QA/Fennec/67/Beta/4/BugVerification

QA Assignment

Assigned	Completed	Results
Stefan Deiac	March 22nd, 2019	PASS
Sorina Florean	March 22nd, 2019	PASS

Bugs Verified:
- bug 1535766 - Crash in [@ mozilla::WebrtcGmpVideoEncoder::Encoded]
- bug 1534290 - Edited usernames not synced on Nightly

_{Example Bug:
**{{Bug|1305969}} - Fennec sometimes get stuck in a state where there is a perma-bar of white on the bottom of the screen}