Bug 1043884 - Fix contacts scrollbar overlay shows empty content when click it
Bug 1075353 - 1st inline activity is not killed before the second inline activity comes.
Bug 1072366 - [Lockscreen] Locking while the unlocking animation performs lead to black screen
Merge pull request #25132 from RudyLu/ime/Bug1077609_uplift_v2.1

Bug 1077609 - uplift to v2.1.
(cherry picked from commit f37fac7ad3e05f8c5fb964c738848b86a62bce05)
a=v2.0, bajaj.
Bug 1081243 - [Downloads] A recently download file can not be open. Patch v2.0
Bug 1004985 - Close screenshot notification when user responds to it. r=timdream
Bug 1032068 - Maintain id pool of activity chaining instances to keep only one chaining
Merge pull request #25313 from cctuan/1075353-v20

Bug 1075353 - 1st inline activity is not killed before the second inline activity comes.
Bug 1085380 - First activity is not killed after the second one started
Merge pull request #25489 from mancas/bug1081243_v2.0

Bug 1081243 - [Downloads] A recently download file can not be open. Patc...
Merge pull request #24279 from shamenchens/Bug1043884-ContactsScrollbarOverlay

Bug 1043884 - Fix contacts scrollbar overlay shows empty content when click
Merge pull request #24783 from snowmantw/issue1072366-2.0

Bug 1072366 - [Lockscreen] Locking while the unlocking animation perform...