diff --git a/top1m/parse_results.py b/top1m/parse_results.py
index d95d60c..ec17f39 100644
--- a/top1m/parse_results.py
+++ b/top1m/parse_results.py
@@ -21,9 +21,38 @@ def natural_sort(l):
     alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ]
     return sorted(l, key = alphanum_key)
 
+""" list of ciphers offerred by Firefox 29 by default """
+firefox_ciphers=[
+        'ECDHE-ECDSA-AES128-GCM-SHA256',
+        'ECDHE-RSA-AES128-GCM-SHA256',
+        'ECDHE-ECDSA-AES256-SHA',
+        'ECDHE-ECDSA-AES128-SHA',
+        'ECDHE-RSA-AES128-SHA',
+        'ECDHE-RSA-AES256-SHA',
+        'ECDHE-RSA-DES-CBC3-SHA',
+        'ECDHE-ECDSA-RC4-SHA',
+        'ECDHE-RSA-RC4-SHA',
+        'DHE-RSA-AES128-SHA',
+        'DHE-DSS-AES128-SHA',
+        'DHE-RSA-CAMELLIA128-SHA',
+        'DHE-RSA-AES256-SHA',
+        'DHE-DSS-AES256-SHA',
+        'DHE-RSA-CAMELLIA256-SHA',
+        'EDH-RSA-DES-CBC3-SHA',
+        'AES128-SHA',
+        'CAMELLIA128-SHA',
+        'AES256-SHA',
+        'CAMELLIA256-SHA',
+        'DES-CBC3-SHA',
+        'RC4-SHA',
+        'RC4-MD5']
+
 report_untrused=False
 
 cipherstats = defaultdict(int)
+FF_RC4_Only_cipherstats = defaultdict(int)
+FF_RC4_preferred_cipherstats = defaultdict(int)
+FF_incompatible_cipherstats = defaultdict(int)
 pfsstats = defaultdict(int)
 protocolstats = defaultdict(int)
 handshakestats = defaultdict(int)
@@ -53,6 +82,11 @@ for r,d,flist in os.walk(path):
         DES3 = False
         CAMELLIA = False
         RC4 = False
+        """ the following depends on FF_compat, so by default it can be True """
+        RC4_Only_FF = True
+        FF_compat = False
+        temp_FF_incompat = {}
+        FF_RC4_Pref = None
         ADH = False
         DHE = False
         AECDH = False
@@ -92,6 +126,20 @@ for r,d,flist in os.walk(path):
                 if 'False' in entry['trusted'] and report_untrused == False:
                     continue
 
+                # check if the advertised ciphers are not effectively RC4 Only
+                # for firefox or incompatible with firefox
+                if entry['cipher'] in firefox_ciphers:
+                    # if this is first cipher and we already are getting RC4
+                    # then it means that RC4 is preferred
+                    if not FF_compat:
+                        if 'RC4' in entry['cipher']:
+                            FF_RC4_Pref = True
+                    FF_compat = True
+                    if not 'RC4' in entry['cipher']:
+                        RC4_Only_FF = False
+                else:
+                    temp_FF_incompat[entry['cipher']] = 1
+
                 """ store the ciphers supported """
                 if 'ADH' in entry['cipher'] or 'AECDH' in entry['cipher']:
                     ciphertypes += 1
@@ -269,6 +317,20 @@ for r,d,flist in os.walk(path):
                         cipherstats['RC4 forced in TLS1.1+'] += 1
                 cipherstats['RC4 Preferred'] += 1
 
+        if FF_compat:
+            if RC4_Only_FF and ciphertypes != 1:
+                cipherstats['x:FF 29 RC4 Only'] += 1
+                for cipher in temp_FF_incompat:
+                    FF_RC4_Only_cipherstats[cipher] += 1
+            if FF_RC4_Pref and not 'RC4' in results['ciphersuite'][0]['cipher']:
+                cipherstats['x:FF 29 RC4 Preferred'] += 1
+                for cipher in temp_FF_incompat:
+                    FF_RC4_preferred_cipherstats[cipher] += 1
+        else:
+            cipherstats['x:FF 29 incompatible'] += 1
+            for cipher in temp_FF_incompat:
+                FF_incompatible_cipherstats[cipher] += 1
+
         for cipher in tempcipherstats:
             cipherstats[cipher] += 1
 
@@ -322,6 +384,13 @@ for r,d,flist in os.walk(path):
     #if total % 1999 == 0:
     #    break
 
+""" The 'x:FF 29 RC4 Preferred' counts only sites that effectively prefer
+    RC4 when using FF, to make reporting more readable, sum it with sites
+    that do that for all ciphers"""
+
+if "x:FF 29 RC4 Preferred" in cipherstats and "RC4 Preferred" in cipherstats:
+    cipherstats['x:FF 29 RC4 Preferred'] += cipherstats['RC4 Preferred']
+
 print("SSL/TLS survey of %i websites from Alexa's top 1 million" % total)
 if report_untrused == False:
     print("Stats only from connections that did provide valid certificates")
@@ -334,6 +403,24 @@ for stat in sorted(cipherstats):
     percent = round(cipherstats[stat] / total * 100, 4)
     sys.stdout.write(stat.ljust(25) + " " + str(cipherstats[stat]).ljust(10) + str(percent).ljust(4) + "\n")
 
+print("\nFF 29 RC4 Only other ciphers  Count    Percent")
+print("-----------------------------+---------+------")
+for stat in sorted(FF_RC4_Only_cipherstats):
+    percent = round(FF_RC4_Only_cipherstats[stat] / total * 100, 4)
+    sys.stdout.write(stat.ljust(30) + " " + str(FF_RC4_Only_cipherstats[stat]).ljust(10) + str(percent).ljust(4) + "\n")
+
+print("\nFF 29 RC4 pref other ciphers  Count    Percent")
+print("-----------------------------+---------+------")
+for stat in sorted(FF_RC4_preferred_cipherstats):
+    percent = round(FF_RC4_preferred_cipherstats[stat] / total * 100, 4)
+    sys.stdout.write(stat.ljust(30) + " " + str(FF_RC4_preferred_cipherstats[stat]).ljust(10) + str(percent).ljust(4) + "\n")
+
+print("\nFF 29 incompatible ciphers    Count    Percent")
+print("-----------------------------+---------+------")
+for stat in sorted(FF_incompatible_cipherstats):
+    percent = round(FF_incompatible_cipherstats[stat] / total * 100, 4)
+    sys.stdout.write(stat.ljust(30) + " " + str(FF_incompatible_cipherstats[stat]).ljust(10) + str(percent).ljust(4) + "\n")
+
 print("\nSupported Handshakes      Count     Percent")
 print("-------------------------+---------+-------")
 for stat in sorted(handshakestats):