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Firefox Releases

Firefox release notes are specific to each version of the application. Select your version from the list below to see the release notes for it.

  1. 156.0
  2. 155.0
    1. 155.0.1
  3. 154.0
    1. 154.0.1
  4. 153.0
    1. 153.0.1
    2. 153.0.3
    3. 153.0.4
    1. 153.0 ESR
    2. 153.1.0 ESR
    3. 153.2.0 ESR
    4. 153.3.0 ESR
  5. 152.0
    1. 152.0.1
    2. 152.0.2
    3. 152.0.3
    4. 152.0.4
    5. 152.0.5
    6. 152.0.6
  6. 151.0
    1. 151.0.1
    2. 151.0.2
    3. 151.0.3
    4. 151.0.4
  7. 150.0
    1. 150.0.1
    2. 150.0.2
    3. 150.0.3
  8. 149.0
    1. 149.0.2
  9. 148.0
    1. 148.0.2
  10. 147.0
    1. 147.0.1
    2. 147.0.2
    3. 147.0.3
    4. 147.0.4
  11. 146.0
    1. 146.0.1
  12. 145.0
    1. 145.0.1
    2. 145.0.2
  13. 144.0
    1. 144.0.2
  14. 143.0
    1. 143.0.1
    2. 143.0.3
    3. 143.0.4
  15. 142.0
    1. 142.0.1
  16. 141.0
    1. 141.0.2
    2. 141.0.3
  17. 140.0
    1. 140.0.1
    2. 140.0.2
    3. 140.0.4
    1. 140.0 ESR
    2. 140.1.0 ESR
    3. 140.2.0 ESR
    4. 140.3.0 ESR
    5. 140.3.1 ESR
    6. 140.4.0 ESR
    7. 140.5.0 ESR
    8. 140.6.0 ESR
    9. 140.7.0 ESR
    10. 140.7.1 ESR
    11. 140.8.0 ESR
    12. 140.9.0 ESR
    13. 140.9.1 ESR
    14. 140.10.0 ESR
    15. 140.10.1 ESR
    16. 140.10.2 ESR
    17. 140.11.0 ESR
    18. 140.12.0 ESR
    19. 140.13.0 ESR
    20. 140.14.0 ESR
    21. 140.15.0 ESR
    22. 140.16.0 ESR
  18. 139.0
    1. 139.0.1
    2. 139.0.4
  19. 138.0
    1. 138.0.1
    2. 138.0.3
    3. 138.0.4
  20. 137.0
    1. 137.0.1
    2. 137.0.2
  21. 136.0
    1. 136.0.1
    2. 136.0.2
    3. 136.0.3
    4. 136.0.4
  22. 135.0
    1. 135.0.1
  23. 134.0
    1. 134.0.1
    2. 134.0.2
  24. 133.0
    1. 133.0.3
  25. 132.0
    1. 132.0.1
    2. 132.0.2
  26. 131.0
    1. 131.0.2
    2. 131.0.3
  27. 130.0
    1. 130.0.1
  28. 129.0
    1. 129.0.1
    2. 129.0.2
  29. 128.0
    1. 128.0.2
    2. 128.0.3
    1. 128.0 ESR
    2. 128.1.0 ESR
    3. 128.2.0 ESR
    4. 128.3.0 ESR
    5. 128.3.1 ESR
    6. 128.4.0 ESR
    7. 128.5.0 ESR
    8. 128.5.1 ESR
    9. 128.5.2 ESR
    10. 128.6.0 ESR
    11. 128.7.0 ESR
    12. 128.8.0 ESR
    13. 128.8.1 ESR
    14. 128.9.0 ESR
    15. 128.10.0 ESR
    16. 128.10.1 ESR
    17. 128.11.0 ESR
    18. 128.12.0 ESR
    19. 128.13.0 ESR
    20. 128.14.0 ESR
  30. 127.0
    1. 127.0.1
    2. 127.0.2
  31. 126.0
    1. 126.0.1
  32. 125.0.1
    1. 125.0.2
    2. 125.0.3
  33. 124.0
    1. 124.0.1
    2. 124.0.2
  34. 123.0
    1. 123.0.1
  35. 122.0
    1. 122.0.1
  36. 121.0
    1. 121.0.1
  37. 120.0
    1. 120.0.1
