
+      this.bold = (fontName.search(/bold/gi) !== -1);
+      this.italic = ((fontName.search(/oblique/gi) !== -1) ||
+                     (fontName.search(/italic/gi) !== -1));
 
       // Use 'name' instead of 'fontName' here because the original
       // name ArialBlack for example will be replaced by Helvetica.
-      this.black = (name.search(/Black/g) != -1);
+      this.black = (name.search(/Black/g) !== -1);
 
       // if at least one width is present, remeasure all chars when exists
       this.remeasure = Object.keys(this.widths).length > 0;
@@ -15309,7 +15309,7 @@ var Font = (function FontClosure() {
     }
 
     // Some fonts might use wrong font types for Type1C or CIDFontType0C
-    if (subtype == 'Type1C' && (type != 'Type1' && type != 'MMType1')) {
+    if (subtype === 'Type1C' && (type !== 'Type1' && type !== 'MMType1')) {
       // Some TrueType fonts by mistake claim Type1C
       if (isTrueTypeFile(file)) {
         subtype = 'TrueType';
@@ -15317,7 +15317,7 @@ var Font = (function FontClosure() {
         type = 'Type1';
       }
     }
-    if (subtype == 'CIDFontType0C' && type != 'CIDFontType0') {
+    if (subtype === 'CIDFontType0C' && type !== 'CIDFontType0') {
       type = 'CIDFontType0';
     }
     // XXX: Temporarily change the type for open type so we trigger a warning.
@@ -15414,7 +15414,7 @@ var Font = (function FontClosure() {
 
   function createOpenTypeHeader(sfnt, file, numTables) {
     // Windows hates the Mac TrueType sfnt version number
-    if (sfnt == 'true') {
+    if (sfnt === 'true') {
       sfnt = string32(0x00010000);
     }
 
@@ -15568,7 +15568,7 @@ var Font = (function FontClosure() {
       var codeIndices = [codes[n].glyphId];
       ++n;
       var end = start;
-      while (n < length && end + 1 == codes[n].fontCharCode) {
+      while (n < length && end + 1 === codes[n].fontCharCode) {
         codeIndices.push(codes[n].glyphId);
         ++end;
         ++n;
@@ -15949,7 +15949,7 @@ var Font = (function FontClosure() {
         var data = file.getBytes(length);
         file.pos = previousPosition;
 
-        if (tag == 'head') {
+        if (tag === 'head') {
           // clearing checksum adjustment
           data[8] = data[9] = data[10] = data[11] = 0;
           data[17] |= 0x20; //Set font optimized for cleartype flag
@@ -16000,7 +16000,7 @@ var Font = (function FontClosure() {
           var offset = font.getInt32() >>> 0;
           var useTable = false;
 
-          if (platformId == 1 && encodingId === 0) {
+          if (platformId === 1 && encodingId === 0) {
             useTable = true;
             // Continue the loop since there still may be a higher priority
             // table.
@@ -16102,7 +16102,7 @@ var Font = (function FontClosure() {
             offsetIndex = segment.offsetIndex;
 
             for (j = start; j <= end; j++) {
-              if (j == 0xFFFF) {
+              if (j === 0xFFFF) {
                 continue;
               }
 
@@ -16118,7 +16118,7 @@ var Font = (function FontClosure() {
               });
             }
           }
-        } else if (format == 6) {
+        } else if (format === 6) {
           // Format 6 is a 2-bytes dense mapping, which means the font data
           // lives glue together even if they are pretty far in the unicode
           // table. (This looks weird, so I can have missed something), this
@@ -16426,7 +16426,7 @@ var Font = (function FontClosure() {
             break;
           case 0x00020000:
             var numGlyphs = font.getUint16();
-            if (numGlyphs != maxpNumGlyphs) {
+            if (numGlyphs !== maxpNumGlyphs) {
               valid = false;
               break;
             }
@@ -16502,8 +16502,8 @@ var Font = (function FontClosure() {
             offset: font.getUint16()
           };
           // using only Macintosh and Windows platform/encoding names
-          if ((r.platform == 1 && r.encoding === 0 && r.language === 0) ||
-              (r.platform == 3 && r.encoding == 1 && r.language == 0x409)) {
+          if ((r.platform === 1 && r.encoding === 0 && r.language === 0) ||
+              (r.platform === 3 && r.encoding === 1 && r.language === 0x409)) {
             records.push(r);
           }
         }
@@ -16837,7 +16837,7 @@ var Font = (function FontClosure() {
       }
 
