Issue mozilla-mobile#5818: Try to migrate default search engine.

Merge mozilla-mobile#5751

5751: update/subscribe push race workaround r=jonalmeida a=grigoryk



Co-authored-by: Grisha Kruglov <[email protected]>

Set version to 27.2.0.

Set version to 28.0.3.

Set version to 28.0.2.

Set version to 27.1.1.

Set version to 28.0.1.

Merge mozilla-mobile#5575

5575: Closes mozilla-mobile#5097: Add web domain for autofill in authentication dialog r=grigoryk a=rocketsroger



Co-authored-by: Roger Yang <[email protected]>

Set version to 27.1.0.

Set version to 27.0.5