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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. 155.0.0
    1. 155.0.1
  2. 154.0.0
    1. 154.0.1
  3. 153.0.0
    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. 152.0.0
    1. 152.0.1
    2. 152.0.2
    3. 152.0.3
    4. 152.0.4
    5. 152.0.5
    6. 152.0.6
  5. 151.0.0
    1. 151.0.1
    2. 151.0.2
    3. 151.0.3
    4. 151.0.4
  6. 150.0.0
    1. 150.0.1
    2. 150.0.2
    3. 150.0.3
  7. 149.0.0
    1. 149.0.2
  8. 148.0.0
    1. 148.0.2
  9. 147.0.0
    1. 147.0.1
    2. 147.0.2
    3. 147.0.3
    4. 147.0.4
  10. 146.0.0
    1. 146.0.1
  11. 145.0.0
    1. 145.0.1
    2. 145.0.2
  12. 144.0.0
    1. 144.0.2
  13. 143.0.0
    1. 143.0.1
    2. 143.0.3
    3. 143.0.4
  14. 142.0.0
    1. 142.0.1
  15. 141.0.0
    1. 141.0.2
    2. 141.0.3
  16. 140.0.0
    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
  17. 139.0.0
    1. 139.0.1
    2. 139.0.4
  18. 138.0.0
    1. 138.0.1
    2. 138.0.3
    3. 138.0.4
  19. 137.0.0
    1. 137.0.1
    2. 137.0.2
  20. 136.0.0
    1. 136.0.1
    2. 136.0.2
    3. 136.0.3
    4. 136.0.4
  21. 135.0.0
    1. 135.0.1
  22. 134.0.0
    1. 134.0.1
    2. 134.0.2
  23. 133.0.0
    1. 133.0.3
  24. 132.0.0
    1. 132.0.1
    2. 132.0.2
  25. 131.0.0
    1. 131.0.2
    2. 131.0.3
  26. 130.0.0
    1. 130.0.1
  27. 129.0.0
    1. 129.0.1
    2. 129.0.2
  28. 128.0.0
    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
  29. 127.0.0
    1. 127.0.1
    2. 127.0.2
  30. 126.0.0
    1. 126.0.1
  31. 125.0.1.0
    1. 125.0.2
    2. 125.0.3
  32. 124.0.0
    1. 124.0.1
    2. 124.0.2
  33. 123.0.0
    1. 123.0.1
  34. 122.0.0
    1. 122.0.1
  35. 121.0.0
    1. 121.0.1
  36. 120.0.0
    1. 120.0.1
  37. 119.0.0
    1. 119.0.1
  38. 118.0.0
    1. 118.0.1
    2. 118.0.2
  39. 117.0.0
    1. 117.0.1
  40. 116.0.0
    1. 116.0.1
    2. 116.0.2
    3. 116.0.3
  41. 115.0.0
    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
  42. 114.0.0
    1. 114.0.1
    2. 114.0.2
  43. 113.0.0
    1. 113.0.1
    2. 113.0.2
  44. 112.0.0
    1. 112.0.1
    2. 112.0.2
  45. 111.0.0
    1. 111.0.1
  46. 110.0.0
    1. 110.0.1
  47. 109.0.0
    1. 109.0.1
  48. 108.0.0
    1. 108.0.1
    2. 108.0.2
  49. 107.0.0
    1. 107.0.1
  50. 106.0.0
    1. 106.0.1
    2. 106.0.2
    3. 106.0.3
    4. 106.0.4
    5. 106.0.5
  51. 105.0.0
    1. 105.0.1
    2. 105.0.2
    3. 105.0.3
  52. 104.0.0
    1. 104.0.1
    2. 104.0.2
  53. 103.0.0
    1. 103.0.1
    2. 103.0.2
  54. 102.0.0
    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
  55. 101.0.0
    1. 101.0.1
  56. 100.0.0
    1. 100.0.1
    2. 100.0.2
  57. 99.0.0
    1. 99.0.1
  58. 98.0.0
    1. 98.0.1
    2. 98.0.2
  59. 97.0.0
    1. 97.0.1
    2. 97.0.2
  60. 96.0.0
    1. 96.0.1
    2. 96.0.2
    3. 96.0.3
  61. 95.0.0
    1. 95.0.1
    2. 95.0.2
  62. 94.0.0
    1. 94.0.1
    2. 94.0.2
  63. 93.0.0
  64. 92.0.0
    1. 92.0.1
  65. 91.0.0
    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
  66. 90.0.0
    1. 90.0.1
    2. 90.0.2
  67. 89.0.0
    1. 89.0.1
    2. 89.0.2
  68. 88.0.0
    1. 88.0.1
  69. 87.0.0
  70. 86.0.0
    1. 86.0.1
  71. 85.0.0
    1. 85.0.1
    2. 85.0.2
  72. 84.0.0
    1. 84.0.1
    2. 84.0.2
  73. 83.0.0
  74. 82.0.0
    1. 82.0.1
    2. 82.0.2
    3. 82.0.3
  75. 81.0.0
    1. 81.0.1
    2. 81.0.2
  76. 80.0.0
    1. 80.0.1
  77. 79.0.0
  78. 78.0.0
    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
  79. 77.0.0
    1. 77.0.1
  80. 76.0.0
    1. 76.0.1
  81. 75.0.0
