Upcoming Firefox release milestones

June 2023
SMTWTFS
1
115 soft Code Freeze starts at 08:00 UTC
2
String Freeze
115 regression testing completed
3
4
5
Merge day
115 b1 GTB
Nightly 116 starts
6
114 Release
115 b2 GTB
7
8
115 b3 GTB
9
SUMO deadline
116 QA request deadline for Nightly
10
11
115 b4 GTB
12
13
115 b5 GTB
14
15
115 b6 GTB
16
116 build ready for nightly QA
17
18
115 b7 GTB
19
SUMO content localization starts
20
Planned 114.0.x
115 b8 GTB
21
115 QA sign off
22
115 b9 GTB
23
24
25
26
115 go to Build
27
RC
28
116 build ready for beta QA
29
116 soft Code Freeze starts at 08:00 UTC
30
String Freeze
116 regression testing completed

July 2023
SMTWTFS
1
2
3
4
115 Release
Merge day
116 b1 GTB
Nightly 117 starts
5
6
116 b2 GTB
7
SUMO deadline
117 QA request deadline for Nightly
8
9
116 b3 GTB
10
11
116 b4 GTB
12
13
116 b5 GTB
14
117 build ready for nightly QA
15
16
116 b6 GTB
17
SUMO content localization starts
18
Planned 115.0.x
116 b7 GTB
19
20
116 b8 GTB
21
22
23
24
25
26
116 QA sign off
117 build ready for beta QA
27
117 soft Code Freeze starts at 08:00 UTC
28
String Freeze
117 regression testing completed
29
30
31
116 go to Build
Merge day
117 b1 GTB
Nightly 118 starts

August 2023
SMTWTFS
1
RC
116 Release
117 b2 GTB
2
3
117 b3 GTB
4
SUMO deadline
118 QA request deadline for Nightly
5
6
117 b4 GTB
7
8
117 b5 GTB
9
10
117 b6 GTB
11
118 build ready for nightly QA
12
13
117 b7 GTB
14
SUMO content localization starts
15
Planned 116.0.x
117 b8 GTB
16
117 QA sign off
17
117 b9 GTB
18
19
20
21
117 go to Build
22
RC
23
118 build ready for beta QA
24
118 soft Code Freeze starts at 08:00 UTC
25
String Freeze
118 regression testing completed
26
27
28
Merge day
118 b1 GTB
Nightly 119 starts
29
117 Release
118 b2 GTB
30
31
118 b3 GTB

August 2023
SMTWTFS
1
RC
116 Release
117 b2 GTB
2
3
117 b3 GTB
4
SUMO deadline
118 QA request deadline for Nightly
5
6
117 b4 GTB
7
8
117 b5 GTB
9
10
117 b6 GTB
11
118 build ready for nightly QA
12
13
117 b7 GTB
14
SUMO content localization starts
15
Planned 116.0.x
117 b8 GTB
16
117 QA sign off
17
117 b9 GTB
18
19
20
21
117 go to Build
22
RC
23
118 build ready for beta QA
24
118 soft Code Freeze starts at 08:00 UTC
25
String Freeze
118 regression testing completed
26
27
28
Merge day
118 b1 GTB
Nightly 119 starts
29
117 Release
118 b2 GTB
30
31
118 b3 GTB

September 2023
SMTWTFS
1
SUMO deadline
119 QA request deadline for Nightly
2
3
118 b4 GTB
4
5
118 b5 GTB
6
7
118 b6 GTB
8
119 build ready for nightly QA
9
10
118 b7 GTB
11
SUMO content localization starts
12
Planned 117.0.x
118 b8 GTB
13
118 QA sign off
14
118 b9 GTB
15
16
17
18
118 go to Build
19
RC
20
119 build ready for beta QA
21
119 soft Code Freeze starts at 08:00 UTC
22
String Freeze
119 regression testing completed
23
24
25
Merge day
119 b1 GTB
Nightly 120 starts
26
118 Release
119 b2 GTB
27
28
119 b3 GTB
29
SUMO deadline
120 QA request deadline for Nightly
30

October 2023
SMTWTFS
1
119 b4 GTB
2
3
119 b5 GTB
4
5
119 b6 GTB
6
120 build ready for nightly QA
7
8
119 b7 GTB
9
SUMO content localization starts
10
Planned 118.0.x
119 b8 GTB
11
119 QA sign off
12
119 b9 GTB
13
14
15
16
119 go to Build
17
RC
18
120 build ready for beta QA
19
120 soft Code Freeze starts at 08:00 UTC
20
String Freeze
120 regression testing completed
21
22
23
Merge day
120 b1 GTB
Nightly 121 starts
24
119 Release
120 b2 GTB
25
26
120 b3 GTB
27
SUMO deadline
121 QA request deadline for Nightly
28
29
120 b4 GTB
30
31
120 b5 GTB

November 2023
SMTWTFS
1
2
120 b6 GTB
3
121 build ready for nightly QA
4
5
120 b7 GTB
6
SUMO content localization starts
7
Planned 119.0.x
120 b8 GTB
8
120 QA sign off
9
120 b9 GTB
10
11
12
13
120 go to Build
14
RC
15
121 build ready for beta QA
16
121 soft Code Freeze starts at 08:00 UTC
17
String Freeze
121 regression testing completed
18
19
20
Merge day
121 b1 GTB
Nightly 122 starts
21
120 Release
121 b2 GTB
22
23
121 b3 GTB
24
SUMO deadline
122 QA request deadline for Nightly
25
26
121 b4 GTB
27
28
121 b5 GTB
29
30
121 b6 GTB

December 2023
SMTWTFS
1
122 build ready for nightly QA
2
3
121 b7 GTB
4
SUMO content localization starts
5
Planned 120.0.x
121 b8 GTB
6
121 QA sign off
7
121 b9 GTB
8
9
10
11
121 go to Build
12
RC
13
122 build ready for beta QA
14
122 soft Code Freeze starts at 08:00 UTC
15
String Freeze
122 regression testing completed
16
17
18
Merge day
122 b1 GTB
19
121 Release
122 b2 GTB
20
21
122 b3 GTB
22
SUMO deadline
23
24
122 b4 GTB
25
26
122 b5 GTB
27
28
122 b6 GTB
29
30
31
122 b7 GTB

January 2024
SMTWTFS
1
SUMO content localization starts
2
Planned 121.0.x
122 b8 GTB
3
122 QA sign off
4
122 b9 GTB
5
6
7
8
122 go to Build
9
RC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
122 Release
24
25
26
27
28
29
30
31