       var dupFirstEntry = false;
-      if (properties.type == 'CIDFontType2' && properties.toUnicode &&
+      if (properties.type === 'CIDFontType2' && properties.toUnicode &&
           properties.toUnicode[0] > '\u0000') {
         // oracle's defect (see 3427), duplicating first entry
         dupFirstEntry = true;
@@ -17546,7 +17546,7 @@ var Font = (function FontClosure() {
           charcode = chars.charCodeAt(i);
           glyph = this.charToGlyph(charcode);
           glyphs.push(glyph);
-          if (charcode == 0x20) {
+          if (charcode === 0x20) {
             glyphs.push(null);
           }
         }
@@ -18384,7 +18384,7 @@ var Type1Font = function Type1Font(name, file, properties) {
   var headerBlockLength = properties.length1;
   var eexecBlockLength = properties.length2;
   var pfbHeader = file.peekBytes(PFB_HEADER_SIZE);
-  var pfbHeaderPresent = pfbHeader[0] == 0x80 && pfbHeader[1] == 0x01;
+  var pfbHeaderPresent = pfbHeader[0] === 0x80 && pfbHeader[1] === 0x01;
   if (pfbHeaderPresent) {
     file.skip(PFB_HEADER_SIZE);
     headerBlockLength = (pfbHeader[5] << 24) | (pfbHeader[4] << 16) |
@@ -18542,7 +18542,7 @@ Type1Font.prototype = {
       // thought mapping names that aren't in the standard strings to .notdef
       // was fine, however in issue818 when mapping them all to .notdef the
       // adieresis glyph no longer worked.
-      if (index == -1) {
+      if (index === -1) {
         index = 0;
       }
       charsetArray.push((index >> 8) & 0xff, index & 0xff);
@@ -18900,12 +18900,12 @@ var CFFParser = (function CFFParserClosure() {
           var b1 = b >> 4;
           var b2 = b & 15;
 
-          if (b1 == eof) {
+          if (b1 === eof) {
             break;
           }
           str += lookup[b1];
 
-          if (b2 == eof) {
+          if (b2 === eof) {
             break;
           }
           str += lookup[b2];
@@ -19025,7 +19025,7 @@ var CFFParser = (function CFFParserClosure() {
         for (var j = 0; j < length;) {
           var value = data[j++];
           var validationCommand = null;
-          if (value == 12) {
+          if (value === 12) {
             var q = data[j++];
             if (q === 0) {
               // The CFF specification state that the 'dotsection' command
@@ -19043,7 +19043,7 @@ var CFFParser = (function CFFParserClosure() {
             stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16)) >> 16;
             j += 2;
             stackSize++;
-          } else if (value == 14) {
+          } else if (value === 14) {
             if (stackSize >= 4) {
               stackSize -= 4;
               if (SEAC_ANALYSIS_ENABLED) {
@@ -19060,12 +19060,12 @@ var CFFParser = (function CFFParserClosure() {
                                 -((value - 251) << 8) - data[j] - 108);
             j++;
             stackSize++;
-          } else if (value == 255) {  // number (32 bit)
+          } else if (value === 255) {  // number (32 bit)
             stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16) |
                                 (data[j + 2] << 8) | data[j + 3]) / 65536;
             j += 4;
             stackSize++;
-          } else if (value == 19 || value == 20) {
+          } else if (value === 19 || value === 20) {
             hints += stackSize >> 1;
             j += (hints + 7) >> 3; // skipping right amount of hints flag data
             stackSize = 0;
@@ -19158,10 +19158,10 @@ var CFFParser = (function CFFParserClosure() {
       if (pos === 0) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.ISO_ADOBE,
                               ISOAdobeCharset);
-      } else if (pos == 1) {
+      } else if (pos === 1) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT,
                               ExpertCharset);
-      } else if (pos == 2) {
+      } else if (pos === 2) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT_SUBSET,
                               ExpertSubsetCharset);
       }
@@ -19229,14 +19229,14 @@ var CFFParser = (function CFFParserClosure() {
         }
       }
 
-      if (pos === 0 || pos == 1) {
+      if (pos === 0 || pos === 1) {
         predefined = true;
         format = pos;
         var baseEncoding = pos ? Encodings.ExpertEncoding :
                                  Encodings.StandardEncoding;
         for (i = 0, ii = charset.length; i < ii; i++) {
           var index = baseEncoding.indexOf(charset[i]);
-          if (index != -1) {
+          if (index !== -1) {
             encoding[index] = i;
           }
         }
@@ -19763,7 +19763,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
       return output.data;
     },
     encodeNumber: function CFFCompiler_encodeNumber(value) {
-      if (parseFloat(value) == parseInt(value, 10) && !isNaN(value)) { // isInt
+      if (parseFloat(value) === parseInt(value, 10) && !isNaN(value)) { // isInt
         return this.encodeInteger(value);
       } else {
         return this.encodeFloat(value);
@@ -29424,7 +29424,7 @@ var PostScriptParser = (function PostScriptParserClosure() {
       this.token = this.lexer.getToken();
     },
     accept: function PostScriptParser_accept(type) {
-      if (this.token.type == type) {
+      if (this.token.type === type) {
         this.nextToken();
         return true;
       }
@@ -29551,7 +29551,7 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
           if (ch === 0x0A || ch === 0x0D) {
             comment = false;
           }
-        } else if (ch == 0x25) { // '%'
+        } else if (ch === 0x25) { // '%'
           comment = true;
         } else if (!Lexer.isSpace(ch)) {
           break;
@@ -32151,7 +32151,7 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
         },
 
         onError: function onError(status) {
-          if (status == 404) {
+          if (status === 404) {
             var exception = new MissingPDFException('Missing PDF "' +
                                                     source.url + '".');
             handler.send('MissingPDF', { exception: exception });
@@ -37018,7 +37018,7 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) {
     update: function MurmurHash3_64_update(input) {
       var useUint32ArrayView = alwaysUseUint32ArrayView;
       var i;
-      if (typeof input == 'string') {
+      if (typeof input === 'string') {
         var data = new Uint8Array(input.length * 2);
         var length = 0;
         for (i = 0; i < input.length; i++) {
diff --git a/package.json b/package.json
index 568ebe3e3..31589cf6f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.558",
+  "version": "1.0.566",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",