  38. 119.0
    1. 119.0.1
  39. 118.0
    1. 118.0.1
    2. 118.0.2
  40. 117.0
    1. 117.0.1
  41. 116.0
    1. 116.0.1
    2. 116.0.2
    3. 116.0.3
  42. 115.0
    1. 115.0.1
    2. 115.0.2
    3. 115.0.3
    1. 115.0 ESR
    2. 115.0.1 ESR
    3. 115.0.2 ESR
    4. 115.0.3 ESR
    5. 115.1 ESR
    6. 115.1.0 ESR
    7. 115.2.0 ESR
    8. 115.2.1 ESR
    9. 115.3.0 ESR
    10. 115.3.1 ESR
    11. 115.4.0 ESR
    12. 115.5.0 ESR
    13. 115.6.0 ESR
    14. 115.7.0 ESR
    15. 115.8.0 ESR
    16. 115.9.0 ESR
    17. 115.9.1 ESR
    18. 115.10.0 ESR
    19. 115.11.0 ESR
    20. 115.12.0 ESR
    21. 115.13.0 ESR
    22. 115.14.0 ESR
    23. 115.15.0 ESR
    24. 115.16.0 ESR
    25. 115.16.1 ESR
    26. 115.17.0 ESR
    27. 115.18.0 ESR
    28. 115.19.0 ESR
    29. 115.20.0 ESR
    30. 115.21.0 ESR
    31. 115.21.1 ESR
    32. 115.22.0 ESR
    33. 115.23.0 ESR
    34. 115.23.1 ESR
    35. 115.24.0 ESR
    36. 115.25.0 ESR
    37. 115.26.0 ESR
    38. 115.27.0 ESR
    39. 115.28.0 ESR
    40. 115.29.0 ESR
    41. 115.30.0 ESR
    42. 115.31.0 ESR
    43. 115.32.0 ESR
    44. 115.32.1 ESR
    45. 115.33.0 ESR
    46. 115.34.0 ESR
    47. 115.34.1 ESR
    48. 115.35.0 ESR
    49. 115.35.1 ESR
    50. 115.35.2 ESR
    51. 115.36.0 ESR
    52. 115.37.0 ESR
    53. 115.38.0 ESR
    54. 115.39.0 ESR
    55. 115.40.0 ESR
    56. 115.41.0 ESR
  43. 114.0
    1. 114.0.1
    2. 114.0.2
  44. 113.0
    1. 113.0.1
    2. 113.0.2
  45. 112.0
    1. 112.0.1
    2. 112.0.2
  46. 111.0
    1. 111.0.1
  47. 110.0
    1. 110.0.1
  48. 109.0
    1. 109.0.1
  49. 108.0
    1. 108.0.1
    2. 108.0.2
  50. 107.0
    1. 107.0.1
  51. 106.0
    1. 106.0.1
    2. 106.0.2
    3. 106.0.3
    4. 106.0.4
    5. 106.0.5
  52. 105.0
    1. 105.0.1
    2. 105.0.2
    3. 105.0.3
  53. 104.0
    1. 104.0.1
    2. 104.0.2
  54. 103.0
    1. 103.0.1
    2. 103.0.2
  55. 102.0
    1. 102.0.1
    1. 102.0 ESR
    2. 102.0.1 ESR
    3. 102.1.0 ESR
    4. 102.2.0 ESR
    5. 102.3.0 ESR
    6. 102.4.0 ESR
    7. 102.5.0 ESR
    8. 102.6.0 ESR
    9. 102.7.0 ESR
    10. 102.8.0 ESR
    11. 102.9.0 ESR
    12. 102.10.0 ESR
    13. 102.11.0 ESR
    14. 102.12.0 ESR
    15. 102.13.0 ESR
    16. 102.14.0 ESR
    17. 102.15.0 ESR
    18. 102.15.1 ESR
  56. 101.0
    1. 101.0.1
  57. 100.0
    1. 100.0.1
    2. 100.0.2
  58. 99.0
    1. 99.0.1
  59. 98.0
    1. 98.0.1
    2. 98.0.2
  60. 97.0
    1. 97.0.1
    2. 97.0.2
  61. 96.0
    1. 96.0.1
    2. 96.0.2
    3. 96.0.3
  62. 95.0
    1. 95.0.1
    2. 95.0.2
  63. 94.0
    1. 94.0.1
    2. 94.0.2
  64. 93.0
  65. 92.0
    1. 92.0.1
  66. 91.0
    1. 91.0.1
    2. 91.0.2
    1. 91.0 ESR
