Bug 970658 - Cache downloaded extensions in build_stage
change to http from https
fix build integration tests
Bug 1033632 - [Collections] Highlight on all app title occurs when tapping on a title of an app
Merge pull request #20245 from eeejay/bug-970658

Bug 970658 - Cache downloaded extensions in build_stage. r=ochameau
Merge pull request #21308 from KevinGrandon/bug_1033632_collection_user_select

Bug 1033632 - [Collections] Highlight on all app title occurs when tapping on a title of an app