  82. 74.0.0
    1. 74.0.1
  83. 73.0.0
    1. 73.0.1
  84. 72.0.0
    1. 72.0.1
    2. 72.0.2
  85. 71.0.0
  86. 70.0.0
    1. 70.0.1
  87. 69.0.0
    1. 69.0.1
    2. 69.0.2
    3. 69.0.3
  88. 68.0.0
    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
  89. 67.0.0
    1. 67.0.1
    2. 67.0.2
    3. 67.0.3
    4. 67.0.4
  90. 66.0.0
    1. 66.0.1
    2. 66.0.2
    3. 66.0.3
    4. 66.0.4
    5. 66.0.5
  91. 65.0.0
    1. 65.0.1
    2. 65.0.2
  92. 64.0.0
    1. 64.0.2
  93. 63.0.0
    1. 63.0.1
    2. 63.0.3
  94. 62.0.0
    1. 62.0.2
    2. 62.0.3
  95. 61.0.0
    1. 61.0.1
    2. 61.0.2
  96. 60.0.0
    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
  97. 59.0.0
    1. 59.0.1
    2. 59.0.2
    3. 59.0.3
  98. 58.0.0
    1. 58.0.1
    2. 58.0.2
  99. 57.0.0
    1. 57.0.1
    2. 57.0.2
    3. 57.0.3
    4. 57.0.4
  100. 56.0.0
    1. 56.0.1
    2. 56.0.2
  101. 55.0.0
    1. 55.0.1
    2. 55.0.2
    3. 55.0.3
  102. 54.0.0
    1. 54.0.1
  103. 53.0.0
    1. 53.0.2
    2. 53.0.3
  104. 52.0.0
    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
  105. 51.0.0
    1. 51.0.1
  106. 50.0.0
    1. 50.0.1
    2. 50.0.2
    3. 50.1.0
  107. 49.0.0
    1. 49.0.1
    2. 49.0.2
  108. 48.0.0
    1. 48.0.1
    2. 48.0.2
  109. 47.0.0
    1. 47.0.1
    2. 47.0.2
  110. 46.0.0
    1. 46.0.1
  111. 45.0.0
    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
  112. 44.0.0
    1. 44.0.1
    2. 44.0.2
  113. 43.0.0
    1. 43.0.1
    2. 43.0.2
    3. 43.0.3
    4. 43.0.4
  114. 42.0.0
  115. 41.0.0
    1. 41.0.1
    2. 41.0.2
  116. 40.0.0
    1. 40.0.2
    2. 40.0.3
  117. 39.0.0
    1. 39.0.3
  118. 38.0.0
    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
  119. 37.0.0
    1. 37.0.1
    2. 37.0.2
  120. 36.0.0
    1. 36.0.1
    2. 36.0.3
    3. 36.0.4
  121. 35.0.0
    1. 35.0.1
  122. 34.0.0
    1. 34.0.5
  123. 33.1.0
    1. 33.1.1
  124. 33.0.0
    1. 33.0.1
    2. 33.0.2
    3. 33.0.3
  125. 32.0.0
    1. 32.0.1
    2. 32.0.2
    3. 32.0.3
  126. 31.0.0
    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
  127. 30.0.0
  128. 29.0.0
    1. 29.0.1
  129. 28.0.0
  130. 27.0.0
    1. 27.0.1
  131. 26.0.0
  132. 25.0.0
    1. 25.0.1
  133. 24.0.0
    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
  134. 23.0.0
    1. 23.0.1
  135. 22.0.0
  136. 21.0.0
  137. 20.0.0
    1. 20.0.1
  138. 19.0.0
    1. 19.0.1
    2. 19.0.2
  139. 18.0.0
    1. 18.0.1
    2. 18.0.2
  140. 17.0.0
    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
  141. 16.0.0
    1. 16.0.1
    2. 16.0.2
  142. 15.0.0
    1. 15.0.1
  143. 14.0.1.0
  144. 13.0.0
    1. 13.0.1
  145. 12.0.0
  146. 11.0.0
  147. 10.0.0
    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
  148. 9.0.0
    1. 9.0.1
  149. 8.0.0
    1. 8.0.1
  150. 7.0.0
    1. 7.0.1
  151. 6.0.0
    1. 6.0.1
    2. 6.0.2
  152. 5.0.0
    1. 5.0.1
  153. 4.0.0
    1. 4.0.1
  154. 3.6.0
    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
  155. 3.5.0
    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
  156. 3.0.0
    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
  157. 2.0.0
    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
  158. 1.5.0
    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
  159. 1.0.0
    1. 1.0.1
    2. 1.0.2
    3. 1.0.3
    4. 1.0.4
    5. 1.0.5
    6. 1.0.6
    7. 1.0.7
    8. 1.0.8
  160. 0.1.0
    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
    9. 0.8
    10. 0.9
    11. 0.9.1/0.9.2
    12. 0.9.3
    13. 1.0 Preview Release