    2. 91.0.1 ESR
    3. 91.1.0 ESR
    4. 91.2.0 ESR
    5. 91.3.0 ESR
    6. 91.4.0 ESR
    7. 91.4.1 ESR
    8. 91.5.0 ESR
    9. 91.5.1 ESR
    10. 91.6.0 ESR
    11. 91.6.1 ESR
    12. 91.7.0 ESR
    13. 91.7.1 ESR
    14. 91.8.0 ESR
    15. 91.9.0 ESR
    16. 91.9.1 ESR
    17. 91.10.0 ESR
    18. 91.11.0 ESR
    19. 91.12.0 ESR
    20. 91.13.0 ESR
  67. 90.0
    1. 90.0.1
    2. 90.0.2
  68. 89.0
    1. 89.0.1
    2. 89.0.2
  69. 88.0
    1. 88.0.1
  70. 87.0
  71. 86.0
    1. 86.0.1
  72. 85.0
    1. 85.0.1
    2. 85.0.2
  73. 84.0
    1. 84.0.1
    2. 84.0.2
  74. 83.0
  75. 82.0
    1. 82.0.1
    2. 82.0.2
    3. 82.0.3
  76. 81.0
    1. 81.0.1
    2. 81.0.2
  77. 80.0
    1. 80.0.1
  78. 79.0
  79. 78.0
    1. 78.0.1
    2. 78.0.2
    1. 78.0 ESR
    2. 78.0.1 ESR
    3. 78.0.2 ESR
    4. 78.1.0 ESR
    5. 78.2.0 ESR
    6. 78.3.0 ESR
    7. 78.3.1 ESR
    8. 78.4.0 ESR
    9. 78.4.1 ESR
    10. 78.5.0 ESR
    11. 78.6.0 ESR
    12. 78.6.1 ESR
    13. 78.7.0 ESR
    14. 78.7.1 ESR
    15. 78.8.0 ESR
    16. 78.9.0 ESR
    17. 78.10.0 ESR
    18. 78.10.1 ESR
    19. 78.11.0 ESR
    20. 78.12.0 ESR
    21. 78.13.0 ESR
    22. 78.14.0 ESR
    23. 78.15.0 ESR
  80. 77.0
    1. 77.0.1
  81. 76.0
    1. 76.0.1
  82. 75.0
  83. 74.0
    1. 74.0.1
  84. 73.0
    1. 73.0.1
  85. 72.0
    1. 72.0.1
    2. 72.0.2
  86. 71.0
  87. 70.0
    1. 70.0.1
  88. 69.0
    1. 69.0.1
    2. 69.0.2
    3. 69.0.3
  89. 68.0
    1. 68.0.1
    2. 68.0.2
    1. 68.0 ESR
    2. 68.0.1 ESR
    3. 68.0.2 ESR
    4. 68.1.0 ESR
    5. 68.2.0 ESR
    6. 68.3.0 ESR
    7. 68.4.0 ESR
    8. 68.4.1 ESR
    9. 68.4.2 ESR
    10. 68.5.0 ESR
    11. 68.6.0 ESR
    12. 68.6.1 ESR
    13. 68.7.0 ESR
    14. 68.8.0 ESR
    15. 68.9.0 ESR
    16. 68.10.0 ESR
    17. 68.11.0 ESR
    18. 68.12.0 ESR
  90. 67.0
    1. 67.0.1
    2. 67.0.2
    3. 67.0.3
    4. 67.0.4
  91. 66.0
    1. 66.0.1
    2. 66.0.2
    3. 66.0.3
    4. 66.0.4
    5. 66.0.5
  92. 65.0
    1. 65.0.1
    2. 65.0.2
  93. 64.0
    1. 64.0.2
  94. 63.0
    1. 63.0.1
    2. 63.0.3
  95. 62.0
    1. 62.0.2
    2. 62.0.3
  96. 61.0
    1. 61.0.1
    2. 61.0.2
  97. 60.0
    1. 60.0.1
    2. 60.0.2
    1. 60.0 ESR
    2. 60.0.1 ESR
    3. 60.0.2 ESR
    4. 60.1.0 ESR
    5. 60.2.0 ESR
    6. 60.2.1 ESR
    7. 60.2.2 ESR
    8. 60.3.0 ESR
    9. 60.4.0 ESR
    10. 60.5.0 ESR
    11. 60.5.1 ESR
    12. 60.5.2 ESR
    13. 60.6.0 ESR
    14. 60.6.1 ESR
    15. 60.6.2 ESR
    16. 60.6.3 ESR
    17. 60.7.0 ESR
    18. 60.7.1 ESR
    19. 60.7.2 ESR
    20. 60.8.0 ESR
    21. 60.9.0 ESR
  98. 59.0
    1. 59.0.1
    2. 59.0.2
    3. 59.0.3
  99. 58.0
    1. 58.0.1
