[ONE Android Development] airwave209gt:
Meanwhile, not sure I should post bug report or not... but if there is still people (not just me) using it and people working on it, I think it's still worth reporting here.

I couldn't sync my Firefox account after logged in. Instead, logcat said

W/FxAccounts(32349): firefox :: FxAccountSyncAdapter :: Global session failed.
E/FxAccounts(32349): firefox :: FxAccountSyncAdapter :: Got exception syncing.
E/FxAccounts(32349): java.security.GeneralSecurityException: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.go(BaseResource.java:370)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.post(BaseResource.java:404)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.post(BaseResource.java:525)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRecordRequest.post(SyncStorageRecordRequest.java:64)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRecordRequest.post(SyncStorageRecordRequest.java:89)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.SyncClientsEngineStage.uploadClientRecord(SyncClientsEngineStage.java:671)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.SyncClientsEngineStage.checkAndUpload(SyncClientsEngineStage.java:599)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.SyncClientsEngineStage$ClientDownloadDelegate.handleRequestSuccess(SyncClientsEngineStage.java:181)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageCollectionRequest$SyncCollectionResourceDelegate.handleHttpResponse(SyncStorageCollectionRequest.java:143)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.execute(BaseResource.java:342)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.go(BaseResource.java:373)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.get(BaseResource.java:379)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRequest.get(SyncStorageRequest.java:178)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.SyncClientsEngineStage.downloadClientRecords(SyncClientsEngineStage.java:642)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.SyncClientsEngineStage.execute(SyncClientsEngineStage.java:412)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.AbstractSessionManagingSyncStage.execute(AbstractSessionManagingSyncStage.java:41)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.GlobalSession.advance(GlobalSession.java:284)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.EnsureCrypto5KeysStage.execute(EnsureCrypto5KeysStage.java:49)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.AbstractSessionManagingSyncStage.execute(AbstractSessionManagingSyncStage.java:41)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.GlobalSession.advance(GlobalSession.java:284)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.GlobalSession.processMetaGlobal(GlobalSession.java:701)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.FetchMetaGlobalStage.execute(FetchMetaGlobalStage.java:68)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.AbstractSessionManagingSyncStage.execute(AbstractSessionManagingSyncStage.java:41)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.GlobalSession.advance(GlobalSession.java:284)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.FetchInfoConfigurationStage$StageInfoConfigurationDelegate.handleSuccess(FetchInfoConfigurationStage.java:31)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.JSONRecordFetcher$JSONFetchHandler.handleRequestSuccess(JSONRecordFetcher.java:58)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRequest$SyncStorageResourceDelegate.handleHttpResponse(SyncStorageRequest.java:126)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.execute(BaseResource.java:342)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.go(BaseResource.java:373)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.get(BaseResource.java:379)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRequest.get(SyncStorageRequest.java:178)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.JSONRecordFetcher.fetch(JSONRecordFetcher.java:83)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.FetchInfoConfigurationStage.execute(FetchInfoConfigurationStage.java:57)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.AbstractSessionManagingSyncStage.execute(AbstractSessionManagingSyncStage.java:41)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.GlobalSession.advance(GlobalSession.java:284)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.stage.FetchInfoCollectionsStage$StageInfoCollectionsDelegate.handleSuccess(FetchInfoCollectionsStage.java:20)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.JSONRecordFetcher$JSONFetchHandler.handleRequestSuccess(JSONRecordFetcher.java:58)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.SyncStorageRequest$SyncStorageResourceDelegate.handleHttpResponse(SyncStorageRequest.java:126)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.execute(BaseResource.java:342)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.net.BaseResource.go(BaseResource.java:373)
E/FxAccounts(32349):	at org.mozilla.gecko.sync.ne

Secondly, when I tried to enable screen recording from global menu (long press power switch), it didn't record. Instead logcat said

W/ContextImpl( 1025): Calling a method in the system process without a qualified user: android.app.ContextImpl.sendBroadcast:1351 com.android.internal.policy.impl.GlobalActions.toggleScreenRecord:517 com.android.internal.policy.impl.GlobalActions.access$1000:95 com.android.internal.policy.impl.GlobalActions$6.onPress:450 com.android.internal.policy.impl.GlobalActions.onClick:559

This did not happen in the last official build, i.e. 20151111.

Hope you can look into them when you have time work on the next build. Thanks again for the maintenance effort, when the nougats seems to not like my OPO very much :)