Merge pull request #20296 from mcjimenez/bug1023142

Bug 1023142 - Adapt the WifiManager calls to use the correct object types (r = fcampo)
Merge pull request #20572 from lissyx/bug1025149

Bug 1025149 - Stop AppWindow events under kill() r=etienne_s
Merge pull request #20311 from guilherme-pg/bug1017748-fmd-oauth-url

Bug 1017748 - Use FxA's OAuth URL in Find My Device.