    2. 58.0.2
  100. 57.0
    1. 57.0.1
    2. 57.0.2
    3. 57.0.3
    4. 57.0.4
  101. 56.0
    1. 56.0.1
    2. 56.0.2
  102. 55.0
    1. 55.0.1
    2. 55.0.2
    3. 55.0.3
  103. 54.0
    1. 54.0.1
  104. 53.0
    1. 53.0.2
    2. 53.0.3
  105. 52.0
    1. 52.0.1
    2. 52.0.2
    1. 52.0 ESR
    2. 52.0.1 ESR
    3. 52.0.2 ESR
    4. 52.1.0 ESR
    5. 52.1.1 ESR
    6. 52.1.2 ESR
    7. 52.2.0 ESR
    8. 52.2.1 ESR
    9. 52.3.0 ESR
    10. 52.4.0 ESR
    11. 52.4.1 ESR
    12. 52.5.0 ESR
    13. 52.5.2 ESR
    14. 52.5.3 ESR
    15. 52.6.0 ESR
    16. 52.7.0 ESR
    17. 52.7.1 ESR
    18. 52.7.2 ESR
    19. 52.7.3 ESR
    20. 52.7.4 ESR
    21. 52.8.0 ESR
    22. 52.8.1 ESR
    23. 52.9.0 ESR
  106. 51.0
    1. 51.0.1
  107. 50.0
    1. 50.0.1
    2. 50.0.2
    3. 50.1.0
  108. 49.0
    1. 49.0.1
    2. 49.0.2
  109. 48.0
    1. 48.0.1
    2. 48.0.2
  110. 47.0
    1. 47.0.1
    2. 47.0.2
  111. 46.0
    1. 46.0.1
  112. 45.0
    1. 45.0.1
    2. 45.0.2
    1. 45.0 ESR
    2. 45.0.1 ESR
    3. 45.0.2 ESR
    4. 45.1.0 ESR
    5. 45.1.1 ESR
    6. 45.2.0 ESR
    7. 45.3.0 ESR
    8. 45.4.0 ESR
    9. 45.5.0 ESR
    10. 45.5.1 ESR
    11. 45.6.0 ESR
    12. 45.7.0 ESR
    13. 45.8.0 ESR
    14. 45.9.0 ESR
  113. 44.0
    1. 44.0.1
    2. 44.0.2
  114. 43.0
    1. 43.0.1
    2. 43.0.2
    3. 43.0.3
    4. 43.0.4
  115. 42.0
  116. 41.0
    1. 41.0.1
    2. 41.0.2
  117. 40.0
    1. 40.0.2
    2. 40.0.3
  118. 39.0
    1. 39.0.3
  119. 38.0
    1. 38.0.1
    2. 38.0.5
    1. 38.1.0 ESR
    2. 38.1.1 ESR
    3. 38.2.0 ESR
    4. 38.2.1 ESR
    5. 38.3.0 ESR
    6. 38.4.0 ESR
    7. 38.5.0 ESR
    8. 38.5.1 ESR
    9. 38.5.2 ESR
    10. 38.6.0 ESR
    11. 38.6.1 ESR
    12. 38.7.0 ESR
    13. 38.7.1 ESR
    14. 38.8.0 ESR
  120. 37.0
    1. 37.0.1
    2. 37.0.2
  121. 36.0
    1. 36.0.1
    2. 36.0.3
    3. 36.0.4
  122. 35.0
    1. 35.0.1
  123. 34.0
    1. 34.0.5
  124. 33.1
    1. 33.1.1
  125. 33.0
    1. 33.0.1
    2. 33.0.2
    3. 33.0.3
  126. 32.0
    1. 32.0.1
    2. 32.0.2
    3. 32.0.3
  127. 31.0
    1. 31.0.0 ESR
    2. 31.1.0 ESR
    3. 31.1.1 ESR
    4. 31.2.0 ESR
    5. 31.3.0 ESR
    6. 31.4.0 ESR
    7. 31.5.0 ESR
    8. 31.5.2 ESR
    9. 31.5.3 ESR
    10. 31.6.0 ESR
    11. 31.7.0 ESR
    12. 31.8.0 ESR
  128. 30.0
  129. 29.0
    1. 29.0.1
  130. 28.0
  131. 27.0
    1. 27.0.1
  132. 26.0
  133. 25.0
    1. 25.0.1
  134. 24.0
    1. 24.1.0 ESR
    2. 24.1.1 ESR
    3. 24.2.0 ESR
    4. 24.3.0 ESR
    5. 24.4.0 ESR
    6. 24.5.0 ESR
    7. 24.6.0 ESR
    8. 24.7.0 ESR
    9. 24.8.0 ESR
    10. 24.8.1 ESR
  135. 23.0
    1. 23.0.1
  136. 22.0
  137. 21.0
  138. 20.0
    1. 20.0.1
