Merge pull request #20154 from benfrancis/1021777

Bug 1021777 - Set multiple search engines by default r=daleharvey
Merge pull request #20390 from davidflanagan/bug837674

Bug 837674: add app startup time instrumentation r=Eli
Merge pull request #20451 from KevinGrandon/bug_1022976_collection_multi_create

Bug 1022976 - [Collection] Intermittent adding records does not work
Merge pull request #20462 from KevinGrandon/bug_1024745_vertical_resume_download_icon

Bug 1024745 - [Vertical Homescreen] Marketplace app shows the default icon if the download has been paused
Bug 1024387 - [Collection App] Basic background support for Collection icons r=ranbena
Merge pull request #20388 from KevinGrandon/bug_1023011_vertical_pressed_state

Bug 1023011 - (vertical-homescreen) Implement pressed state visual for App Icons
Merge pull request #20510 from KevinGrandon/bug_1025236_statusbar_transition

Bug 1025236 - [Vertical] Statusbar transition not correct when scrolling
Merge pull request #20513 from lightsofapollo/landscape-bugs

Bug 1024947 - Lock search app orientation