Firefox EOS & EOL timeline

Check Firefox end-of-support (EOS), end-of-life (EOL), release and extended-support dates. Compare versions and plan your next upgrade.

Software59 release timelinesData updated: Oct 26, 2026, 9:56 AM UTC

128LTS
End of life
1. ReleasedJul 9, 2024
2. End of life (EOL)Sep 16, 2025
End of support (EOS)
Not announced
Extended support
Not announced
127
End of life
1. ReleasedJun 11, 2024
2. End of life (EOL)Jul 9, 2024
End of support (EOS)
Not announced
Extended support
Not announced
126
End of life
1. ReleasedMay 14, 2024
2. End of life (EOL)Jun 11, 2024
End of support (EOS)
Not announced
Extended support
Not announced
125
End of life
1. ReleasedApr 16, 2024
2. End of life (EOL)May 14, 2024
End of support (EOS)
Not announced
Extended support
Not announced
124
End of life
1. ReleasedMar 19, 2024
2. End of life (EOL)Apr 16, 2024
End of support (EOS)
Not announced
Extended support
Not announced
123
End of life
1. ReleasedFeb 20, 2024
2. End of life (EOL)Mar 19, 2024
End of support (EOS)
Not announced
Extended support
Not announced
122
End of life
1. ReleasedJan 23, 2024
2. End of life (EOL)Feb 20, 2024
End of support (EOS)
Not announced
Extended support
Not announced
121
End of life
1. ReleasedDec 19, 2023
2. End of life (EOL)Jan 23, 2024
End of support (EOS)
Not announced
Extended support
Not announced
120
End of life
1. ReleasedNov 21, 2023
2. End of life (EOL)Dec 19, 2023
End of support (EOS)
Not announced
Extended support
Not announced
119
End of life
1. ReleasedOct 24, 2023
2. End of life (EOL)Nov 21, 2023
End of support (EOS)
Not announced
Extended support
Not announced
118
End of life
1. ReleasedSep 26, 2023
2. End of life (EOL)Oct 24, 2023
End of support (EOS)
Not announced
Extended support
Not announced
117
End of life
1. ReleasedAug 29, 2023
2. End of life (EOL)Sep 26, 2023
End of support (EOS)
Not announced
Extended support
Not announced
116
End of life
1. ReleasedAug 1, 2023
2. End of life (EOL)Aug 29, 2023
End of support (EOS)
Not announced
Extended support
Not announced
115LTS
Ending soon
1. ReleasedJul 4, 2023
2. End of life (EOL)Mar 31, 2027
End of support (EOS)
Not announced
Extended support
Not announced
114
End of life
1. ReleasedJun 6, 2023
2. End of life (EOL)Jul 4, 2023
End of support (EOS)
Not announced
Extended support
Not announced
113
End of life
1. ReleasedMay 9, 2023
2. End of life (EOL)Jun 6, 2023
End of support (EOS)
Not announced
Extended support
Not announced
112
End of life
1. ReleasedApr 11, 2023
2. End of life (EOL)May 9, 2023
End of support (EOS)
Not announced
Extended support
Not announced
111
End of life
1. ReleasedMar 14, 2023
2. End of life (EOL)Apr 11, 2023
End of support (EOS)
Not announced
Extended support
Not announced
110
End of life
1. ReleasedFeb 14, 2023
2. End of life (EOL)Mar 14, 2023
End of support (EOS)
Not announced
Extended support
Not announced
109
End of life
1. ReleasedJan 17, 2023
2. End of life (EOL)Feb 14, 2023
End of support (EOS)
Not announced
Extended support
Not announced
108
End of life
1. ReleasedDec 13, 2022
2. End of life (EOL)Jan 17, 2023
End of support (EOS)
Not announced
Extended support
Not announced
107
End of life
1. ReleasedNov 15, 2022
2. End of life (EOL)Dec 13, 2022
End of support (EOS)
Not announced
Extended support
Not announced
106
End of life
1. ReleasedOct 18, 2022
2. End of life (EOL)Nov 15, 2022
End of support (EOS)
Not announced
Extended support
Not announced
105
End of life
1. ReleasedSep 20, 2022
2. End of life (EOL)Oct 18, 2022
End of support (EOS)
Not announced
Extended support
Not announced
104
End of life
1. ReleasedAug 23, 2022
2. End of life (EOL)Sep 20, 2022
End of support (EOS)
Not announced
Extended support
Not announced
103
End of life
1. ReleasedJul 26, 2022
2. End of life (EOL)Aug 23, 2022
End of support (EOS)
Not announced
Extended support
Not announced
102LTS
End of life
1. ReleasedJun 28, 2022
2. End of life (EOL)Sep 26, 2023
End of support (EOS)
Not announced
Extended support
Not announced
91LTS
End of life
1. ReleasedAug 10, 2021
2. End of life (EOL)Sep 20, 2022
End of support (EOS)
Not announced
Extended support
Not announced
78LTS
End of life
1. ReleasedJun 30, 2020
2. End of life (EOL)Nov 2, 2021
End of support (EOS)
Not announced
Extended support
Not announced

Support milestones: end of support = Active support; end of life = Security Support. Unknown dates are shown as “Not announced”. Paid extended support is separate from standard end of life. Support windows may vary by version and edition. Timeline spacing is not a duration scale.

Firefox EOS & EOL timeline

128LTS

115LTS

102LTS

91LTS

78LTS