  139. 19.0
    1. 19.0.1
    2. 19.0.2
  140. 18.0
    1. 18.0.1
    2. 18.0.2
  141. 17.0
    1. 17.0.6
    2. 17.0.7
    3. 17.0.8
    4. 17.0.9
    5. 17.0.10
    6. 17.0.11
    1. 17.0.1 ESR
    2. 17.0.2 ESR
    3. 17.0.3 ESR
    4. 17.0.4 ESR
    5. 17.0.5 ESR
  142. 16.0
    1. 16.0.1
    2. 16.0.2
  143. 15.0
    1. 15.0.1
  144. 14.0.1
  145. 13.0
    1. 13.0.1
  146. 12.0
  147. 11.0
  148. 10.0
    1. 10.0.1
    2. 10.0.2
    1. 10.0.3 ESR
    2. 10.0.4 ESR
    3. 10.0.5 ESR
    4. 10.0.6 ESR
    5. 10.0.7 ESR
    6. 10.0.8 ESR
    7. 10.0.9 ESR
    8. 10.0.10 ESR
    9. 10.0.11 ESR
    10. 10.0.12 ESR
  149. 9.0
    1. 9.0.1
  150. 8.0
    1. 8.0.1
  151. 7.0
    1. 7.0.1
  152. 6.0
    1. 6.0.1
    2. 6.0.2
  153. 5.0
    1. 5.0.1
  154. 4.0
    1. 4.0.1
  155. 3.6
    1. 3.6.2
    2. 3.6.3
    3. 3.6.4
    4. 3.6.6
    5. 3.6.7
    6. 3.6.8
    7. 3.6.9
    8. 3.6.10
    9. 3.6.11
    10. 3.6.12
    11. 3.6.13
    12. 3.6.14
    13. 3.6.15
    14. 3.6.16
    15. 3.6.17
    16. 3.6.18
    17. 3.6.19
    18. 3.6.20
    19. 3.6.21
    20. 3.6.22
    21. 3.6.23
    22. 3.6.24
    23. 3.6.25
    24. 3.6.26
    25. 3.6.27
    26. 3.6.28
  156. 3.5
    1. 3.5.1
    2. 3.5.2
    3. 3.5.3
    4. 3.5.4
    5. 3.5.5
    6. 3.5.6
    7. 3.5.7
    8. 3.5.8
    9. 3.5.9
    10. 3.5.10
    11. 3.5.11
    12. 3.5.12
    13. 3.5.13
    14. 3.5.14
    15. 3.5.15
    16. 3.5.16
    17. 3.5.17
    18. 3.5.18
    19. 3.5.19
  157. 3.0
    1. 3.0.1
    2. 3.0.2
    3. 3.0.3
    4. 3.0.4
    5. 3.0.5
    6. 3.0.6
    7. 3.0.7
    8. 3.0.8
    9. 3.0.9
    10. 3.0.10
    11. 3.0.11
    12. 3.0.12
    13. 3.0.13
    14. 3.0.14
    15. 3.0.15
    16. 3.0.16
    17. 3.0.17
    18. 3.0.18
    19. 3.0.19
  158. 2.0
    1. 2.0.0.1
    2. 2.0.0.2
    3. 2.0.0.3
    4. 2.0.0.4
    5. 2.0.0.5
    6. 2.0.0.6
    7. 2.0.0.7
    8. 2.0.0.8
    9. 2.0.0.9
    10. 2.0.0.10
    11. 2.0.0.11
    12. 2.0.0.12
    13. 2.0.0.13
    14. 2.0.0.14
    15. 2.0.0.15
    16. 2.0.0.16
    17. 2.0.0.17
    18. 2.0.0.18
    19. 2.0.0.19
    20. 2.0.0.20
  159. 1.5
    1. 1.5.0.1
    2. 1.5.0.2
    3. 1.5.0.3
    4. 1.5.0.4
    5. 1.5.0.5
    6. 1.5.0.6
    7. 1.5.0.7
    8. 1.5.0.8
    9. 1.5.0.9
    10. 1.5.0.10
    11. 1.5.0.11
    12. 1.5.0.12
  160. 1.0
    1. 1.0.1
    2. 1.0.2
    3. 1.0.3
    4. 1.0.4
    5. 1.0.5
    6. 1.0.6
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    8. 1.0.8
  161. 0.1
    1. 0.2
    2. 0.3
    3. 0.4
    4. 0.5
    5. 0.6
    6. 0.6.1
    7. 0.7
    8. 0.7.1
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    10. 0.9
    11. 0.9.1/0.9.2
    12. 0.9.3
    13. 1.0 Preview Release